diff --git a/spec/core_functions/color/adjust/global.hrx b/spec/core_functions/color/adjust/global.hrx
index 25286108b..0f11194cc 100644
--- a/spec/core_functions/color/adjust/global.hrx
+++ b/spec/core_functions/color/adjust/global.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> legacy/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -29,7 +29,7 @@ a {
 }
 
 <===> non_legacy/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.change instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/adjust/units.hrx b/spec/core_functions/color/adjust/units.hrx
index 1de839cba..c7facb3a5 100644
--- a/spec/core_functions/color/adjust/units.hrx
+++ b/spec/core_functions/color/adjust/units.hrx
@@ -30,7 +30,7 @@ a {
 }
 
 <===> hue/unknown/warning
-DEPRECATION WARNING: $hue: Passing a unit other than deg (60in) is deprecated.
+DEPRECATION WARNING [function-units]: $hue: Passing a unit other than deg (60in) is deprecated.
 
 To preserve current behavior: calc($hue / 1in)
 
@@ -76,7 +76,7 @@ a {
 }
 
 <===> saturation/unitless/warning
-DEPRECATION WARNING: $saturation: Passing a number without unit % (-10) is deprecated.
+DEPRECATION WARNING [function-units]: $saturation: Passing a number without unit % (-10) is deprecated.
 
 To preserve current behavior: $saturation * 1%
 
@@ -100,7 +100,7 @@ a {
 }
 
 <===> saturation/unknown/warning
-DEPRECATION WARNING: $saturation: Passing a number without unit % (-10in) is deprecated.
+DEPRECATION WARNING [function-units]: $saturation: Passing a number without unit % (-10in) is deprecated.
 
 To preserve current behavior: calc($saturation / 1in * 1%)
 
@@ -135,7 +135,7 @@ a {
 }
 
 <===> lightness/unitless/warning
-DEPRECATION WARNING: $lightness: Passing a number without unit % (10) is deprecated.
+DEPRECATION WARNING [function-units]: $lightness: Passing a number without unit % (10) is deprecated.
 
 To preserve current behavior: $lightness * 1%
 
@@ -159,7 +159,7 @@ a {
 }
 
 <===> lightness/unknown/warning
-DEPRECATION WARNING: $lightness: Passing a number without unit % (10in) is deprecated.
+DEPRECATION WARNING [function-units]: $lightness: Passing a number without unit % (10in) is deprecated.
 
 To preserve current behavior: calc($lightness / 1in * 1%)
 
@@ -194,7 +194,7 @@ a {
 }
 
 <===> alpha/percent/warning
-DEPRECATION WARNING: $alpha: Passing a number with unit % is deprecated.
+DEPRECATION WARNING [function-units]: $alpha: Passing a number with unit % is deprecated.
 
 To preserve current behavior: calc($alpha / 1%)
 
@@ -218,7 +218,7 @@ a {
 }
 
 <===> alpha/unknown/warning
-DEPRECATION WARNING: $alpha: Passing a number with unit px is deprecated.
+DEPRECATION WARNING [function-units]: $alpha: Passing a number with unit px is deprecated.
 
 To preserve current behavior: calc($alpha / 1px)
 
diff --git a/spec/core_functions/color/adjust_hue/above_max.hrx b/spec/core_functions/color/adjust_hue/above_max.hrx
index 7dc73b065..44ab1141f 100644
--- a/spec/core_functions/color/adjust_hue/above_max.hrx
+++ b/spec/core_functions/color/adjust_hue/above_max.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 540deg)
 
diff --git a/spec/core_functions/color/adjust_hue/alpha.hrx b/spec/core_functions/color/adjust_hue/alpha.hrx
index 83d731342..bdc77dd58 100644
--- a/spec/core_functions/color/adjust_hue/alpha.hrx
+++ b/spec/core_functions/color/adjust_hue/alpha.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 359deg)
 
diff --git a/spec/core_functions/color/adjust_hue/error.hrx b/spec/core_functions/color/adjust_hue/error.hrx
index c66e9fd10..f32e049a2 100644
--- a/spec/core_functions/color/adjust_hue/error.hrx
+++ b/spec/core_functions/color/adjust_hue/error.hrx
@@ -36,7 +36,7 @@ Error: Only 2 arguments allowed, but 3 were passed.
 a {b: adjust-hue(1, 2)}
 
 <===> type/color/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -60,7 +60,7 @@ Error: $color: 1 is not a color.
 a {b: adjust-hue(red, blue)}
 
 <===> type/hue/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -84,7 +84,7 @@ Error: $degrees: blue is not a number.
 a {b: adjust-hue(lch(0% 0 0deg), 10deg)}
 
 <===> non_legacy/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/adjust_hue/fraction.hrx b/spec/core_functions/color/adjust_hue/fraction.hrx
index 68008e03b..986467757 100644
--- a/spec/core_functions/color/adjust_hue/fraction.hrx
+++ b/spec/core_functions/color/adjust_hue/fraction.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 0.5deg)
 
diff --git a/spec/core_functions/color/adjust_hue/max.hrx b/spec/core_functions/color/adjust_hue/max.hrx
index 0224a4c9e..53f632d64 100644
--- a/spec/core_functions/color/adjust_hue/max.hrx
+++ b/spec/core_functions/color/adjust_hue/max.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 359deg)
 
diff --git a/spec/core_functions/color/adjust_hue/middle.hrx b/spec/core_functions/color/adjust_hue/middle.hrx
index 63769aee3..30df04fd9 100644
--- a/spec/core_functions/color/adjust_hue/middle.hrx
+++ b/spec/core_functions/color/adjust_hue/middle.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 123deg)
 
diff --git a/spec/core_functions/color/adjust_hue/min.hrx b/spec/core_functions/color/adjust_hue/min.hrx
index 24e65e1bf..545d19cf5 100644
--- a/spec/core_functions/color/adjust_hue/min.hrx
+++ b/spec/core_functions/color/adjust_hue/min.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 0deg)
 
diff --git a/spec/core_functions/color/adjust_hue/named.hrx b/spec/core_functions/color/adjust_hue/named.hrx
index ed7a9f6a6..2c750d4af 100644
--- a/spec/core_functions/color/adjust_hue/named.hrx
+++ b/spec/core_functions/color/adjust_hue/named.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 123deg)
 
diff --git a/spec/core_functions/color/adjust_hue/negative.hrx b/spec/core_functions/color/adjust_hue/negative.hrx
index 47abc516f..dc8ae9469 100644
--- a/spec/core_functions/color/adjust_hue/negative.hrx
+++ b/spec/core_functions/color/adjust_hue/negative.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: -180deg)
 
diff --git a/spec/core_functions/color/adjust_hue/units.hrx b/spec/core_functions/color/adjust_hue/units.hrx
index a0bc77b14..d132eba95 100644
--- a/spec/core_functions/color/adjust_hue/units.hrx
+++ b/spec/core_functions/color/adjust_hue/units.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> deg/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 60deg)
 
@@ -41,7 +41,7 @@ a {
 }
 
 <===> unitless/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -52,7 +52,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 60deg)
 
@@ -75,7 +75,7 @@ a {
 }
 
 <===> unknown/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -86,7 +86,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: $degrees: Passing a unit other than deg (60in) is deprecated.
+DEPRECATION WARNING [function-units]: $degrees: Passing a unit other than deg (60in) is deprecated.
 
 To preserve current behavior: calc($degrees / 1in)
 
@@ -98,7 +98,7 @@ See https://sass-lang.com/d/function-units
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 60deg)
 
@@ -121,7 +121,7 @@ a {
 }
 
 <===> angle/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -132,7 +132,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: adjust-hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: adjust-hue() is deprecated. Suggestion:
 
 color.adjust($color, $hue: 3437.7467707849deg)
 
diff --git a/spec/core_functions/color/alpha.hrx b/spec/core_functions/color/alpha.hrx
index d0f933003..dd9948ec6 100644
--- a/spec/core_functions/color/alpha.hrx
+++ b/spec/core_functions/color/alpha.hrx
@@ -73,7 +73,7 @@ a {
 }
 
 <===> filter/space_before_equals/warning
-DEPRECATION WARNING: Using color.alpha() for a Microsoft filter is deprecated.
+DEPRECATION WARNING [color-module-compat]: Using color.alpha() for a Microsoft filter is deprecated.
 
 Recommendation: alpha(c = d)
 
@@ -158,7 +158,7 @@ a {
 }
 
 <===> css_overloads/alpha/one_arg/warning
-DEPRECATION WARNING: Using color.alpha() for a Microsoft filter is deprecated.
+DEPRECATION WARNING [color-module-compat]: Using color.alpha() for a Microsoft filter is deprecated.
 
 Recommendation: alpha(c=d)
 
@@ -180,7 +180,7 @@ a {
 }
 
 <===> css_overloads/alpha/multi_arg/warning
-DEPRECATION WARNING: Using color.alpha() for a Microsoft filter is deprecated.
+DEPRECATION WARNING [color-module-compat]: Using color.alpha() for a Microsoft filter is deprecated.
 
 Recommendation: alpha(c=d, e=f, g=h)
 
@@ -202,7 +202,7 @@ a {
 }
 
 <===> css_overloads/opacity/warning
-DEPRECATION WARNING: Passing a number (1 to color.opacity() is deprecated.
+DEPRECATION WARNING [color-module-compat]: Passing a number (1 to color.opacity() is deprecated.
 
 Recommendation: opacity(1)
 
diff --git a/spec/core_functions/color/blackness.hrx b/spec/core_functions/color/blackness.hrx
index f4a6eb1d3..f91e05d52 100644
--- a/spec/core_functions/color/blackness.hrx
+++ b/spec/core_functions/color/blackness.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: color.blackness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blackness() is deprecated. Suggestion:
 
 color.channel($color, "blackness", $space: hwb)
 
@@ -32,7 +32,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: color.blackness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blackness() is deprecated. Suggestion:
 
 color.channel($color, "blackness", $space: hwb)
 
@@ -56,7 +56,7 @@ a {
 }
 
 <===> middle/zero_whiteness/warning
-DEPRECATION WARNING: color.blackness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blackness() is deprecated. Suggestion:
 
 color.channel($color, "blackness", $space: hwb)
 
@@ -80,7 +80,7 @@ a {
 }
 
 <===> middle/half_whiteness/warning
-DEPRECATION WARNING: color.blackness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blackness() is deprecated. Suggestion:
 
 color.channel($color, "blackness", $space: hwb)
 
@@ -104,7 +104,7 @@ a {
 }
 
 <===> middle/high_whiteness/warning
-DEPRECATION WARNING: color.blackness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blackness() is deprecated. Suggestion:
 
 color.channel($color, "blackness", $space: hwb)
 
@@ -128,7 +128,7 @@ a {
 }
 
 <===> fraction/warning
-DEPRECATION WARNING: color.blackness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blackness() is deprecated. Suggestion:
 
 color.channel($color, "blackness", $space: hwb)
 
@@ -152,7 +152,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: color.blackness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blackness() is deprecated. Suggestion:
 
 color.channel($color, "blackness", $space: hwb)
 
diff --git a/spec/core_functions/color/blue.hrx b/spec/core_functions/color/blue.hrx
index c469e8b83..4d8c6eb90 100644
--- a/spec/core_functions/color/blue.hrx
+++ b/spec/core_functions/color/blue.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
@@ -32,7 +32,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
@@ -56,7 +56,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
@@ -80,7 +80,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
diff --git a/spec/core_functions/color/change/global.hrx b/spec/core_functions/color/change/global.hrx
index 71d9215cb..7be9843d8 100644
--- a/spec/core_functions/color/change/global.hrx
+++ b/spec/core_functions/color/change/global.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> legacy/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.change instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -29,7 +29,7 @@ a {
 }
 
 <===> non_legacy/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.change instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/change/hsl.hrx b/spec/core_functions/color/change/hsl.hrx
index b98d1969b..413c09046 100644
--- a/spec/core_functions/color/change/hsl.hrx
+++ b/spec/core_functions/color/change/hsl.hrx
@@ -305,7 +305,7 @@ a {
 }
 
 <===> units/hue/unknown/warning
-DEPRECATION WARNING: $hue: Passing a unit other than deg (60in) is deprecated.
+DEPRECATION WARNING [function-units]: $hue: Passing a unit other than deg (60in) is deprecated.
 
 To preserve current behavior: calc($hue / 1in)
 
@@ -351,7 +351,7 @@ a {
 }
 
 <===> units/saturation/unitless/warning
-DEPRECATION WARNING: $saturation: Passing a number without unit % (50) is deprecated.
+DEPRECATION WARNING [function-units]: $saturation: Passing a number without unit % (50) is deprecated.
 
 To preserve current behavior: $saturation * 1%
 
@@ -375,7 +375,7 @@ a {
 }
 
 <===> units/saturation/unknown/warning
-DEPRECATION WARNING: $saturation: Passing a number without unit % (50in) is deprecated.
+DEPRECATION WARNING [function-units]: $saturation: Passing a number without unit % (50in) is deprecated.
 
 To preserve current behavior: calc($saturation / 1in * 1%)
 
@@ -410,7 +410,7 @@ a {
 }
 
 <===> units/lightness/unitless/warning
-DEPRECATION WARNING: $lightness: Passing a number without unit % (30) is deprecated.
+DEPRECATION WARNING [function-units]: $lightness: Passing a number without unit % (30) is deprecated.
 
 To preserve current behavior: $lightness * 1%
 
@@ -434,7 +434,7 @@ a {
 }
 
 <===> units/lightness/unknown/warning
-DEPRECATION WARNING: $lightness: Passing a number without unit % (30in) is deprecated.
+DEPRECATION WARNING [function-units]: $lightness: Passing a number without unit % (30in) is deprecated.
 
 To preserve current behavior: calc($lightness / 1in * 1%)
 
diff --git a/spec/core_functions/color/change/no_space.hrx b/spec/core_functions/color/change/no_space.hrx
index 52537c87d..e92dd75ca 100644
--- a/spec/core_functions/color/change/no_space.hrx
+++ b/spec/core_functions/color/change/no_space.hrx
@@ -118,7 +118,7 @@ a {
 }
 
 <===> alpha/units/unknown/warning
-DEPRECATION WARNING: $alpha: Passing a unit other than % (0.5px) is deprecated.
+DEPRECATION WARNING [function-units]: $alpha: Passing a unit other than % (0.5px) is deprecated.
 
 To preserve current behavior: calc($alpha / 1px)
 
diff --git a/spec/core_functions/color/darken.hrx b/spec/core_functions/color/darken.hrx
index 284cdd726..96a9f8cfa 100644
--- a/spec/core_functions/color/darken.hrx
+++ b/spec/core_functions/color/darken.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -100%)
 color.adjust($color, $lightness: -100%)
@@ -42,7 +42,7 @@ a {
 }
 
 <===> max_remaining/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -53,7 +53,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -100%)
 color.adjust($color, $lightness: -50%)
@@ -77,7 +77,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -88,7 +88,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestion:
 
 color.adjust($color, $lightness: 0%)
 
@@ -111,7 +111,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -122,7 +122,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -28%)
 color.adjust($color, $lightness: -14%)
@@ -146,7 +146,7 @@ a {
 }
 
 <===> fraction/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -157,7 +157,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -1%)
 color.adjust($color, $lightness: -0.5%)
@@ -181,7 +181,7 @@ a {
 }
 
 <===> alpha/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -192,7 +192,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -100%)
 color.adjust($color, $lightness: -100%)
@@ -216,7 +216,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -227,7 +227,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -28%)
 color.adjust($color, $lightness: -14%)
@@ -280,7 +280,7 @@ Error: Only 2 arguments allowed, but 3 were passed.
 a {b: darken(1, 2)}
 
 <===> error/type/color/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -304,7 +304,7 @@ Error: $color: 1 is not a color.
 a {b: darken(red, blue)}
 
 <===> error/type/lightness/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -328,7 +328,7 @@ Error: $amount: blue is not a number.
 a {b: darken(red, -0.001)}
 
 <===> error/bounds/too_low/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -352,7 +352,7 @@ Error: $amount: Expected -0.001 to be within 0 and 100.
 a {b: darken(red, 100.001)}
 
 <===> error/bounds/too_high/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -376,7 +376,7 @@ Error: $amount: Expected 100.001 to be within 0 and 100.
 a {b: darken(color(srgb 1 1 1), 10%)}
 
 <===> error/non_legacy/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/desaturate.hrx b/spec/core_functions/color/desaturate.hrx
index 3240053da..9002fa828 100644
--- a/spec/core_functions/color/desaturate.hrx
+++ b/spec/core_functions/color/desaturate.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: desaturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: desaturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: -100%)
 color.adjust($color, $saturation: -100%)
@@ -42,7 +42,7 @@ a {
 }
 
 <===> max_remaining/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -53,7 +53,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: desaturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: desaturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: -100%)
 color.adjust($color, $saturation: -48%)
@@ -77,7 +77,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -88,7 +88,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: desaturate() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: desaturate() is deprecated. Suggestion:
 
 color.adjust($color, $saturation: 0%)
 
@@ -111,7 +111,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -122,7 +122,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: desaturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: desaturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: -29.606557377%)
 color.adjust($color, $saturation: -14%)
@@ -146,7 +146,7 @@ a {
 }
 
 <===> alpha/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -157,7 +157,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: desaturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: desaturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: -100%)
 color.adjust($color, $saturation: -100%)
@@ -181,7 +181,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -192,7 +192,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: desaturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: desaturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: -29.606557377%)
 color.adjust($color, $saturation: -14%)
@@ -262,7 +262,7 @@ Error: Missing argument $amount.
 a {b: desaturate(1, 2)}
 
 <===> error/type/color/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -286,7 +286,7 @@ Error: $color: 1 is not a color.
 a {b: desaturate(plum, blue)}
 
 <===> error/type/lightness/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -310,7 +310,7 @@ Error: $amount: blue is not a number.
 a {b: desaturate(plum, -0.001)}
 
 <===> error/bounds/too_low/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -334,7 +334,7 @@ Error: $amount: Expected -0.001 to be within 0 and 100.
 a {b: desaturate(plum, 100.001)}
 
 <===> error/bounds/too_high/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -358,7 +358,7 @@ Error: $amount: Expected 100.001 to be within 0 and 100.
 a {b: desaturate(color(srgb 1 1 1), 10%)}
 
 <===> error/non_legacy/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/fade_in.hrx b/spec/core_functions/color/fade_in.hrx
index a104f9943..78a29ccb9 100644
--- a/spec/core_functions/color/fade_in.hrx
+++ b/spec/core_functions/color/fade_in.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-in() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: fade-in() is deprecated. Suggestions:
 
 color.scale($color, $alpha: 100%)
 color.adjust($color, $alpha: 1)
@@ -42,7 +42,7 @@ a {
 }
 
 <===> max_remaining/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -53,7 +53,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-in() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: fade-in() is deprecated. Suggestions:
 
 color.scale($color, $alpha: 100%)
 color.adjust($color, $alpha: 0.5)
@@ -77,7 +77,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -88,7 +88,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-in() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: fade-in() is deprecated. Suggestion:
 
 color.adjust($color, $alpha: 0)
 
@@ -111,7 +111,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -122,7 +122,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-in() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: fade-in() is deprecated. Suggestions:
 
 color.scale($color, $alpha: 28%)
 color.adjust($color, $alpha: 0.14)
@@ -146,7 +146,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -157,7 +157,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-in() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: fade-in() is deprecated. Suggestions:
 
 color.scale($color, $alpha: 28%)
 color.adjust($color, $alpha: 0.14)
@@ -181,7 +181,7 @@ a {
 }
 
 <===> opacify/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -192,7 +192,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: opacify() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: opacify() is deprecated. Suggestions:
 
 color.scale($color, $alpha: 28%)
 color.adjust($color, $alpha: 0.14)
@@ -245,7 +245,7 @@ Error: Only 2 arguments allowed, but 3 were passed.
 a {b: fade-in(1, 0.1)}
 
 <===> error/type/color/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -269,7 +269,7 @@ Error: $color: 1 is not a color.
 a {b: fade-in(red, blue)}
 
 <===> error/type/alpha/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -293,7 +293,7 @@ Error: $amount: blue is not a number.
 a {b: fade-in(red, -0.001)}
 
 <===> error/bounds/too_low/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -317,7 +317,7 @@ Error: $amount: Expected -0.001 to be within 0 and 1.
 a {b: fade-in(red, 1.001)}
 
 <===> error/bounds/too_high/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -343,7 +343,7 @@ Error: $amount: Expected 1.001 to be within 0 and 1.
 a {b: fade-in(red, 50%)}
 
 <===> error/bounds/unit/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -367,7 +367,7 @@ Error: $amount: Expected 50% to be within 0 and 1.
 a {b: fade-in(color(srgb 1 1 1 / 0.1), 0.1)}
 
 <===> error/non_legacy/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/fade_out.hrx b/spec/core_functions/color/fade_out.hrx
index e72b27fe6..c01681b97 100644
--- a/spec/core_functions/color/fade_out.hrx
+++ b/spec/core_functions/color/fade_out.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-out() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: fade-out() is deprecated. Suggestions:
 
 color.scale($color, $alpha: -100%)
 color.adjust($color, $alpha: -1)
@@ -42,7 +42,7 @@ a {
 }
 
 <===> max_remaining/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -53,7 +53,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-out() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: fade-out() is deprecated. Suggestions:
 
 color.scale($color, $alpha: -100%)
 color.adjust($color, $alpha: -0.5)
@@ -77,7 +77,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -88,7 +88,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-out() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: fade-out() is deprecated. Suggestion:
 
 color.adjust($color, $alpha: 0)
 
@@ -111,7 +111,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -122,7 +122,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-out() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: fade-out() is deprecated. Suggestions:
 
 color.scale($color, $alpha: -28%)
 color.adjust($color, $alpha: -0.14)
@@ -146,7 +146,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -157,7 +157,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-out() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: fade-out() is deprecated. Suggestions:
 
 color.scale($color, $alpha: -28%)
 color.adjust($color, $alpha: -0.14)
@@ -181,7 +181,7 @@ a {
 }
 
 <===> transparentize/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -192,7 +192,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: transparentize() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: transparentize() is deprecated. Suggestions:
 
 color.scale($color, $alpha: -28%)
 color.adjust($color, $alpha: -0.14)
@@ -245,7 +245,7 @@ Error: Only 2 arguments allowed, but 3 were passed.
 a {b: fade-out(1, 0.1)}
 
 <===> error/type/color/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -269,7 +269,7 @@ Error: $color: 1 is not a color.
 a {b: fade-out(red, blue)}
 
 <===> error/type/alpha/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -293,7 +293,7 @@ Error: $amount: blue is not a number.
 a {b: fade-out(red, -0.001)}
 
 <===> error/bounds/too_low/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -317,7 +317,7 @@ Error: $amount: Expected -0.001 to be within 0 and 1.
 a {b: fade-out(red, 1.001)}
 
 <===> error/bounds/too_high/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -343,7 +343,7 @@ Error: $amount: Expected 1.001 to be within 0 and 1.
 a {b: fade-out(red, 50%)}
 
 <===> error/bounds/unit/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -367,7 +367,7 @@ Error: $amount: Expected 50% to be within 0 and 1.
 a {b: fade-out(color(srgb 1 1 1), 0.1)}
 
 <===> error/non_legacy/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/grayscale.hrx b/spec/core_functions/color/grayscale.hrx
index 80bb19f2c..ae0dd7fda 100644
--- a/spec/core_functions/color/grayscale.hrx
+++ b/spec/core_functions/color/grayscale.hrx
@@ -137,7 +137,7 @@ a {
 }
 
 <===> global/with_unquoted_calc/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.unquote instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -160,7 +160,7 @@ a {
 }
 
 <===> number/warning
-DEPRECATION WARNING: Passing a number (1) to color.grayscale() is deprecated.
+DEPRECATION WARNING [color-module-compat]: Passing a number (1) to color.grayscale() is deprecated.
 
 Recommendation: grayscale(1)
 
diff --git a/spec/core_functions/color/green.hrx b/spec/core_functions/color/green.hrx
index 3e06b6231..fc90d18f9 100644
--- a/spec/core_functions/color/green.hrx
+++ b/spec/core_functions/color/green.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
@@ -32,7 +32,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
@@ -56,7 +56,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
@@ -80,7 +80,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
diff --git a/spec/core_functions/color/hsl/four_args/out_of_gamut.hrx b/spec/core_functions/color/hsl/four_args/out_of_gamut.hrx
index c13e97827..a3ea06d14 100644
--- a/spec/core_functions/color/hsl/four_args/out_of_gamut.hrx
+++ b/spec/core_functions/color/hsl/four_args/out_of_gamut.hrx
@@ -47,7 +47,7 @@ a {
 }
 
 <===> saturation/degenerate/positive_infinity/warning
-DEPRECATION WARNING: $saturation: Passing a number without unit % (calc(infinity)) is deprecated.
+DEPRECATION WARNING [function-units]: $saturation: Passing a number without unit % (calc(infinity)) is deprecated.
 
 To preserve current behavior: $saturation * 1%
 
@@ -70,7 +70,7 @@ a {
 }
 
 <===> saturation/degenerate/negative_infinity/warning
-DEPRECATION WARNING: $saturation: Passing a number without unit % (calc(-infinity)) is deprecated.
+DEPRECATION WARNING [function-units]: $saturation: Passing a number without unit % (calc(-infinity)) is deprecated.
 
 To preserve current behavior: $saturation * 1%
 
@@ -93,7 +93,7 @@ a {
 }
 
 <===> saturation/degenerate/nan/warning
-DEPRECATION WARNING: $saturation: Passing a number without unit % (calc(NaN)) is deprecated.
+DEPRECATION WARNING [function-units]: $saturation: Passing a number without unit % (calc(NaN)) is deprecated.
 
 To preserve current behavior: $saturation * 1%
 
@@ -126,7 +126,7 @@ a {
 }
 
 <===> lightness/degenerate/positive_infinity/warning
-DEPRECATION WARNING: $lightness: Passing a number without unit % (calc(infinity)) is deprecated.
+DEPRECATION WARNING [function-units]: $lightness: Passing a number without unit % (calc(infinity)) is deprecated.
 
 To preserve current behavior: $lightness * 1%
 
@@ -149,7 +149,7 @@ a {
 }
 
 <===> lightness/degenerate/negative_infinity/warning
-DEPRECATION WARNING: $lightness: Passing a number without unit % (calc(-infinity)) is deprecated.
+DEPRECATION WARNING [function-units]: $lightness: Passing a number without unit % (calc(-infinity)) is deprecated.
 
 To preserve current behavior: $lightness * 1%
 
@@ -172,7 +172,7 @@ a {
 }
 
 <===> lightness/degenerate/nan/warning
-DEPRECATION WARNING: $lightness: Passing a number without unit % (calc(NaN)) is deprecated.
+DEPRECATION WARNING [function-units]: $lightness: Passing a number without unit % (calc(NaN)) is deprecated.
 
 To preserve current behavior: $lightness * 1%
 
diff --git a/spec/core_functions/color/hsl/one_arg/no_alpha.hrx b/spec/core_functions/color/hsl/one_arg/no_alpha.hrx
index a7f5257f7..235c96dc8 100644
--- a/spec/core_functions/color/hsl/one_arg/no_alpha.hrx
+++ b/spec/core_functions/color/hsl/one_arg/no_alpha.hrx
@@ -87,7 +87,7 @@ a {
 }
 
 <===> units/saturation/unitless/warning
-DEPRECATION WARNING: $saturation: Passing a number without unit % (50) is deprecated.
+DEPRECATION WARNING [function-units]: $saturation: Passing a number without unit % (50) is deprecated.
 
 To preserve current behavior: $saturation * 1%
 
@@ -110,7 +110,7 @@ a {
 }
 
 <===> units/lightness/unitless/warning
-DEPRECATION WARNING: $lightness: Passing a number without unit % (50) is deprecated.
+DEPRECATION WARNING [function-units]: $lightness: Passing a number without unit % (50) is deprecated.
 
 To preserve current behavior: $lightness * 1%
 
diff --git a/spec/core_functions/color/hsl/three_args/units.hrx b/spec/core_functions/color/hsl/three_args/units.hrx
index adfb5010d..e6a2c4cef 100644
--- a/spec/core_functions/color/hsl/three_args/units.hrx
+++ b/spec/core_functions/color/hsl/three_args/units.hrx
@@ -27,7 +27,7 @@ a {
 }
 
 <===> hue/unknown/warning
-DEPRECATION WARNING: $hue: Passing a unit other than deg (60in) is deprecated.
+DEPRECATION WARNING [function-units]: $hue: Passing a unit other than deg (60in) is deprecated.
 
 To preserve current behavior: calc($hue / 1in)
 
@@ -60,7 +60,7 @@ a {
 }
 
 <===> saturation/unitless/warning
-DEPRECATION WARNING: $saturation: Passing a number without unit % (50) is deprecated.
+DEPRECATION WARNING [function-units]: $saturation: Passing a number without unit % (50) is deprecated.
 
 To preserve current behavior: $saturation * 1%
 
@@ -83,7 +83,7 @@ a {
 }
 
 <===> saturation/unknown/warning
-DEPRECATION WARNING: $saturation: Passing a number without unit % (50in) is deprecated.
+DEPRECATION WARNING [function-units]: $saturation: Passing a number without unit % (50in) is deprecated.
 
 To preserve current behavior: calc($saturation / 1in * 1%)
 
@@ -106,7 +106,7 @@ a {
 }
 
 <===> lightness/unitless/warning
-DEPRECATION WARNING: $lightness: Passing a number without unit % (50) is deprecated.
+DEPRECATION WARNING [function-units]: $lightness: Passing a number without unit % (50) is deprecated.
 
 To preserve current behavior: $lightness * 1%
 
@@ -129,7 +129,7 @@ a {
 }
 
 <===> lightness/unknown/warning
-DEPRECATION WARNING: $lightness: Passing a number without unit % (50in) is deprecated.
+DEPRECATION WARNING [function-units]: $lightness: Passing a number without unit % (50in) is deprecated.
 
 To preserve current behavior: calc($lightness / 1in * 1%)
 
diff --git a/spec/core_functions/color/hue.hrx b/spec/core_functions/color/hue.hrx
index 586390ee5..95ac5108b 100644
--- a/spec/core_functions/color/hue.hrx
+++ b/spec/core_functions/color/hue.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -32,7 +32,7 @@ a {
 }
 
 <===> above_max/warning
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -56,7 +56,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -80,7 +80,7 @@ a {
 }
 
 <===> negative/warning
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -104,7 +104,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -128,7 +128,7 @@ a {
 }
 
 <===> fraction/warning
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -152,7 +152,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
diff --git a/spec/core_functions/color/hwb/three_args/units.hrx b/spec/core_functions/color/hwb/three_args/units.hrx
index 7e6f17ec5..a874abf39 100644
--- a/spec/core_functions/color/hwb/three_args/units.hrx
+++ b/spec/core_functions/color/hwb/three_args/units.hrx
@@ -30,7 +30,7 @@ a {
 }
 
 <===> hue/non_angle/warning
-DEPRECATION WARNING: $hue: Passing a unit other than deg (1in) is deprecated.
+DEPRECATION WARNING [function-units]: $hue: Passing a unit other than deg (1in) is deprecated.
 
 To preserve current behavior: calc($hue / 1in)
 
diff --git a/spec/core_functions/color/invert/error.hrx b/spec/core_functions/color/invert/error.hrx
index 891e79daa..a75f6bf28 100644
--- a/spec/core_functions/color/invert/error.hrx
+++ b/spec/core_functions/color/invert/error.hrx
@@ -51,7 +51,7 @@ Error: Only one argument may be passed to the plain-CSS invert() function.
 a {b: invert(c)}
 
 <===> global/type/color/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -75,7 +75,7 @@ Error: $color: c is not a color.
 a {b: invert(rgb(none 10 20))}
 
 <===> missing/legacy/same/implicit/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -99,7 +99,7 @@ Error: $red: Because the CSS working group is still deciding on the best behavio
 a {b: invert(hsl(0 40% none), $space: hsl)}
 
 <===> missing/legacy/same/explicit/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -123,7 +123,7 @@ Error: $lightness: Because the CSS working group is still deciding on the best b
 a {b: invert(hwb(none 10% 20%), $space: hwb)}
 
 <===> missing/legacy/same/hwb_hue/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -147,7 +147,7 @@ Error: $hue: Because the CSS working group is still deciding on the best behavio
 a {b: invert(rgb(10 none 20), $space: xyz)}
 
 <===> missing/legacy/analogous/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -171,7 +171,7 @@ Error: $y: Because the CSS working group is still deciding on the best behavior,
 a {b: invert(grey, $space: hsl)}
 
 <===> missing/legacy/powerless/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -195,7 +195,7 @@ Error: $hue: Because the CSS working group is still deciding on the best behavio
 a {b: invert(color(srgb none 0.1 0.2), $space: srgb)}
 
 <===> missing/modern/same/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -219,7 +219,7 @@ Error: $red: Because the CSS working group is still deciding on the best behavio
 a {b: invert(color(rec2020 0.1 none 0.2), $space: xyz)}
 
 <===> missing/modern/analogous/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -243,7 +243,7 @@ Error: $y: Because the CSS working group is still deciding on the best behavior,
 a {b: invert(color(rec2020 0.4 0.4 0.4), $space: lch)}
 
 <===> missing/modern/powerless/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/invert/global.hrx b/spec/core_functions/color/invert/global.hrx
index 82c3c9c1b..3cb2056e2 100644
--- a/spec/core_functions/color/invert/global.hrx
+++ b/spec/core_functions/color/invert/global.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> legacy/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -29,7 +29,7 @@ a {
 }
 
 <===> modern/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -81,7 +81,7 @@ a {
 }
 
 <===> with_unquoted_calc/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.unquote instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/invert/legacy.hrx b/spec/core_functions/color/invert/legacy.hrx
index b3720d923..6fae26330 100644
--- a/spec/core_functions/color/invert/legacy.hrx
+++ b/spec/core_functions/color/invert/legacy.hrx
@@ -236,7 +236,7 @@ a {
 }
 
 <===> units/weight/unitless/warning
-DEPRECATION WARNING: $weight: Passing a number without unit % (10) is deprecated.
+DEPRECATION WARNING [function-units]: $weight: Passing a number without unit % (10) is deprecated.
 
 To preserve current behavior: $weight * 1%
 
@@ -260,7 +260,7 @@ a {
 }
 
 <===> units/weight/unknown/warning
-DEPRECATION WARNING: $weight: Passing a number without unit % (10px) is deprecated.
+DEPRECATION WARNING [function-units]: $weight: Passing a number without unit % (10px) is deprecated.
 
 To preserve current behavior: calc($weight / 1px * 1%)
 
diff --git a/spec/core_functions/color/invert/number.hrx b/spec/core_functions/color/invert/number.hrx
index 78daa6edd..f77fec6c5 100644
--- a/spec/core_functions/color/invert/number.hrx
+++ b/spec/core_functions/color/invert/number.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a number (1) to color.invert() is deprecated.
+DEPRECATION WARNING [color-module-compat]: Passing a number (1) to color.invert() is deprecated.
 
 Recommendation: invert(1)
 
diff --git a/spec/core_functions/color/lighten.hrx b/spec/core_functions/color/lighten.hrx
index c0e7edf74..b6ed8b3c5 100644
--- a/spec/core_functions/color/lighten.hrx
+++ b/spec/core_functions/color/lighten.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: lighten() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: lighten() is deprecated. Suggestions:
 
 color.scale($color, $lightness: 100%)
 color.adjust($color, $lightness: 100%)
@@ -42,7 +42,7 @@ a {
 }
 
 <===> max_remaining/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -53,7 +53,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: lighten() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: lighten() is deprecated. Suggestions:
 
 color.scale($color, $lightness: 100%)
 color.adjust($color, $lightness: 50%)
@@ -77,7 +77,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -88,7 +88,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: lighten() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: lighten() is deprecated. Suggestion:
 
 color.adjust($color, $lightness: 0%)
 
@@ -111,7 +111,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -122,7 +122,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: lighten() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: lighten() is deprecated. Suggestions:
 
 color.scale($color, $lightness: 28%)
 color.adjust($color, $lightness: 14%)
@@ -146,7 +146,7 @@ a {
 }
 
 <===> fraction/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -157,7 +157,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: lighten() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: lighten() is deprecated. Suggestions:
 
 color.scale($color, $lightness: 1%)
 color.adjust($color, $lightness: 0.5%)
@@ -181,7 +181,7 @@ a {
 }
 
 <===> alpha/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -192,7 +192,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: lighten() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: lighten() is deprecated. Suggestions:
 
 color.scale($color, $lightness: 100%)
 color.adjust($color, $lightness: 100%)
@@ -216,7 +216,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -227,7 +227,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: lighten() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: lighten() is deprecated. Suggestions:
 
 color.scale($color, $lightness: 28%)
 color.adjust($color, $lightness: 14%)
@@ -280,7 +280,7 @@ Error: Only 2 arguments allowed, but 3 were passed.
 a {b: lighten(1, 2)}
 
 <===> error/type/color/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -304,7 +304,7 @@ Error: $color: 1 is not a color.
 a {b: lighten(red, blue)}
 
 <===> error/type/lightness/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -328,7 +328,7 @@ Error: $amount: blue is not a number.
 a {b: lighten(red, -0.001)}
 
 <===> error/bounds/too_low/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -352,7 +352,7 @@ Error: $amount: Expected -0.001 to be within 0 and 100.
 a {b: lighten(red, 100.001)}
 
 <===> error/bounds/too_high/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -376,7 +376,7 @@ Error: $amount: Expected 100.001 to be within 0 and 100.
 a {b: lighten(color(srgb 0 0 0), 10%)}
 
 <===> error/non_legacy/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/lightness.hrx b/spec/core_functions/color/lightness.hrx
index 5de0f4f1a..4b5b0bc01 100644
--- a/spec/core_functions/color/lightness.hrx
+++ b/spec/core_functions/color/lightness.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: color.lightness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.lightness() is deprecated. Suggestion:
 
 color.channel($color, "lightness", $space: hsl)
 
@@ -32,7 +32,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: color.lightness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.lightness() is deprecated. Suggestion:
 
 color.channel($color, "lightness", $space: hsl)
 
@@ -56,7 +56,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: color.lightness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.lightness() is deprecated. Suggestion:
 
 color.channel($color, "lightness", $space: hsl)
 
@@ -80,7 +80,7 @@ a {
 }
 
 <===> fraction/warning
-DEPRECATION WARNING: color.lightness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.lightness() is deprecated. Suggestion:
 
 color.channel($color, "lightness", $space: hsl)
 
@@ -104,7 +104,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: color.lightness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.lightness() is deprecated. Suggestion:
 
 color.channel($color, "lightness", $space: hsl)
 
diff --git a/spec/core_functions/color/mix/error.hrx b/spec/core_functions/color/mix/error.hrx
index d5579ba18..eadcfe192 100644
--- a/spec/core_functions/color/mix/error.hrx
+++ b/spec/core_functions/color/mix/error.hrx
@@ -36,7 +36,7 @@ Error: Missing argument $color2.
 a {b: mix(lch(20% -20 0), red)}
 
 <===> null_method/non_legacy/color1/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -60,7 +60,7 @@ Error: $color1: To use color.mix() with non-legacy color lch(20% 0 0deg), you mu
 a {b: mix(red, lch(20% -20 0))}
 
 <===> null_method/non_legacy/color2/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -84,7 +84,7 @@ Error: $color2: To use color.mix() with non-legacy color lch(20% 0 0deg), you mu
 a {b: mix(red, blue, $method: brighter)}
 
 <===> color_interpolation_method/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -108,7 +108,7 @@ Error: $method: Unknown color space "brighter".
 a {b: mix(red, blue, $method: hsl 1)}
 
 <===> interpolation/number/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -145,7 +145,7 @@ Error: Positional arguments must come before keyword arguments.
 a {b: mix(red, blue, $method: hsl/longer/hue)}
 
 <===> interpolation_list/slash/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -169,7 +169,7 @@ Error: $method: Unknown color space "hsl/longer/hue".
 a {b: mix(red, blue, $method: "hsl longer hue")}
 
 <===> interpolation_list/quoted/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -193,7 +193,7 @@ Error: $method: Expected "hsl longer hue" to be an unquoted string.
 a {b: mix(red, blue, $method: hsl longer shade)}
 
 <===> invalid_method/wrong_hue_keyword/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -219,7 +219,7 @@ Error: $method: Expected unquoted string "hue" at the end of (hsl longer shade),
 a {b: mix(red, blue, $method: hsl specified hue)}
 
 <===> invalid_method/unsupported/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -269,7 +269,7 @@ Error: Expected expression.
 a {b: mix(red, blue, $method: lch longerhue)}
 
 <===> unknown_interpolation/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -293,7 +293,7 @@ Error: $method: Unknown hue interpolation method longerhue.
 a {b: mix(red, blue, $method: srgb longer hue)}
 
 <===> rectangular_space_with_method/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -317,7 +317,7 @@ Error: $method: Hue interpolation method "HueInterpolationMethod.longer hue" may
 a {b: mix(red, blue, $method: lch decreasing)}
 
 <===> missing_hue_string/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -341,7 +341,7 @@ Error: $method: Expected unquoted string "hue" after (lch decreasing).
 a {b: mix(red, blue, $method: lch (decreasing hue))}
 
 <===> parentheses/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -365,7 +365,7 @@ Error: $method: (decreasing hue) is not a string.
 a {b: mix(1, blue)}
 
 <===> type/color1/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -389,7 +389,7 @@ Error: $color1: 1 is not a color.
 a {b: mix(red, 1)}
 
 <===> type/color2/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -413,7 +413,7 @@ Error: $color2: 1 is not a color.
 a {b: mix(red, blue, green)}
 
 <===> type/weight/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -437,7 +437,7 @@ Error: $weight: green is not a number.
 a {b: mix(red, blue, -0.001%)}
 
 <===> bounds/too_low/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -461,7 +461,7 @@ Error: $weight: Expected -0.001% to be within 0% and 100%.
 a {b: mix(red, blue, 100.001%)}
 
 <===> bounds/too_high/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/mix/units.hrx b/spec/core_functions/color/mix/units.hrx
index 75718126b..2f6f0b53e 100644
--- a/spec/core_functions/color/mix/units.hrx
+++ b/spec/core_functions/color/mix/units.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> weight/unitless/warning
-DEPRECATION WARNING: $weight: Passing a number without unit % (50) is deprecated.
+DEPRECATION WARNING [function-units]: $weight: Passing a number without unit % (50) is deprecated.
 
 To preserve current behavior: $weight * 1%
 
@@ -32,7 +32,7 @@ a {
 }
 
 <===> weight/unknown/warning
-DEPRECATION WARNING: $weight: Passing a number without unit % (50px) is deprecated.
+DEPRECATION WARNING [function-units]: $weight: Passing a number without unit % (50px) is deprecated.
 
 To preserve current behavior: calc($weight / 1px * 1%)
 
diff --git a/spec/core_functions/color/red.hrx b/spec/core_functions/color/red.hrx
index 690cc68c2..1bf5cc111 100644
--- a/spec/core_functions/color/red.hrx
+++ b/spec/core_functions/color/red.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
@@ -32,7 +32,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
@@ -56,7 +56,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
@@ -80,7 +80,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
diff --git a/spec/core_functions/color/saturate.hrx b/spec/core_functions/color/saturate.hrx
index e89a55903..a718e6908 100644
--- a/spec/core_functions/color/saturate.hrx
+++ b/spec/core_functions/color/saturate.hrx
@@ -86,7 +86,7 @@ a {
 }
 
 <===> two_args/max/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -97,7 +97,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: saturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: saturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: 100%)
 color.adjust($color, $saturation: 100%)
@@ -121,7 +121,7 @@ a {
 }
 
 <===> two_args/max_remaining/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -132,7 +132,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: saturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: saturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: 100%)
 color.adjust($color, $saturation: 53%)
@@ -156,7 +156,7 @@ a {
 }
 
 <===> two_args/min/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -167,7 +167,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: saturate() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: saturate() is deprecated. Suggestion:
 
 color.adjust($color, $saturation: 0%)
 
@@ -190,7 +190,7 @@ a {
 }
 
 <===> two_args/middle/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -201,7 +201,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: saturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: saturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: 26.5588235294%)
 color.adjust($color, $saturation: 14%)
@@ -225,7 +225,7 @@ a {
 }
 
 <===> two_args/alpha/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -236,7 +236,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: saturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: saturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: 100%)
 color.adjust($color, $saturation: 100%)
@@ -260,7 +260,7 @@ a {
 }
 
 <===> two_args/named/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -271,7 +271,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: saturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: saturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: 26.5588235294%)
 color.adjust($color, $saturation: 14%)
@@ -356,7 +356,7 @@ Error: Missing argument $amount.
 a {b: saturate(1, 2)}
 
 <===> error/two_args/type/color/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -380,7 +380,7 @@ Error: $color: 1 is not a color.
 a {b: saturate(plum, blue)}
 
 <===> error/two_args/type/lightness/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -404,7 +404,7 @@ Error: $amount: blue is not a number.
 a {b: saturate(plum, -0.001)}
 
 <===> error/two_args/bounds/too_low/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -428,7 +428,7 @@ Error: $amount: Expected -0.001 to be within 0 and 100.
 a {b: saturate(plum, 100.001)}
 
 <===> error/two_args/bounds/too_high/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -452,7 +452,7 @@ Error: $amount: Expected 100.001 to be within 0 and 100.
 a {b: saturate(color(srgb 1 1 1), 10%)}
 
 <===> error/non_legacy/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/saturation.hrx b/spec/core_functions/color/saturation.hrx
index c7c5c4b66..9de6299bb 100644
--- a/spec/core_functions/color/saturation.hrx
+++ b/spec/core_functions/color/saturation.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: color.saturation() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.saturation() is deprecated. Suggestion:
 
 color.channel($color, "saturation", $space: hsl)
 
@@ -32,7 +32,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: color.saturation() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.saturation() is deprecated. Suggestion:
 
 color.channel($color, "saturation", $space: hsl)
 
@@ -56,7 +56,7 @@ a {
 }
 
 <===> middle/warning
-DEPRECATION WARNING: color.saturation() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.saturation() is deprecated. Suggestion:
 
 color.channel($color, "saturation", $space: hsl)
 
@@ -80,7 +80,7 @@ a {
 }
 
 <===> fraction/warning
-DEPRECATION WARNING: color.saturation() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.saturation() is deprecated. Suggestion:
 
 color.channel($color, "saturation", $space: hsl)
 
@@ -104,7 +104,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: color.saturation() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.saturation() is deprecated. Suggestion:
 
 color.channel($color, "saturation", $space: hsl)
 
diff --git a/spec/core_functions/color/scale/global.hrx b/spec/core_functions/color/scale/global.hrx
index 8ff5a61a6..1305c2d7a 100644
--- a/spec/core_functions/color/scale/global.hrx
+++ b/spec/core_functions/color/scale/global.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> legacy/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.scale instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -29,7 +29,7 @@ a {
 }
 
 <===> non_legacy/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.scale instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/color/whiteness.hrx b/spec/core_functions/color/whiteness.hrx
index 034423e94..eb55de705 100644
--- a/spec/core_functions/color/whiteness.hrx
+++ b/spec/core_functions/color/whiteness.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> max/warning
-DEPRECATION WARNING: color.whiteness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.whiteness() is deprecated. Suggestion:
 
 color.channel($color, "whiteness", $space: hwb)
 
@@ -32,7 +32,7 @@ a {
 }
 
 <===> min/warning
-DEPRECATION WARNING: color.whiteness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.whiteness() is deprecated. Suggestion:
 
 color.channel($color, "whiteness", $space: hwb)
 
@@ -56,7 +56,7 @@ a {
 }
 
 <===> middle/zero_blackness/warning
-DEPRECATION WARNING: color.whiteness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.whiteness() is deprecated. Suggestion:
 
 color.channel($color, "whiteness", $space: hwb)
 
@@ -80,7 +80,7 @@ a {
 }
 
 <===> middle/half_blackness/warning
-DEPRECATION WARNING: color.whiteness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.whiteness() is deprecated. Suggestion:
 
 color.channel($color, "whiteness", $space: hwb)
 
@@ -104,7 +104,7 @@ a {
 }
 
 <===> middle/high_blackness/warning
-DEPRECATION WARNING: color.whiteness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.whiteness() is deprecated. Suggestion:
 
 color.channel($color, "whiteness", $space: hwb)
 
@@ -128,7 +128,7 @@ a {
 }
 
 <===> fraction/warning
-DEPRECATION WARNING: color.whiteness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.whiteness() is deprecated. Suggestion:
 
 color.channel($color, "whiteness", $space: hwb)
 
@@ -152,7 +152,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: color.whiteness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.whiteness() is deprecated. Suggestion:
 
 color.channel($color, "whiteness", $space: hwb)
 
diff --git a/spec/core_functions/global/color/alpha.hrx b/spec/core_functions/global/color/alpha.hrx
index fae5c83c8..7aa74d5b4 100644
--- a/spec/core_functions/global/color/alpha.hrx
+++ b/spec/core_functions/global/color/alpha.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.alpha instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/color/blue.hrx b/spec/core_functions/global/color/blue.hrx
index 7f6321cf0..26fb465df 100644
--- a/spec/core_functions/global/color/blue.hrx
+++ b/spec/core_functions/global/color/blue.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.blue instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
diff --git a/spec/core_functions/global/color/change.hrx b/spec/core_functions/global/color/change.hrx
index ecd384cc1..bb0ac8a49 100644
--- a/spec/core_functions/global/color/change.hrx
+++ b/spec/core_functions/global/color/change.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.change instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/color/complement.hrx b/spec/core_functions/global/color/complement.hrx
index c6bbca3cc..b6ba02cae 100644
--- a/spec/core_functions/global/color/complement.hrx
+++ b/spec/core_functions/global/color/complement.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.complement instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/color/darken.hrx b/spec/core_functions/global/color/darken.hrx
index b3d361560..71bdb99d6 100644
--- a/spec/core_functions/global/color/darken.hrx
+++ b/spec/core_functions/global/color/darken.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -12.4390243902%)
 color.adjust($color, $lightness: -10%)
diff --git a/spec/core_functions/global/color/desaturate.hrx b/spec/core_functions/global/color/desaturate.hrx
index f77559581..5f9c8ab1f 100644
--- a/spec/core_functions/global/color/desaturate.hrx
+++ b/spec/core_functions/global/color/desaturate.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: desaturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: desaturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: -14.7058823529%)
 color.adjust($color, $saturation: -10%)
diff --git a/spec/core_functions/global/color/error.hrx b/spec/core_functions/global/color/error.hrx
index 5ca46294d..397ea0290 100644
--- a/spec/core_functions/global/color/error.hrx
+++ b/spec/core_functions/global/color/error.hrx
@@ -2,7 +2,7 @@
 a {b: lighten(red, -0.001)}
 
 <===> too_low/lighten/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -26,7 +26,7 @@ Error: $amount: Expected -0.001 to be within 0 and 100.
 a {b: darken(red, -0.001)}
 
 <===> too_low/darken/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -50,7 +50,7 @@ Error: $amount: Expected -0.001 to be within 0 and 100.
 a {b: saturate(red, -0.001)}
 
 <===> too_low/saturate/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -74,7 +74,7 @@ Error: $amount: Expected -0.001 to be within 0 and 100.
 a {b: desaturate(red, -0.001)}
 
 <===> too_low/desaturate/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -98,7 +98,7 @@ Error: $amount: Expected -0.001 to be within 0 and 100.
 a {b: fade-in(red, -0.001)}
 
 <===> too_low/fade_in/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -122,7 +122,7 @@ Error: $amount: Expected -0.001 to be within 0 and 1.
 a {b: fade-out(red, -0.001)}
 
 <===> too_low/fade_out/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/color/fade-in.hrx b/spec/core_functions/global/color/fade-in.hrx
index b7ba00738..7a0b4b76c 100644
--- a/spec/core_functions/global/color/fade-in.hrx
+++ b/spec/core_functions/global/color/fade-in.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-in() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: fade-in() is deprecated. Suggestions:
 
 color.scale($color, $alpha: 60%)
 color.adjust($color, $alpha: 0.3)
diff --git a/spec/core_functions/global/color/fade-out.hrx b/spec/core_functions/global/color/fade-out.hrx
index 30578d3ea..413293250 100644
--- a/spec/core_functions/global/color/fade-out.hrx
+++ b/spec/core_functions/global/color/fade-out.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: fade-out() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: fade-out() is deprecated. Suggestions:
 
 color.scale($color, $alpha: -60%)
 color.adjust($color, $alpha: -0.3)
diff --git a/spec/core_functions/global/color/grayscale.hrx b/spec/core_functions/global/color/grayscale.hrx
index 858b8e842..8ac5e8e1c 100644
--- a/spec/core_functions/global/color/grayscale.hrx
+++ b/spec/core_functions/global/color/grayscale.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> with_color/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.grayscale instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/color/green.hrx b/spec/core_functions/global/color/green.hrx
index a3a2a5dba..58ba01ce0 100644
--- a/spec/core_functions/global/color/green.hrx
+++ b/spec/core_functions/global/color/green.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.green instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
diff --git a/spec/core_functions/global/color/hue.hrx b/spec/core_functions/global/color/hue.hrx
index 4ec136c7d..f3ea76c98 100644
--- a/spec/core_functions/global/color/hue.hrx
+++ b/spec/core_functions/global/color/hue.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.hue instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
diff --git a/spec/core_functions/global/color/invert.hrx b/spec/core_functions/global/color/invert.hrx
index 4f3b7e2f8..4af00e21a 100644
--- a/spec/core_functions/global/color/invert.hrx
+++ b/spec/core_functions/global/color/invert.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> with_color/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.invert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/color/lighten.hrx b/spec/core_functions/global/color/lighten.hrx
index 353cb3ba8..a28b48d40 100644
--- a/spec/core_functions/global/color/lighten.hrx
+++ b/spec/core_functions/global/color/lighten.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: lighten() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: lighten() is deprecated. Suggestions:
 
 color.scale($color, $lightness: 51%)
 color.adjust($color, $lightness: 10%)
diff --git a/spec/core_functions/global/color/lightness.hrx b/spec/core_functions/global/color/lightness.hrx
index 67de57543..0167b0213 100644
--- a/spec/core_functions/global/color/lightness.hrx
+++ b/spec/core_functions/global/color/lightness.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.lightness instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: lightness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: lightness() is deprecated. Suggestion:
 
 color.channel($color, "lightness", $space: hsl)
 
diff --git a/spec/core_functions/global/color/mix.hrx b/spec/core_functions/global/color/mix.hrx
index 3a8386d76..b4636adbb 100644
--- a/spec/core_functions/global/color/mix.hrx
+++ b/spec/core_functions/global/color/mix.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.mix instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/color/opacify.hrx b/spec/core_functions/global/color/opacify.hrx
index 4caf019d8..02bdccc36 100644
--- a/spec/core_functions/global/color/opacify.hrx
+++ b/spec/core_functions/global/color/opacify.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: opacify() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: opacify() is deprecated. Suggestions:
 
 color.scale($color, $alpha: 60%)
 color.adjust($color, $alpha: 0.3)
diff --git a/spec/core_functions/global/color/opacity.hrx b/spec/core_functions/global/color/opacity.hrx
index ee95428e8..f898ac593 100644
--- a/spec/core_functions/global/color/opacity.hrx
+++ b/spec/core_functions/global/color/opacity.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.opacity instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/color/red.hrx b/spec/core_functions/global/color/red.hrx
index b879062cb..dba2a29c0 100644
--- a/spec/core_functions/global/color/red.hrx
+++ b/spec/core_functions/global/color/red.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.red instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
diff --git a/spec/core_functions/global/color/saturate.hrx b/spec/core_functions/global/color/saturate.hrx
index e82f3e742..8fe6dbf85 100644
--- a/spec/core_functions/global/color/saturate.hrx
+++ b/spec/core_functions/global/color/saturate.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: saturate() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: saturate() is deprecated. Suggestions:
 
 color.scale($color, $saturation: 31.25%)
 color.adjust($color, $saturation: 10%)
diff --git a/spec/core_functions/global/color/saturation.hrx b/spec/core_functions/global/color/saturation.hrx
index 18aa51b27..faf231994 100644
--- a/spec/core_functions/global/color/saturation.hrx
+++ b/spec/core_functions/global/color/saturation.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.saturation instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: saturation() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: saturation() is deprecated. Suggestion:
 
 color.channel($color, "saturation", $space: hsl)
 
diff --git a/spec/core_functions/global/color/scale.hrx b/spec/core_functions/global/color/scale.hrx
index 4513dbdf3..d4b8f4700 100644
--- a/spec/core_functions/global/color/scale.hrx
+++ b/spec/core_functions/global/color/scale.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.scale instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/color/transparentize.hrx b/spec/core_functions/global/color/transparentize.hrx
index 091c0f74f..397447ecd 100644
--- a/spec/core_functions/global/color/transparentize.hrx
+++ b/spec/core_functions/global/color/transparentize.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: transparentize() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: transparentize() is deprecated. Suggestions:
 
 color.scale($color, $alpha: -60%)
 color.adjust($color, $alpha: -0.3)
diff --git a/spec/core_functions/global/list.hrx b/spec/core_functions/global/list.hrx
index 73105cdb3..cb70fa849 100644
--- a/spec/core_functions/global/list.hrx
+++ b/spec/core_functions/global/list.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> append/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.append instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -29,7 +29,7 @@ a {
 }
 
 <===> index/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.index instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -51,7 +51,7 @@ a {
 }
 
 <===> is-bracketed/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.is-bracketed instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -73,7 +73,7 @@ a {
 }
 
 <===> join/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.join instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -95,7 +95,7 @@ a {
 }
 
 <===> length/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.length instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -117,7 +117,7 @@ a {
 }
 
 <===> nth/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -139,7 +139,7 @@ a {
 }
 
 <===> list-separator/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.separator instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -161,7 +161,7 @@ a {
 }
 
 <===> set-nth/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.set-nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -183,7 +183,7 @@ a {
 }
 
 <===> zip/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.zip instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/map.hrx b/spec/core_functions/global/map.hrx
index f8a14c182..6029a3149 100644
--- a/spec/core_functions/global/map.hrx
+++ b/spec/core_functions/global/map.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> get/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use map.get instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -30,7 +30,7 @@ a {
 }
 
 <===> merge/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use map.merge instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -53,7 +53,7 @@ a {
 }
 
 <===> remove/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use map.remove instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -75,7 +75,7 @@ a {
 }
 
 <===> keys/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use map.keys instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -97,7 +97,7 @@ a {
 }
 
 <===> values/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use map.values instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -119,7 +119,7 @@ a {
 }
 
 <===> has_key/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use map.has-key instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/math.hrx b/spec/core_functions/global/math.hrx
index ef1aab534..278957ddf 100644
--- a/spec/core_functions/global/math.hrx
+++ b/spec/core_functions/global/math.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> percentage/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.percentage instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -39,7 +39,7 @@ a {
 }
 
 <===> ceil/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.ceil instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -61,7 +61,7 @@ a {
 }
 
 <===> floor/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.floor instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -113,7 +113,7 @@ a {
 }
 
 <===> random/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.random instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -135,7 +135,7 @@ a {
 }
 
 <===> unit/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.unit instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -157,7 +157,7 @@ a {
 }
 
 <===> unitless/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.is-unitless instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -179,7 +179,7 @@ a {
 }
 
 <===> comparable/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.compatible instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/meta.hrx b/spec/core_functions/global/meta.hrx
index 7a6b7e247..cd6f28eac 100644
--- a/spec/core_functions/global/meta.hrx
+++ b/spec/core_functions/global/meta.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> inspect/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.inspect instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -29,7 +29,7 @@ a {
 }
 
 <===> feature_exists/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.feature-exists instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -40,7 +40,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:7  root stylesheet
 
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
@@ -61,7 +61,7 @@ a {
 }
 
 <===> variable_exists/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.variable-exists instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -83,7 +83,7 @@ a {
 }
 
 <===> global_variable_exists/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.global-variable-exists instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -105,7 +105,7 @@ a {
 }
 
 <===> function_exists/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.function-exists instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -127,7 +127,7 @@ a {
 }
 
 <===> mixin_exists/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.mixin-exists instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -150,7 +150,7 @@ a {
 }
 
 <===> get_function/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.get-function instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -172,7 +172,7 @@ a {
 }
 
 <===> type_of/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.type-of instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -195,7 +195,7 @@ a {
 }
 
 <===> call/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.call instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -221,7 +221,7 @@ a {
 }
 
 <===> content_exists/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.content-exists instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -250,7 +250,7 @@ a {
 }
 
 <===> keywords/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.keywords instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/selector.hrx b/spec/core_functions/global/selector.hrx
index 978054531..6f7d064fe 100644
--- a/spec/core_functions/global/selector.hrx
+++ b/spec/core_functions/global/selector.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> nest/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use selector.nest instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -29,7 +29,7 @@ a {
 }
 
 <===> append/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use selector.append instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -51,7 +51,7 @@ a {
 }
 
 <===> replace/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use selector.replace instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -73,7 +73,7 @@ a {
 }
 
 <===> extend/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use selector.extend instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -95,7 +95,7 @@ a {
 }
 
 <===> unify/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use selector.unify instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -117,7 +117,7 @@ a {
 }
 
 <===> is_superselector/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use selector.is-superselector instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -139,7 +139,7 @@ a {
 }
 
 <===> simple_selectors/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use selector.simple-selectors instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -161,7 +161,7 @@ a {
 }
 
 <===> parse/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use selector.parse instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/global/string.hrx b/spec/core_functions/global/string.hrx
index 384e84ed9..4531c6f98 100644
--- a/spec/core_functions/global/string.hrx
+++ b/spec/core_functions/global/string.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> unquote/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.unquote instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -29,7 +29,7 @@ a {
 }
 
 <===> quote/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.quote instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -51,7 +51,7 @@ a {
 }
 
 <===> length/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.length instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -73,7 +73,7 @@ a {
 }
 
 <===> insert/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.insert instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -95,7 +95,7 @@ a {
 }
 
 <===> index/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.index instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -117,7 +117,7 @@ a {
 }
 
 <===> slice/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.slice instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -139,7 +139,7 @@ a {
 }
 
 <===> to_upper_case/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.to-upper-case instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -162,7 +162,7 @@ a {
 }
 
 <===> unique_id/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.unique-id instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/list/nth.hrx b/spec/core_functions/list/nth.hrx
index 1a1977b9c..42d1d0a7e 100644
--- a/spec/core_functions/list/nth.hrx
+++ b/spec/core_functions/list/nth.hrx
@@ -140,7 +140,7 @@ a {
 }
 
 <===> units/warning
-DEPRECATION WARNING: $n: Passing a number with unit px is deprecated.
+DEPRECATION WARNING [function-units]: $n: Passing a number with unit px is deprecated.
 
 To preserve current behavior: calc($n / 1px)
 
diff --git a/spec/core_functions/list/set_nth.hrx b/spec/core_functions/list/set_nth.hrx
index acf23ea78..741664c3b 100644
--- a/spec/core_functions/list/set_nth.hrx
+++ b/spec/core_functions/list/set_nth.hrx
@@ -158,7 +158,7 @@ a {
 }
 
 <===> units/warning
-DEPRECATION WARNING: $n: Passing a number with unit px is deprecated.
+DEPRECATION WARNING [function-units]: $n: Passing a number with unit px is deprecated.
 
 To preserve current behavior: calc($n / 1px)
 
diff --git a/spec/core_functions/math/abs.hrx b/spec/core_functions/math/abs.hrx
index ea9d61033..a95a4b76f 100644
--- a/spec/core_functions/math/abs.hrx
+++ b/spec/core_functions/math/abs.hrx
@@ -63,7 +63,7 @@ a {
 }
 
 <===> preserves_units/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(-7px, 4em)
 
diff --git a/spec/core_functions/math/ceil.hrx b/spec/core_functions/math/ceil.hrx
index ce673e665..bc4857543 100644
--- a/spec/core_functions/math/ceil.hrx
+++ b/spec/core_functions/math/ceil.hrx
@@ -52,7 +52,7 @@ a {
 }
 
 <===> preserves_units/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(7px, 4em)
 
diff --git a/spec/core_functions/math/comparable.hrx b/spec/core_functions/math/comparable.hrx
index f293f5daa..7a0c5fc10 100644
--- a/spec/core_functions/math/comparable.hrx
+++ b/spec/core_functions/math/comparable.hrx
@@ -63,7 +63,7 @@ a {
 }
 
 <===> unit/to_inverse/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1px)
 
diff --git a/spec/core_functions/math/floor.hrx b/spec/core_functions/math/floor.hrx
index 53765789a..515acf108 100644
--- a/spec/core_functions/math/floor.hrx
+++ b/spec/core_functions/math/floor.hrx
@@ -52,7 +52,7 @@ a {
 }
 
 <===> preserves_units/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(7px, 4em)
 
diff --git a/spec/core_functions/math/max.hrx b/spec/core_functions/math/max.hrx
index 99b8ef33a..c27643d53 100644
--- a/spec/core_functions/math/max.hrx
+++ b/spec/core_functions/math/max.hrx
@@ -99,7 +99,7 @@ a {
 }
 
 <===> global/modulo/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.max instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/math/min.hrx b/spec/core_functions/math/min.hrx
index 4c3dccbc3..2364f5231 100644
--- a/spec/core_functions/math/min.hrx
+++ b/spec/core_functions/math/min.hrx
@@ -99,7 +99,7 @@ a {
 }
 
 <===> global/modulo/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.min instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/math/random.hrx b/spec/core_functions/math/random.hrx
index e18ad0dce..9eeb98097 100644
--- a/spec/core_functions/math/random.hrx
+++ b/spec/core_functions/math/random.hrx
@@ -90,7 +90,7 @@ a {
 }
 
 <===> ignores_units/warning
-DEPRECATION WARNING: math.random() will no longer ignore $limit units (1px) in a future release.
+DEPRECATION WARNING [function-units]: math.random() will no longer ignore $limit units (1px) in a future release.
 
 Recommendation: math.random(math.div($limit, 1px)) * 1px
 
diff --git a/spec/core_functions/math/round.hrx b/spec/core_functions/math/round.hrx
index e690e06f4..efaff9de2 100644
--- a/spec/core_functions/math/round.hrx
+++ b/spec/core_functions/math/round.hrx
@@ -109,7 +109,7 @@ a {
 }
 
 <===> preserves_units/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(7px, 4em)
 
diff --git a/spec/core_functions/math/unit.hrx b/spec/core_functions/math/unit.hrx
index c30ae0f95..888ac02eb 100644
--- a/spec/core_functions/math/unit.hrx
+++ b/spec/core_functions/math/unit.hrx
@@ -47,7 +47,7 @@ a {
 }
 
 <===> one_denominator/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1px)
 
@@ -71,7 +71,7 @@ a {
 }
 
 <===> multiple_denominators/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(math.div(1, 1px), 3em), 4rad)
 
@@ -95,7 +95,7 @@ a {
 }
 
 <===> numerator_and_denominator/single/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px, 1em)
 
@@ -119,7 +119,7 @@ a {
 }
 
 <===> numerator_and_denominator/multiple/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1em, 1rad) or calc(1px * 1em / 1rad)
 
@@ -131,7 +131,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:17  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1em, 1rad), 1s) or calc(1px * 1em / 1rad / 1s)
 
diff --git a/spec/core_functions/math/unitless.hrx b/spec/core_functions/math/unitless.hrx
index 083a5b29d..1d4596d7b 100644
--- a/spec/core_functions/math/unitless.hrx
+++ b/spec/core_functions/math/unitless.hrx
@@ -30,7 +30,7 @@ a {
 }
 
 <===> denominator/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1px)
 
@@ -54,7 +54,7 @@ a {
 }
 
 <===> numerator_and_denominator/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px, 1em)
 
diff --git a/spec/core_functions/meta/call.hrx b/spec/core_functions/meta/call.hrx
index 4350b7e64..53afc8a8f 100644
--- a/spec/core_functions/meta/call.hrx
+++ b/spec/core_functions/meta/call.hrx
@@ -80,7 +80,7 @@ a {
 }
 
 <===> string/local/warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("a"))
 
@@ -102,7 +102,7 @@ a {
 }
 
 <===> string/built_in/warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("rgb"))
 
diff --git a/spec/core_functions/meta/feature_exists.hrx b/spec/core_functions/meta/feature_exists.hrx
index bc342c5a8..c9bad3dcc 100644
--- a/spec/core_functions/meta/feature_exists.hrx
+++ b/spec/core_functions/meta/feature_exists.hrx
@@ -14,7 +14,7 @@ a {
 }
 
 <===> global_variable_shadowing/warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
@@ -36,7 +36,7 @@ a {
 }
 
 <===> extend_selector_pseudoclass/warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
@@ -58,7 +58,7 @@ a {
 }
 
 <===> units_level_3/warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
@@ -80,7 +80,7 @@ a {
 }
 
 <===> at_error/warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
@@ -102,7 +102,7 @@ a {
 }
 
 <===> custom_property/warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
@@ -124,7 +124,7 @@ a {
 }
 
 <===> unknown/warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
@@ -146,7 +146,7 @@ a {
 }
 
 <===> dash_sensitive/warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
@@ -168,7 +168,7 @@ a {
 }
 
 <===> quote_insensitive/warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
@@ -190,7 +190,7 @@ a {
 }
 
 <===> named/warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
@@ -207,7 +207,7 @@ More info: https://sass-lang.com/d/feature-exists
 a {b: meta.feature-exists(1)}
 
 <===> error/type/error
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
diff --git a/spec/core_functions/meta/function_exists.hrx b/spec/core_functions/meta/function_exists.hrx
index 92582f107..4c67268d1 100644
--- a/spec/core_functions/meta/function_exists.hrx
+++ b/spec/core_functions/meta/function_exists.hrx
@@ -39,7 +39,7 @@ a {
 }
 
 <===> same_module/through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/core_functions/meta/get_function/same_module.hrx b/spec/core_functions/meta/get_function/same_module.hrx
index a10878443..4a5e74781 100644
--- a/spec/core_functions/meta/get_function/same_module.hrx
+++ b/spec/core_functions/meta/get_function/same_module.hrx
@@ -43,7 +43,7 @@ a {
 }
 
 <===> built_in/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.round instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -84,7 +84,7 @@ a {
 }
 
 <===> through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -113,7 +113,7 @@ a {
 }
 
 <===> plain_css/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.round instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/core_functions/meta/get_mixin/same_module.hrx b/spec/core_functions/meta/get_mixin/same_module.hrx
index 97ed9683c..24a8b9dbc 100644
--- a/spec/core_functions/meta/get_mixin/same_module.hrx
+++ b/spec/core_functions/meta/get_mixin/same_module.hrx
@@ -45,7 +45,7 @@ a {
 }
 
 <===> through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/core_functions/meta/global_variable_exists.hrx b/spec/core_functions/meta/global_variable_exists.hrx
index 682ce65ee..68af51ca1 100644
--- a/spec/core_functions/meta/global_variable_exists.hrx
+++ b/spec/core_functions/meta/global_variable_exists.hrx
@@ -39,7 +39,7 @@ a {
 }
 
 <===> same_module/through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/core_functions/meta/load_css/with.hrx b/spec/core_functions/meta/load_css/with.hrx
index 7e8e364d3..95f75ddb0 100644
--- a/spec/core_functions/meta/load_css/with.hrx
+++ b/spec/core_functions/meta/load_css/with.hrx
@@ -167,7 +167,7 @@ b {
 }
 
 <===> through_import/direct/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -200,7 +200,7 @@ b {
 }
 
 <===> through_import/transitive/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -211,7 +211,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     _loaded.scss 1:9  load-css()
     input.scss 2:1    root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/core_functions/meta/mixin_exists.hrx b/spec/core_functions/meta/mixin_exists.hrx
index d378905aa..064357026 100644
--- a/spec/core_functions/meta/mixin_exists.hrx
+++ b/spec/core_functions/meta/mixin_exists.hrx
@@ -39,7 +39,7 @@ a {
 }
 
 <===> same_module/through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/core_functions/meta/module_functions.hrx b/spec/core_functions/meta/module_functions.hrx
index 18bf4f1a9..71d62ea9f 100644
--- a/spec/core_functions/meta/module_functions.hrx
+++ b/spec/core_functions/meta/module_functions.hrx
@@ -111,7 +111,7 @@ a {
 }
 
 <===> through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/core_functions/meta/module_mixins.hrx b/spec/core_functions/meta/module_mixins.hrx
index 91c8c21ed..0d70fb437 100644
--- a/spec/core_functions/meta/module_mixins.hrx
+++ b/spec/core_functions/meta/module_mixins.hrx
@@ -139,7 +139,7 @@ a {
 }
 
 <===> through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/core_functions/meta/module_variables.hrx b/spec/core_functions/meta/module_variables.hrx
index bb29218e9..6183a1ff9 100644
--- a/spec/core_functions/meta/module_variables.hrx
+++ b/spec/core_functions/meta/module_variables.hrx
@@ -87,7 +87,7 @@ a {
 }
 
 <===> through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/core_functions/meta/variable_exists.hrx b/spec/core_functions/meta/variable_exists.hrx
index 1db7d0cb3..96610383a 100644
--- a/spec/core_functions/meta/variable_exists.hrx
+++ b/spec/core_functions/meta/variable_exists.hrx
@@ -65,7 +65,7 @@ a {
 }
 
 <===> through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/core_functions/modules/color/blue.hrx b/spec/core_functions/modules/color/blue.hrx
index 9df6f9a68..4149f905b 100644
--- a/spec/core_functions/modules/color/blue.hrx
+++ b/spec/core_functions/modules/color/blue.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
diff --git a/spec/core_functions/modules/color/css_overloads.hrx b/spec/core_functions/modules/color/css_overloads.hrx
index 89af6b73a..92380d55d 100644
--- a/spec/core_functions/modules/color/css_overloads.hrx
+++ b/spec/core_functions/modules/color/css_overloads.hrx
@@ -14,7 +14,7 @@ a {
 }
 
 <===> grayscale/warning
-DEPRECATION WARNING: Passing a number (1) to color.grayscale() is deprecated.
+DEPRECATION WARNING [color-module-compat]: Passing a number (1) to color.grayscale() is deprecated.
 
 Recommendation: grayscale(1)
 
@@ -36,7 +36,7 @@ a {
 }
 
 <===> invert/warning
-DEPRECATION WARNING: Passing a number (1) to color.invert() is deprecated.
+DEPRECATION WARNING [color-module-compat]: Passing a number (1) to color.invert() is deprecated.
 
 Recommendation: invert(1)
 
@@ -58,7 +58,7 @@ a {
 }
 
 <===> alpha/one_arg/warning
-DEPRECATION WARNING: Using color.alpha() for a Microsoft filter is deprecated.
+DEPRECATION WARNING [color-module-compat]: Using color.alpha() for a Microsoft filter is deprecated.
 
 Recommendation: alpha(c=d)
 
@@ -80,7 +80,7 @@ a {
 }
 
 <===> alpha/multi_arg/warning
-DEPRECATION WARNING: Using color.alpha() for a Microsoft filter is deprecated.
+DEPRECATION WARNING [color-module-compat]: Using color.alpha() for a Microsoft filter is deprecated.
 
 Recommendation: alpha(c=d, e=f, g=h)
 
@@ -102,7 +102,7 @@ a {
 }
 
 <===> opacity/warning
-DEPRECATION WARNING: Passing a number (1 to color.opacity() is deprecated.
+DEPRECATION WARNING [color-module-compat]: Passing a number (1 to color.opacity() is deprecated.
 
 Recommendation: opacity(1)
 
diff --git a/spec/core_functions/modules/color/green.hrx b/spec/core_functions/modules/color/green.hrx
index 27ded54db..7a594d317 100644
--- a/spec/core_functions/modules/color/green.hrx
+++ b/spec/core_functions/modules/color/green.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
diff --git a/spec/core_functions/modules/color/hue.hrx b/spec/core_functions/modules/color/hue.hrx
index f4eb4e740..2d9b2994e 100644
--- a/spec/core_functions/modules/color/hue.hrx
+++ b/spec/core_functions/modules/color/hue.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
diff --git a/spec/core_functions/modules/color/lightness.hrx b/spec/core_functions/modules/color/lightness.hrx
index 80aeb9709..975dd8ddf 100644
--- a/spec/core_functions/modules/color/lightness.hrx
+++ b/spec/core_functions/modules/color/lightness.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: color.lightness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.lightness() is deprecated. Suggestion:
 
 color.channel($color, "lightness", $space: hsl)
 
diff --git a/spec/core_functions/modules/color/red.hrx b/spec/core_functions/modules/color/red.hrx
index 507854263..6f15ae554 100644
--- a/spec/core_functions/modules/color/red.hrx
+++ b/spec/core_functions/modules/color/red.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
diff --git a/spec/core_functions/modules/color/saturation.hrx b/spec/core_functions/modules/color/saturation.hrx
index 935027efa..751e82d39 100644
--- a/spec/core_functions/modules/color/saturation.hrx
+++ b/spec/core_functions/modules/color/saturation.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: color.saturation() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.saturation() is deprecated. Suggestion:
 
 color.channel($color, "saturation", $space: hsl)
 
diff --git a/spec/core_functions/selector/extend/complex/combinator_only.hrx b/spec/core_functions/selector/extend/complex/combinator_only.hrx
index 6195bb17f..a4ec18b6e 100644
--- a/spec/core_functions/selector/extend/complex/combinator_only.hrx
+++ b/spec/core_functions/selector/extend/complex/combinator_only.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> selector/warning
-DEPRECATION WARNING: $selector: + is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: + is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -31,7 +31,7 @@ a {
 }
 
 <===> extender/warning
-DEPRECATION WARNING: $extender: > is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: > is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/core_functions/selector/extend/complex/with_unification.hrx b/spec/core_functions/selector/extend/complex/with_unification.hrx
index 78d1cbc28..21628f3c0 100644
--- a/spec/core_functions/selector/extend/complex/with_unification.hrx
+++ b/spec/core_functions/selector/extend/complex/with_unification.hrx
@@ -74,7 +74,7 @@ a {
 }
 
 <===> leading_combinator/selector/warning
-DEPRECATION WARNING: $selector: > .c.x is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: > .c.x is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -97,7 +97,7 @@ a {
 }
 
 <===> leading_combinator/extender/warning
-DEPRECATION WARNING: $extender: + .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: + .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -120,7 +120,7 @@ a {
 }
 
 <===> leading_combinator/both/warning
-DEPRECATION WARNING: $selector: ~ .c.x is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: ~ .c.x is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -131,7 +131,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: $extender: + .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: + .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -154,7 +154,7 @@ a {
 }
 
 <===> trailing_combinator/selector/warning
-DEPRECATION WARNING: $selector: .c.x + is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: .c.x + is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -177,7 +177,7 @@ a {
 }
 
 <===> trailing_combinator/extender/child/warning
-DEPRECATION WARNING: $extender: .e > is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .e > is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -200,7 +200,7 @@ a {
 }
 
 <===> trailing_combinator/extender/sibling/warning
-DEPRECATION WARNING: $extender: .e ~ is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .e ~ is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -223,7 +223,7 @@ a {
 }
 
 <===> trailing_combinator/extender/next_sibling/warning
-DEPRECATION WARNING: $extender: .e + is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .e + is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -246,7 +246,7 @@ a {
 }
 
 <===> trailing_combinator/both/warning
-DEPRECATION WARNING: $selector: .c.x ~ is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: .c.x ~ is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -257,7 +257,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: $extender: .d > is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .d > is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -280,7 +280,7 @@ a {
 }
 
 <===> multiple_combinators/middle/selector/warning
-DEPRECATION WARNING: $selector: .c.x ~ ~ .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: .c.x ~ ~ .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -303,7 +303,7 @@ a {
 }
 
 <===> multiple_combinators/middle/extender/warning
-DEPRECATION WARNING: $extender: .d ~ + .e is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .d ~ + .e is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -326,7 +326,7 @@ a {
 }
 
 <===> multiple_combinators/leading/selector/warning
-DEPRECATION WARNING: $selector: > + .c.x is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: > + .c.x is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -349,7 +349,7 @@ a {
 }
 
 <===> multiple_combinators/leading/extender/warning
-DEPRECATION WARNING: $extender: + ~ .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: + ~ .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -372,7 +372,7 @@ a {
 }
 
 <===> multiple_combinators/trailing/selector/warning
-DEPRECATION WARNING: $selector: .c.x > ~ is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: .c.x > ~ is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -395,7 +395,7 @@ a {
 }
 
 <===> multiple_combinators/trailing/extender/warning
-DEPRECATION WARNING: $extender: .d + + is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .d + + is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/core_functions/selector/extend/complex/without_unification.hrx b/spec/core_functions/selector/extend/complex/without_unification.hrx
index 2414249ad..d41c9e683 100644
--- a/spec/core_functions/selector/extend/complex/without_unification.hrx
+++ b/spec/core_functions/selector/extend/complex/without_unification.hrx
@@ -74,7 +74,7 @@ a {
 }
 
 <===> leading_combinator/selector/warning
-DEPRECATION WARNING: $selector: > .c is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: > .c is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -97,7 +97,7 @@ a {
 }
 
 <===> leading_combinator/extender/warning
-DEPRECATION WARNING: $extender: + .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: + .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -120,7 +120,7 @@ a {
 }
 
 <===> leading_combinator/both/warning
-DEPRECATION WARNING: $selector: ~ .c is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: ~ .c is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -131,7 +131,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: $extender: + .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: + .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -154,7 +154,7 @@ a {
 }
 
 <===> trailing_combinator/selector/warning
-DEPRECATION WARNING: $selector: .c + is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: .c + is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -177,7 +177,7 @@ a {
 }
 
 <===> trailing_combinator/extender/child/warning
-DEPRECATION WARNING: $extender: .e > is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .e > is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -200,7 +200,7 @@ a {
 }
 
 <===> trailing_combinator/extender/sibling/warning
-DEPRECATION WARNING: $extender: .e ~ is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .e ~ is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -223,7 +223,7 @@ a {
 }
 
 <===> trailing_combinator/extender/next_sibling/warning
-DEPRECATION WARNING: $extender: .e + is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .e + is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -246,7 +246,7 @@ a {
 }
 
 <===> trailing_combinator/both/warning
-DEPRECATION WARNING: $selector: .c ~ is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: .c ~ is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -257,7 +257,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: $extender: .d > is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .d > is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -280,7 +280,7 @@ a {
 }
 
 <===> multiple_combinators/middle/selector/warning
-DEPRECATION WARNING: $selector: .c ~ ~ .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: .c ~ ~ .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -303,7 +303,7 @@ a {
 }
 
 <===> multiple_combinators/middle/extender/warning
-DEPRECATION WARNING: $extender: .d ~ + .e is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .d ~ + .e is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -326,7 +326,7 @@ a {
 }
 
 <===> multiple_combinators/leading/selector/warning
-DEPRECATION WARNING: $selector: > + .c is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: > + .c is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -349,7 +349,7 @@ a {
 }
 
 <===> multiple_combinators/leading/extender/warning
-DEPRECATION WARNING: $extender: + ~ .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: + ~ .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -372,7 +372,7 @@ a {
 }
 
 <===> multiple_combinators/trailing/selector/warning
-DEPRECATION WARNING: $selector: .c > ~ is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector: .c > ~ is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -395,7 +395,7 @@ a {
 }
 
 <===> multiple_combinators/trailing/extender/warning
-DEPRECATION WARNING: $extender: .d + + is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $extender: .d + + is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/core_functions/selector/is_superselector/complex/bogus.hrx b/spec/core_functions/selector/is_superselector/complex/bogus.hrx
index fbbfc0e11..6cfa5e9d5 100644
--- a/spec/core_functions/selector/is_superselector/complex/bogus.hrx
+++ b/spec/core_functions/selector/is_superselector/complex/bogus.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> super/warning
-DEPRECATION WARNING: $super: > c is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $super: > c is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -31,7 +31,7 @@ a {
 }
 
 <===> sub/warning
-DEPRECATION WARNING: $sub: d + ~ c is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $sub: d + ~ c is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/core_functions/selector/unify/complex/combinators/initial.hrx b/spec/core_functions/selector/unify/complex/combinators/initial.hrx
index 1f2b6cd2d..e70a60c11 100644
--- a/spec/core_functions/selector/unify/complex/combinators/initial.hrx
+++ b/spec/core_functions/selector/unify/complex/combinators/initial.hrx
@@ -15,7 +15,7 @@ a {
 }
 
 <===> only_one/selector1/warning
-DEPRECATION WARNING: $selector1: > .c is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector1: > .c is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -38,7 +38,7 @@ a {
 }
 
 <===> only_one/selector2/warning
-DEPRECATION WARNING: $selector2: ~ .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector2: ~ .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -61,7 +61,7 @@ a {
 }
 
 <===> same/warning
-DEPRECATION WARNING: $selector1: + .c is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector1: + .c is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -72,7 +72,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: $selector2: + .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector2: + .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -92,7 +92,7 @@ a {b: selector.unify("+ ~ > .c", "> + ~ > > .d")}
 <===> supersequence/contiguous/output.css
 
 <===> supersequence/contiguous/warning
-DEPRECATION WARNING: $selector1: + ~ > .c is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector1: + ~ > .c is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -103,7 +103,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: $selector2: > + ~ > > .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector2: > + ~ > > .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -123,7 +123,7 @@ a {b: selector.unify("+ ~ > .c", "+ > ~ ~ > .d")}
 <===> supersequence/non_contiguous/output.css
 
 <===> supersequence/non_contiguous/warning
-DEPRECATION WARNING: $selector1: + ~ > .c is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector1: + ~ > .c is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -134,7 +134,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: $selector2: + > ~ ~ > .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector2: + > ~ ~ > .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -158,7 +158,7 @@ a {
 }
 
 <===> different/warning
-DEPRECATION WARNING: $selector1: + ~ > .c is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector1: + ~ > .c is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -169,7 +169,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 3:20  root stylesheet
 
-DEPRECATION WARNING: $selector2: + > ~ ~ .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector2: + > ~ ~ .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/core_functions/selector/unify/complex/combinators/multiple.hrx b/spec/core_functions/selector/unify/complex/combinators/multiple.hrx
index e1393fd27..eea9ce498 100644
--- a/spec/core_functions/selector/unify/complex/combinators/multiple.hrx
+++ b/spec/core_functions/selector/unify/complex/combinators/multiple.hrx
@@ -23,7 +23,7 @@ a {b: selector.unify(".c + ~ > .d", ".e + ~ > .f")}
 <===> in_a_row/same/output.css
 
 <===> in_a_row/same/warning
-DEPRECATION WARNING: $selector1: .c + ~ > .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector1: .c + ~ > .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -34,7 +34,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: $selector2: .e + ~ > .f is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector2: .e + ~ > .f is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -54,7 +54,7 @@ a {b: selector.unify(".c + ~ > .d", ".e > + ~ > > .f")}
 <===> in_a_row/supersequence/contiguous/output.css
 
 <===> in_a_row/supersequence/contiguous/warning
-DEPRECATION WARNING: $selector1: .c + ~ > .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector1: .c + ~ > .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -65,7 +65,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: $selector2: .e > + ~ > > .f is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector2: .e > + ~ > > .f is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -85,7 +85,7 @@ a {b: selector.unify(".c + ~ > .d", ".e + > ~ ~ > .f")}
 <===> in_a_row/supersequence/non_contiguous/output.css
 
 <===> in_a_row/supersequence/non_contiguous/warning
-DEPRECATION WARNING: $selector1: .c + ~ > .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector1: .c + ~ > .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -96,7 +96,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: $selector2: .e + > ~ ~ > .f is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector2: .e + > ~ ~ > .f is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -120,7 +120,7 @@ a {
 }
 
 <===> in_a_row/different/warning
-DEPRECATION WARNING: $selector1: .c + ~ > .d is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector1: .c + ~ > .d is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -131,7 +131,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 3:20  root stylesheet
 
-DEPRECATION WARNING: $selector2: .e + > ~ ~ .f is not valid CSS.
+DEPRECATION WARNING [bogus-combinators]: $selector2: .e + > ~ ~ .f is not valid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/css/custom_properties/name_interpolation.hrx b/spec/css/custom_properties/name_interpolation.hrx
index 985d38360..2f2e04fc8 100644
--- a/spec/css/custom_properties/name_interpolation.hrx
+++ b/spec/css/custom_properties/name_interpolation.hrx
@@ -64,7 +64,7 @@ a {
 }
 
 <===> import_nesting_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/css/font-face.hrx b/spec/css/font-face.hrx
index 462eac29c..a6a1f5c4c 100644
--- a/spec/css/font-face.hrx
+++ b/spec/css/font-face.hrx
@@ -55,7 +55,7 @@ a b c {
 }
 
 <===> bubble/deeply-nested/warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
@@ -89,7 +89,7 @@ c {
 }
 
 <===> bubble/loaded/import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -99,7 +99,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 2:11  root stylesheet
 
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
@@ -138,7 +138,7 @@ c {
 }
 
 <===> bubble/loaded/meta-load-css/warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
diff --git a/spec/css/moz_document/comment.hrx b/spec/css/moz_document/comment.hrx
index adee98c65..854d4889a 100644
--- a/spec/css/moz_document/comment.hrx
+++ b/spec/css/moz_document/comment.hrx
@@ -5,7 +5,7 @@
 @-moz-document url-prefix(a) {}
 
 <===> before_arg/loud/warning
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -25,7 +25,7 @@ For details, see https://sass-lang.com/d/moz-document.
 @-moz-document url-prefix(a) {}
 
 <===> before_arg/silent/warning
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -44,7 +44,7 @@ For details, see https://sass-lang.com/d/moz-document.
 @-moz-document url-prefix(a) {}
 
 <===> after_arg/loud/warning
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -64,7 +64,7 @@ For details, see https://sass-lang.com/d/moz-document.
 @-moz-document url-prefix(a) {}
 
 <===> after_arg/silent/warning
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
diff --git a/spec/css/moz_document/functions/interpolated.hrx b/spec/css/moz_document/functions/interpolated.hrx
index 7dbbd48b4..484182c2d 100644
--- a/spec/css/moz_document/functions/interpolated.hrx
+++ b/spec/css/moz_document/functions/interpolated.hrx
@@ -86,7 +86,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -97,7 +97,7 @@ For details, see https://sass-lang.com/d/moz-document.
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -108,7 +108,7 @@ For details, see https://sass-lang.com/d/moz-document.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -119,7 +119,7 @@ For details, see https://sass-lang.com/d/moz-document.
   '
     input.scss 7:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -130,7 +130,7 @@ For details, see https://sass-lang.com/d/moz-document.
    '
     input.scss 11:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -141,7 +141,7 @@ For details, see https://sass-lang.com/d/moz-document.
    '
     input.scss 14:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -152,7 +152,7 @@ For details, see https://sass-lang.com/d/moz-document.
    '
     input.scss 17:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -163,7 +163,7 @@ For details, see https://sass-lang.com/d/moz-document.
    '
     input.scss 21:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -174,7 +174,7 @@ For details, see https://sass-lang.com/d/moz-document.
    '
     input.scss 24:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -185,7 +185,7 @@ For details, see https://sass-lang.com/d/moz-document.
    '
     input.scss 27:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
diff --git a/spec/css/moz_document/functions/static.hrx b/spec/css/moz_document/functions/static.hrx
index 42c3c25a4..47d1e4517 100644
--- a/spec/css/moz_document/functions/static.hrx
+++ b/spec/css/moz_document/functions/static.hrx
@@ -62,7 +62,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -73,7 +73,7 @@ For details, see https://sass-lang.com/d/moz-document.
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -84,7 +84,7 @@ For details, see https://sass-lang.com/d/moz-document.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -95,7 +95,7 @@ For details, see https://sass-lang.com/d/moz-document.
    '
     input.scss 8:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -106,7 +106,7 @@ For details, see https://sass-lang.com/d/moz-document.
    '
     input.scss 11:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -117,7 +117,7 @@ For details, see https://sass-lang.com/d/moz-document.
    '
     input.scss 15:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
@@ -128,7 +128,7 @@ For details, see https://sass-lang.com/d/moz-document.
    '
     input.scss 18:1  root stylesheet
 
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
diff --git a/spec/css/moz_document/multi_function.hrx b/spec/css/moz_document/multi_function.hrx
index 35da53976..4f90e3949 100644
--- a/spec/css/moz_document/multi_function.hrx
+++ b/spec/css/moz_document/multi_function.hrx
@@ -17,7 +17,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [moz-document]: @-moz-document is deprecated and support will be removed in Dart Sass 2.0.0.
 
 For details, see https://sass-lang.com/d/moz-document.
 
diff --git a/spec/css/plain/error/statement/style_rule.hrx b/spec/css/plain/error/statement/style_rule.hrx
index 2580bb4b7..342fb192a 100644
--- a/spec/css/plain/error/statement/style_rule.hrx
+++ b/spec/css/plain/error/statement/style_rule.hrx
@@ -133,7 +133,7 @@ a {@import "plain"}
 > b {c: d}
 
 <===> leading_combinator/through_import/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/css/plain/functions.hrx b/spec/css/plain/functions.hrx
index 41f03a5e3..f73318ee8 100644
--- a/spec/css/plain/functions.hrx
+++ b/spec/css/plain/functions.hrx
@@ -12,7 +12,7 @@ c {
 }
 
 <===> defined_elsewhere/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/css/plain/import/css_before_index.hrx b/spec/css/plain/import/css_before_index.hrx
index a2fc1dce8..4dc7963ff 100644
--- a/spec/css/plain/import/css_before_index.hrx
+++ b/spec/css/plain/import/css_before_index.hrx
@@ -13,7 +13,7 @@ other {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/css/plain/import/partial_conflict.hrx b/spec/css/plain/import/partial_conflict.hrx
index 2f96975c1..ab3b824fa 100644
--- a/spec/css/plain/import/partial_conflict.hrx
+++ b/spec/css/plain/import/partial_conflict.hrx
@@ -8,7 +8,7 @@ plain {partial: true}
 plain {partial: false}
 
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/css/plain/import/sass_takes_precedence.hrx b/spec/css/plain/import/sass_takes_precedence.hrx
index ffeb5d96d..aafb36424 100644
--- a/spec/css/plain/import/sass_takes_precedence.hrx
+++ b/spec/css/plain/import/sass_takes_precedence.hrx
@@ -14,7 +14,7 @@ other {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/css/plain/import/scss_takes_precedence.hrx b/spec/css/plain/import/scss_takes_precedence.hrx
index 92742477c..6f1cd1dc9 100644
--- a/spec/css/plain/import/scss_takes_precedence.hrx
+++ b/spec/css/plain/import/scss_takes_precedence.hrx
@@ -13,7 +13,7 @@ other {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/css/plain/style_rule.hrx b/spec/css/plain/style_rule.hrx
index c22c62a3a..db1cba6fe 100644
--- a/spec/css/plain/style_rule.hrx
+++ b/spec/css/plain/style_rule.hrx
@@ -240,7 +240,7 @@ a b {
 }
 
 <===> nesting/through_import/one_level/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -266,7 +266,7 @@ a b {
 }
 
 <===> nesting/through_import/two_levels/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -292,7 +292,7 @@ a & {
 }
 
 <===> nesting/through_import/top_level_parent/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/css/selector/combinator/has.hrx b/spec/css/selector/combinator/has.hrx
index 5d4f2c767..8ade6096e 100644
--- a/spec/css/selector/combinator/has.hrx
+++ b/spec/css/selector/combinator/has.hrx
@@ -47,7 +47,7 @@ a {
 <===> leading/multiple/direct/output.css
 
 <===> leading/multiple/direct/warning
-DEPRECATION WARNING: The selector ":has(+ ~ a)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":has(+ ~ a)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -68,7 +68,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> leading/multiple/parent/output.css
 
 <===> leading/multiple/parent/warning
-DEPRECATION WARNING: The selector ":has(+ ~ a)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":has(+ ~ a)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/css/selector/combinator/is.hrx b/spec/css/selector/combinator/is.hrx
index ad0819f28..50aa03f2a 100644
--- a/spec/css/selector/combinator/is.hrx
+++ b/spec/css/selector/combinator/is.hrx
@@ -4,7 +4,7 @@
 <===> leading/single/child/output.css
 
 <===> leading/single/child/warning
-DEPRECATION WARNING: The selector ":is(> a)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(> a)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -23,7 +23,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> leading/single/next_sibling/output.css
 
 <===> leading/single/next_sibling/warning
-DEPRECATION WARNING: The selector ":is(+ a)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(+ a)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -42,7 +42,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> leading/single/sibling/output.css
 
 <===> leading/single/sibling/warning
-DEPRECATION WARNING: The selector ":is(~ a)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(~ a)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -61,7 +61,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> leading/multiple/output.css
 
 <===> leading/multiple/warning
-DEPRECATION WARNING: The selector ":is(+ ~ a)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(+ ~ a)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/css/selector/combinator/leading.hrx b/spec/css/selector/combinator/leading.hrx
index 9b5ce0ac0..068f6550d 100644
--- a/spec/css/selector/combinator/leading.hrx
+++ b/spec/css/selector/combinator/leading.hrx
@@ -7,7 +7,7 @@
 }
 
 <===> single/child/warning
-DEPRECATION WARNING: The selector "> a" is invalid CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "> a" is invalid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -29,7 +29,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 }
 
 <===> single/next_sibling/warning
-DEPRECATION WARNING: The selector "+ a" is invalid CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "+ a" is invalid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -51,7 +51,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 }
 
 <===> single/sibling/warning
-DEPRECATION WARNING: The selector "~ a" is invalid CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "~ a" is invalid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -70,7 +70,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> multiple/whitespace/output.css
 
 <===> multiple/whitespace/warning
-DEPRECATION WARNING: The selector "+ ~ a" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "+ ~ a" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -89,7 +89,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> multiple/no_whitespace/output.css
 
 <===> multiple/no_whitespace/warning
-DEPRECATION WARNING: The selector "> > a" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "> > a" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/css/selector/combinator/middle.hrx b/spec/css/selector/combinator/middle.hrx
index 837c54b2f..19561fa37 100644
--- a/spec/css/selector/combinator/middle.hrx
+++ b/spec/css/selector/combinator/middle.hrx
@@ -34,7 +34,7 @@ a > + b {c: d}
 <===> multiple/whitespace/output.css
 
 <===> multiple/whitespace/warning
-DEPRECATION WARNING: The selector "a > + b" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "a > + b" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -53,7 +53,7 @@ a~>b {c: d}
 <===> multiple/no_whitespace/output.css
 
 <===> multiple/no_whitespace/warning
-DEPRECATION WARNING: The selector "a ~ > b" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "a ~ > b" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/css/selector/combinator/only_one_bogus.hrx b/spec/css/selector/combinator/only_one_bogus.hrx
index 315fd7161..b2614703d 100644
--- a/spec/css/selector/combinator/only_one_bogus.hrx
+++ b/spec/css/selector/combinator/only_one_bogus.hrx
@@ -7,7 +7,7 @@ a, + b {
 }
 
 <===> warning
-DEPRECATION WARNING: The selector "+ b" is invalid CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "+ b" is invalid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/css/selector/combinator/selector_pseudo.hrx b/spec/css/selector/combinator/selector_pseudo.hrx
index 1028d63c3..8bd038991 100644
--- a/spec/css/selector/combinator/selector_pseudo.hrx
+++ b/spec/css/selector/combinator/selector_pseudo.hrx
@@ -34,7 +34,7 @@
 <===> middle/multiple/output.css
 
 <===> middle/multiple/warning
-DEPRECATION WARNING: The selector ":is(a > + b)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(a > + b)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -53,7 +53,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> leading/single/child/output.css
 
 <===> leading/single/child/warning
-DEPRECATION WARNING: The selector ":is(> a)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(> a)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -72,7 +72,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> leading/single/next_sibling/output.css
 
 <===> leading/single/next_sibling/warning
-DEPRECATION WARNING: The selector ":is(+ a)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(+ a)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -91,7 +91,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> leading/single/sibling/output.css
 
 <===> leading/single/sibling/warning
-DEPRECATION WARNING: The selector ":is(~ a)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(~ a)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -110,7 +110,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> leading/multiple/output.css
 
 <===> leading/multiple/warning
-DEPRECATION WARNING: The selector ":is(+ ~ a)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(+ ~ a)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -129,7 +129,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> trailing/single/child/output.css
 
 <===> trailing/single/child/warning
-DEPRECATION WARNING: The selector ":is(a >)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(a >)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -148,7 +148,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> trailing/single/next_sibling/output.css
 
 <===> trailing/single/next_sibling/warning
-DEPRECATION WARNING: The selector ":is(a +)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(a +)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -167,7 +167,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> trailing/single/sibling/output.css
 
 <===> trailing/single/sibling/warning
-DEPRECATION WARNING: The selector ":is(a ~)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(a ~)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -186,7 +186,7 @@ More info: https://sass-lang.com/d/bogus-combinators
 <===> trailing/multiple/output.css
 
 <===> trailing/multiple/warning
-DEPRECATION WARNING: The selector ":is(a +)" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ":is(a +)" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/css/selector/combinator/trailing.hrx b/spec/css/selector/combinator/trailing.hrx
index 351e685bb..d784dd4b1 100644
--- a/spec/css/selector/combinator/trailing.hrx
+++ b/spec/css/selector/combinator/trailing.hrx
@@ -4,7 +4,7 @@ a > {b: c}
 <===> single/child/output.css
 
 <===> single/child/warning
-DEPRECATION WARNING: The selector "a >" is only valid for nesting and shouldn't
+DEPRECATION WARNING [bogus-combinators]: The selector "a >" is only valid for nesting and shouldn't
 have children other than style rules. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
@@ -25,7 +25,7 @@ a + {b: c}
 <===> single/next_sibling/output.css
 
 <===> single/next_sibling/warning
-DEPRECATION WARNING: The selector "a +" is only valid for nesting and shouldn't
+DEPRECATION WARNING [bogus-combinators]: The selector "a +" is only valid for nesting and shouldn't
 have children other than style rules. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
@@ -46,7 +46,7 @@ a ~ {b: c}
 <===> single/sibling/output.css
 
 <===> single/sibling/warning
-DEPRECATION WARNING: The selector "a ~" is only valid for nesting and shouldn't
+DEPRECATION WARNING [bogus-combinators]: The selector "a ~" is only valid for nesting and shouldn't
 have children other than style rules. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
@@ -67,7 +67,7 @@ a + ~ {b: c}
 <===> multiple/whitespace/output.css
 
 <===> multiple/whitespace/warning
-DEPRECATION WARNING: The selector "a + ~" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "a + ~" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -86,7 +86,7 @@ a > > {b: c}
 <===> multiple/no_whitespace/output.css
 
 <===> multiple/no_whitespace/warning
-DEPRECATION WARNING: The selector "a > >" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "a > >" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/css/style_rule.hrx b/spec/css/style_rule.hrx
index b559e3662..10b04b861 100644
--- a/spec/css/style_rule.hrx
+++ b/spec/css/style_rule.hrx
@@ -84,7 +84,7 @@ a {
 }
 
 <===> declaration/interleaved/after_style_rule/same_specificity/warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
@@ -116,7 +116,7 @@ More info: https://sass-lang.com/d/mixed-decls
 }
 
 <===> declaration/interleaved/after_style_rule/mixed_specificity_parent/warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
@@ -148,7 +148,7 @@ More info: https://sass-lang.com/d/mixed-decls
 }
 
 <===> declaration/interleaved/after_style_rule/mixed_specificity_child/warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
@@ -182,7 +182,7 @@ More info: https://sass-lang.com/d/mixed-decls
 }
 
 <===> declaration/interleaved/after_style_rule/extended_parent/warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
@@ -216,7 +216,7 @@ More info: https://sass-lang.com/d/mixed-decls
 }
 
 <===> declaration/interleaved/after_style_rule/extended_child/warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
diff --git a/spec/directives/at_root.hrx b/spec/directives/at_root.hrx
index d27d692ed..f2a3dabb9 100644
--- a/spec/directives/at_root.hrx
+++ b/spec/directives/at_root.hrx
@@ -77,7 +77,7 @@ b {
 }
 
 <===> nested_import/with_no_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -109,7 +109,7 @@ b {
 }
 
 <===> nested_import/with_builtin_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/extend/bogus.hrx b/spec/directives/extend/bogus.hrx
index 254edab65..f968fd38d 100644
--- a/spec/directives/extend/bogus.hrx
+++ b/spec/directives/extend/bogus.hrx
@@ -8,7 +8,7 @@ a, > d {
 }
 
 <===> leading/warning
-DEPRECATION WARNING: The selector "> d" is invalid CSS and shouldn't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "> d" is invalid CSS and shouldn't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -32,7 +32,7 @@ a {
 }
 
 <===> trailing/warning
-DEPRECATION WARNING: The selector "d +" is invalid CSS and shouldn't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "d +" is invalid CSS and shouldn't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -56,7 +56,7 @@ a {
 }
 
 <===> multi/leading/warning
-DEPRECATION WARNING: The selector "+ ~ d" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "+ ~ d" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -80,7 +80,7 @@ a {
 }
 
 <===> multi/trailing/warning
-DEPRECATION WARNING: The selector "d > +" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "d > +" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -104,7 +104,7 @@ a {
 }
 
 <===> multi/middle/warning
-DEPRECATION WARNING: The selector "d ~ > c" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "d ~ > c" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -128,7 +128,7 @@ a {
 }
 
 <===> only/warning
-DEPRECATION WARNING: The selector "+" is invalid CSS and shouldn't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "+" is invalid CSS and shouldn't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/directives/forward/css.hrx b/spec/directives/forward/css.hrx
index 0a14709cf..c55ff6a38 100644
--- a/spec/directives/forward/css.hrx
+++ b/spec/directives/forward/css.hrx
@@ -108,7 +108,7 @@ in-input {
 }
 
 <===> forward_into_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/error/load.hrx b/spec/directives/forward/error/load.hrx
index 89b87464e..37fca2c0f 100644
--- a/spec/directives/forward/error/load.hrx
+++ b/spec/directives/forward/error/load.hrx
@@ -73,7 +73,7 @@ Error: Module loop: this module is already being loaded.
 @import "input";
 
 <===> loop/forward_to_import/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/error/member/import_to_forward.hrx b/spec/directives/forward/error/member/import_to_forward.hrx
index 3cebfeb1b..c252384e2 100644
--- a/spec/directives/forward/error/member/import_to_forward.hrx
+++ b/spec/directives/forward/error/member/import_to_forward.hrx
@@ -10,7 +10,7 @@ b {c: $d}
 $d: e;
 
 <===> nested/variable/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -41,7 +41,7 @@ b {@include c}
 @mixin c {d: e}
 
 <===> nested/mixin/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -77,7 +77,7 @@ b {
 }
 
 <===> nested/function/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/extend.hrx b/spec/directives/forward/extend.hrx
index 8a3f08f59..3fb25676f 100644
--- a/spec/directives/forward/extend.hrx
+++ b/spec/directives/forward/extend.hrx
@@ -63,7 +63,7 @@ in-imported, in-input {
 }
 
 <===> forward_into_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/member/import/forward_to_import.hrx b/spec/directives/forward/member/import/forward_to_import.hrx
index 23e42b2cc..aaf9b303d 100644
--- a/spec/directives/forward/member/import/forward_to_import.hrx
+++ b/spec/directives/forward/member/import/forward_to_import.hrx
@@ -18,7 +18,7 @@ b {
 }
 
 <===> mixin/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -56,7 +56,7 @@ b {
 }
 
 <===> variable_assignment/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -90,7 +90,7 @@ a {
 }
 
 <===> variable_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -126,7 +126,7 @@ a {
 }
 
 <===> with/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/member/import/import_to_forward/nested.hrx b/spec/directives/forward/member/import/import_to_forward/nested.hrx
index d934f7704..3eeb0cc75 100644
--- a/spec/directives/forward/member/import/import_to_forward/nested.hrx
+++ b/spec/directives/forward/member/import/import_to_forward/nested.hrx
@@ -17,7 +17,7 @@ a {
 }
 
 <===> mixin/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -51,7 +51,7 @@ a {
 }
 
 <===> variable_assignment/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -82,7 +82,7 @@ a {
 }
 
 <===> variable_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/member/import/import_to_forward/override.hrx b/spec/directives/forward/member/import/import_to_forward/override.hrx
index ca724783b..0d45dd98c 100644
--- a/spec/directives/forward/member/import/import_to_forward/override.hrx
+++ b/spec/directives/forward/member/import/import_to_forward/override.hrx
@@ -32,7 +32,7 @@ after-second {
 }
 
 <===> override/variable/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -42,7 +42,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -83,7 +83,7 @@ after-second {
 }
 
 <===> override/mixin/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -93,7 +93,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -134,7 +134,7 @@ after-second {
 }
 
 <===> override/function/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -144,7 +144,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/member/import/import_to_forward/top_level.hrx b/spec/directives/forward/member/import/import_to_forward/top_level.hrx
index d9469388c..19f25830e 100644
--- a/spec/directives/forward/member/import/import_to_forward/top_level.hrx
+++ b/spec/directives/forward/member/import/import_to_forward/top_level.hrx
@@ -15,7 +15,7 @@ b {
 }
 
 <===> mixin/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -48,7 +48,7 @@ b {
 }
 
 <===> variable_assignment/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -77,7 +77,7 @@ a {
 }
 
 <===> variable_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -110,7 +110,7 @@ b {
 }
 
 <===> post_facto/without_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -120,7 +120,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -155,7 +155,7 @@ b {
 }
 
 <===> post_facto/with_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -165,7 +165,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/member/import/import_to_forward/transitive.hrx b/spec/directives/forward/member/import/import_to_forward/transitive.hrx
index 2bb3c3eb4..9f795b2d8 100644
--- a/spec/directives/forward/member/import/import_to_forward/transitive.hrx
+++ b/spec/directives/forward/member/import/import_to_forward/transitive.hrx
@@ -18,7 +18,7 @@ a {
 }
 
 <===> transitive/variable/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -28,7 +28,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -61,7 +61,7 @@ a {
 }
 
 <===> transitive/mixin/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -71,7 +71,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -104,7 +104,7 @@ a {
 }
 
 <===> transitive/function/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -114,7 +114,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/member/import/import_to_forward/use_to.hrx b/spec/directives/forward/member/import/import_to_forward/use_to.hrx
index 397ae66b2..3a0533934 100644
--- a/spec/directives/forward/member/import/import_to_forward/use_to.hrx
+++ b/spec/directives/forward/member/import/import_to_forward/use_to.hrx
@@ -18,7 +18,7 @@ b {
 }
 
 <===> mixin/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -55,7 +55,7 @@ b {
 }
 
 <===> variable_assignment/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -88,7 +88,7 @@ a {
 }
 
 <===> variable_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/member/import/import_to_forward/with.hrx b/spec/directives/forward/member/import/import_to_forward/with.hrx
index 6d5b089f8..07a6c158b 100644
--- a/spec/directives/forward/member/import/import_to_forward/with.hrx
+++ b/spec/directives/forward/member/import/import_to_forward/with.hrx
@@ -17,7 +17,7 @@ a {
 }
 
 <===> default/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -50,7 +50,7 @@ b {
 }
 
 <===> non_overridable/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -83,7 +83,7 @@ b {
 }
 
 <===> overridden/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/member/import/precedence.hrx b/spec/directives/forward/member/import/precedence.hrx
index a0027d93b..33fd6c49d 100644
--- a/spec/directives/forward/member/import/precedence.hrx
+++ b/spec/directives/forward/member/import/precedence.hrx
@@ -23,7 +23,7 @@ b {
 }
 
 <===> top_level/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -56,7 +56,7 @@ b {
 }
 
 <===> nested/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/forward/with/through_import.hrx b/spec/directives/forward/with/through_import.hrx
index fc4584b97..70932b3d2 100644
--- a/spec/directives/forward/with/through_import.hrx
+++ b/spec/directives/forward/with/through_import.hrx
@@ -17,7 +17,7 @@ b {
 }
 
 <===> direct/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -53,7 +53,7 @@ b {
 }
 
 <===> transitive/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -65,7 +65,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     _used.scss 1:1       @use
     input.scss 1:1       root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/function.hrx b/spec/directives/function.hrx
index 96f0e23cd..d0138b77b 100644
--- a/spec/directives/function.hrx
+++ b/spec/directives/function.hrx
@@ -22,7 +22,7 @@ b {
 }
 
 <===> custom_ident_name/warning
-DEPRECATION WARNING: Sass @function names beginning with -- are deprecated for forward-compatibility with plain CSS mixins.
+DEPRECATION WARNING [css-function-mixin]: Sass @function names beginning with -- are deprecated for forward-compatibility with plain CSS mixins.
 
 For details, see https://sass-lang.com/d/css-function-mixin
 
@@ -55,7 +55,7 @@ b {
 }
 
 <===> custom_ident_call/warning
-DEPRECATION WARNING: Sass @function names beginning with -- are deprecated for forward-compatibility with plain CSS functions.
+DEPRECATION WARNING [css-function-mixin]: Sass @function names beginning with -- are deprecated for forward-compatibility with plain CSS functions.
 
 For details, see https://sass-lang.com/d/css-function-mixin
 
diff --git a/spec/directives/import/configuration.hrx b/spec/directives/import/configuration.hrx
index 9cda5320a..c40f16193 100644
--- a/spec/directives/import/configuration.hrx
+++ b/spec/directives/import/configuration.hrx
@@ -15,7 +15,7 @@ b {
 }
 
 <===> same_file/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -46,7 +46,7 @@ a b {
 }
 
 <===> nested/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -75,7 +75,7 @@ b {
 }
 
 <===> prefixed_as/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -107,7 +107,7 @@ b {
 }
 
 <===> separate_file/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -117,7 +117,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -147,7 +147,7 @@ b {
 }
 
 <===> unrelated_variable/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -177,7 +177,7 @@ b {
 }
 
 <===> midstream_definition/with_config/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -206,7 +206,7 @@ b {
 }
 
 <===> midstream_definition/no_config/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -240,7 +240,7 @@ b {
 }
 
 <===> import_twice/no_change/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -250,7 +250,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 2:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -285,7 +285,7 @@ b {
 }
 
 <===> import_twice/with_change/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -295,7 +295,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 2:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -337,7 +337,7 @@ d {
 }
 
 <===> import_twice/still_changes_in_same_file/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -347,7 +347,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -379,7 +379,7 @@ b {
 }
 
 <===> indirect/through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -389,7 +389,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 2:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -425,7 +425,7 @@ b {
 }
 
 <===> indirect/through_forward/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/import/css.hrx b/spec/directives/import/css.hrx
index 54f0ea84e..4996fa07f 100644
--- a/spec/directives/import/css.hrx
+++ b/spec/directives/import/css.hrx
@@ -25,7 +25,7 @@ a {
 }
 
 <===> css_import_after_style_rule/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 2:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/import/error/conflict.hrx b/spec/directives/import/error/conflict.hrx
index b168ad49d..49abadd75 100644
--- a/spec/directives/import/error/conflict.hrx
+++ b/spec/directives/import/error/conflict.hrx
@@ -10,7 +10,7 @@ a {partial: true}
 a {partial: false}
 
 <===> partial/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -44,7 +44,7 @@ a
 a {syntax: scss}
 
 <===> extension/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -87,7 +87,7 @@ a
 a {syntax: scss; partial: true}
 
 <===> all/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -122,7 +122,7 @@ a {partial: true}
 a {partial: false}
 
 <===> index/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -156,7 +156,7 @@ a
   syntax: sass
 
 <===> import_only/no_extension/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -189,7 +189,7 @@ a {partial: false}
 a {partial: true}
 
 <===> import_only/with_extension/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/import/error/member.hrx b/spec/directives/import/error/member.hrx
index b3464be89..7ebd81d17 100644
--- a/spec/directives/import/error/member.hrx
+++ b/spec/directives/import/error/member.hrx
@@ -7,7 +7,7 @@ b {c: $d}
 $d: e;
 
 <===> inaccessible/nested/variable/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -35,7 +35,7 @@ b {@include c}
 @mixin c() {d: e};
 
 <===> inaccessible/nested/mixin/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -68,7 +68,7 @@ b {
 }
 
 <===> inaccessible/nested/function/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/import/error/not_found.hrx b/spec/directives/import/error/not_found.hrx
index 197e739b5..165d7c544 100644
--- a/spec/directives/import/error/not_found.hrx
+++ b/spec/directives/import/error/not_found.hrx
@@ -5,7 +5,7 @@
 a {b: c}
 
 <===> no_extension/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -33,7 +33,7 @@ Error: Can't find stylesheet to import.
 a {b: c}
 
 <===> directory_dot_import/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -65,7 +65,7 @@ a {b: ""}
 @import "sibling"
 
 <===> parent_relative/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -75,7 +75,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 4:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/import/escaped.hrx b/spec/directives/import/escaped.hrx
index 7f1edc79a..35b291a63 100644
--- a/spec/directives/import/escaped.hrx
+++ b/spec/directives/import/escaped.hrx
@@ -10,7 +10,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/import/implicit_dependencies.hrx b/spec/directives/import/implicit_dependencies.hrx
index 68bc936bd..84aa9ccb8 100644
--- a/spec/directives/import/implicit_dependencies.hrx
+++ b/spec/directives/import/implicit_dependencies.hrx
@@ -16,7 +16,7 @@ a {
 }
 
 <===> no_forward/no_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -26,7 +26,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -58,7 +58,7 @@ a {
 }
 
 <===> no_forward/use_in_first/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -68,7 +68,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -100,7 +100,7 @@ a {
 }
 
 <===> no_forward/use_in_second/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -110,7 +110,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -144,7 +144,7 @@ a {
 }
 
 <===> no_forward/use_in_both/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -154,7 +154,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -187,7 +187,7 @@ a {
 }
 
 <===> forwarded_first/no_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -197,7 +197,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -232,7 +232,7 @@ a {
 }
 
 <===> forwarded_first/use_in_first/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -242,7 +242,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -277,7 +277,7 @@ a {
 }
 
 <===> forwarded_first/use_in_second/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -287,7 +287,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -324,7 +324,7 @@ a {
 }
 
 <===> forwarded_first/use_in_both/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -334,7 +334,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/import/load.hrx b/spec/directives/import/load.hrx
index f5baf55c3..ace5c9a02 100644
--- a/spec/directives/import/load.hrx
+++ b/spec/directives/import/load.hrx
@@ -17,7 +17,7 @@ a {
 }
 
 <===> explicit_extension/sass/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -48,7 +48,7 @@ a {
 }
 
 <===> explicit_extension/scss/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -75,7 +75,7 @@ a {
 }
 
 <===> precedence/scss_before_css/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -103,7 +103,7 @@ a {
 }
 
 <===> precedence/sass_before_css/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -130,7 +130,7 @@ a {
 }
 
 <===> precedence/normal_before_index/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -160,7 +160,7 @@ a {
 }
 
 <===> precedence/import_only/implicit_extension/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -187,7 +187,7 @@ a {
 }
 
 <===> precedence/import_only/explicit_extension/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -215,7 +215,7 @@ a {
 }
 
 <===> precedence/import_only/partial_before_normal/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -243,7 +243,7 @@ a {
 }
 
 <===> precedence/import_only/normal_before_partial/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -271,7 +271,7 @@ a {
 }
 
 <===> precedence/import_only/before_index/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -299,7 +299,7 @@ a {
 }
 
 <===> precedence/import_only/index/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -327,7 +327,7 @@ a {
 }
 
 <===> precedence/import_only/index_after_normal/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -353,7 +353,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 }
 
 <===> index/scss/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -378,7 +378,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 }
 
 <===> index/sass/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -404,7 +404,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 }
 
 <===> index/partial/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -430,7 +430,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 }
 
 <===> index/dir_dot_foo/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -451,7 +451,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 }
 
 <===> index/dir_dot_scss/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/import/nested.hrx b/spec/directives/import/nested.hrx
index efc007ca2..b6baf321b 100644
--- a/spec/directives/import/nested.hrx
+++ b/spec/directives/import/nested.hrx
@@ -20,7 +20,7 @@ x {
 }
 
 <===> scope/function/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -52,7 +52,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 }
 
 <===> scope/mixin/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -83,7 +83,7 @@ x {
 }
 
 <===> scope/variable/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -113,7 +113,7 @@ a {@import "other"}
 }
 
 <===> at_rule/keyframes/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -137,7 +137,7 @@ a {
 }
 
 <===> at_rule/childless/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -163,7 +163,7 @@ a {@import "other"}
 }
 
 <===> at_rule/declaration_child/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -191,7 +191,7 @@ a {@import "other"}
 }
 
 <===> at_rule/rule_child/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -221,7 +221,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 /* Y */
 
 <===> with_comment/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -231,7 +231,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -241,7 +241,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 2:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -252,7 +252,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     _b.scss 1:9     @import
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/mixin.hrx b/spec/directives/mixin.hrx
index 807a3672c..1bd2cbd8b 100644
--- a/spec/directives/mixin.hrx
+++ b/spec/directives/mixin.hrx
@@ -8,7 +8,7 @@ d {
 }
 
 <===> custom_ident_name/warning
-DEPRECATION WARNING: Sass @mixin names beginning with -- are deprecated for forward-compatibility with plain CSS mixins.
+DEPRECATION WARNING [css-function-mixin]: Sass @mixin names beginning with -- are deprecated for forward-compatibility with plain CSS mixins.
 
 For details, see https://sass-lang.com/d/css-function-mixin
 
@@ -41,7 +41,7 @@ d {
 }
 
 <===> custom_ident_include/warning
-DEPRECATION WARNING: Sass @mixin names beginning with -- are deprecated for forward-compatibility with plain CSS mixins.
+DEPRECATION WARNING [css-function-mixin]: Sass @mixin names beginning with -- are deprecated for forward-compatibility with plain CSS mixins.
 
 For details, see https://sass-lang.com/d/css-function-mixin
 
diff --git a/spec/directives/use/css/import.hrx b/spec/directives/use/css/import.hrx
index dcaded1a5..6b2e80e04 100644
--- a/spec/directives/use/css/import.hrx
+++ b/spec/directives/use/css/import.hrx
@@ -25,7 +25,7 @@ in-input {
 }
 
 <===> use_into_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -74,7 +74,7 @@ in-input {
 }
 
 <===> use_into_import_into_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -111,7 +111,7 @@ a {
 }
 
 <===> use_and_import_same/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -152,7 +152,7 @@ a {
 }
 
 <===> use_module_used_by_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -193,7 +193,7 @@ in-input {
 }
 
 <===> import_into_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -230,7 +230,7 @@ outer in-imported {
 }
 
 <===> nested_import_into_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -278,7 +278,7 @@ in-input {
 }
 
 <===> import_into_use_into_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -288,7 +288,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -326,7 +326,7 @@ a {
 }
 
 <===> import_module_imported_by_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -336,7 +336,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 2:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/use/css/order/use_and_import.hrx b/spec/directives/use/css/order/use_and_import.hrx
index 5626ea026..424891bdc 100644
--- a/spec/directives/use/css/order/use_and_import.hrx
+++ b/spec/directives/use/css/order/use_and_import.hrx
@@ -92,7 +92,7 @@ a {
 }
 
 <===> use_into_import/css_import_above_rule/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -135,7 +135,7 @@ a {
 }
 
 <===> use_into_import/css_import_below_rule/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -167,7 +167,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 @import "input.css";
 
 <===> use_into_import/sass_import_below_css_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -210,7 +210,7 @@ a {
 }
 
 <===> import_into_use/css_import_above_rule/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -252,7 +252,7 @@ a {
 }
 
 <===> import_into_use/css_import_below_rule/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -283,7 +283,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 @import "imported.css";
 
 <===> import_into_use/sass_import_below_css_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/use/error/load.hrx b/spec/directives/use/error/load.hrx
index 4ab66def2..d454ab282 100644
--- a/spec/directives/use/error/load.hrx
+++ b/spec/directives/use/error/load.hrx
@@ -206,7 +206,7 @@ Error: Module loop: this module is already being loaded.
 @import "input";
 
 <===> loop/use_to_import/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -234,7 +234,7 @@ Error: This file is already being loaded.
 @use "input";
 
 <===> loop/import_to_use/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/use/error/member/inaccessible.hrx b/spec/directives/use/error/member/inaccessible.hrx
index e22bfa156..89007982d 100644
--- a/spec/directives/use/error/member/inaccessible.hrx
+++ b/spec/directives/use/error/member/inaccessible.hrx
@@ -72,7 +72,7 @@ a {b: $upstream};
 $upstream: value;
 
 <===> transitive_from_import/variable/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -110,7 +110,7 @@ a {
 }
 
 <===> transitive_from_import/function/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -134,7 +134,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 @mixin upstream {a {b: c}}
 
 <===> transitive_from_import/mixin/error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/use/extend/scope.hrx b/spec/directives/use/extend/scope.hrx
index 6b630c70d..d9c345a52 100644
--- a/spec/directives/use/extend/scope.hrx
+++ b/spec/directives/use/extend/scope.hrx
@@ -121,7 +121,7 @@ shared, in-imported {
 }
 
 <===> use_into_use_and_import_into_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -163,7 +163,7 @@ shared, in-imported {
 }
 
 <===> use_into_use_and_import_into_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -173,7 +173,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 2:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -216,7 +216,7 @@ shared, in-importer {
 }
 
 <===> use_into_use_and_use_into_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -262,7 +262,7 @@ shared, in-used {
 }
 
 <===> use_into_use_and_use_into_import_into_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -320,7 +320,7 @@ in-shared, right-extendee, left-extendee {
 }
 
 <===> use_and_import_into_diamond_extend/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -330,7 +330,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 2:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -375,7 +375,7 @@ More info and automated migrator: https://sass-lang.com/d/import
 }
 
 <===> isolated_through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/use/member/nested_global_variable.hrx b/spec/directives/use/member/nested_global_variable.hrx
index fbba36ff3..06ddb5950 100644
--- a/spec/directives/use/member/nested_global_variable.hrx
+++ b/spec/directives/use/member/nested_global_variable.hrx
@@ -48,7 +48,7 @@ a {
 }
 
 <===> through_import/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/use/member/use_to_import.hrx b/spec/directives/use/member/use_to_import.hrx
index 3dfcc0ea4..b1045efe2 100644
--- a/spec/directives/use/member/use_to_import.hrx
+++ b/spec/directives/use/member/use_to_import.hrx
@@ -15,7 +15,7 @@ a {
 }
 
 <===> variable_use/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -49,7 +49,7 @@ a {
 }
 
 <===> variable_assignment/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -79,7 +79,7 @@ a {
 }
 
 <===> function/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -109,7 +109,7 @@ a {
 }
 
 <===> mixin/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/directives/use/with/through_import.hrx b/spec/directives/use/with/through_import.hrx
index 1fb3753c6..667b3f635 100644
--- a/spec/directives/use/with/through_import.hrx
+++ b/spec/directives/use/with/through_import.hrx
@@ -14,7 +14,7 @@ b {
 }
 
 <===> direct/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -46,7 +46,7 @@ b {
 }
 
 <===> transitive/warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -57,7 +57,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     _used.scss 1:9  @use
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_1060.hrx b/spec/libsass-closed-issues/issue_1060.hrx
index 8a0016185..939f3efe7 100644
--- a/spec/libsass-closed-issues/issue_1060.hrx
+++ b/spec/libsass-closed-issues/issue_1060.hrx
@@ -24,7 +24,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: @elseif is deprecated and will not be supported in future Sass versions.
+DEPRECATION WARNING [elseif]: @elseif is deprecated and will not be supported in future Sass versions.
 
 Recommendation: @else if
 
diff --git a/spec/libsass-closed-issues/issue_1075.hrx b/spec/libsass-closed-issues/issue_1075.hrx
index 24a68544f..ac57e687a 100644
--- a/spec/libsass-closed-issues/issue_1075.hrx
+++ b/spec/libsass-closed-issues/issue_1075.hrx
@@ -12,7 +12,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("lighten"))
 
@@ -22,7 +22,7 @@ Recommendation: call(get-function("lighten"))
   '
     input.scss 5:8  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -33,7 +33,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 5:8  root stylesheet
 
-DEPRECATION WARNING: lighten() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: lighten() is deprecated. Suggestions:
 
 color.scale($color, $lightness: 20%)
 color.adjust($color, $lightness: 10%)
diff --git a/spec/libsass-closed-issues/issue_1081.hrx b/spec/libsass-closed-issues/issue_1081.hrx
index 047e5c4fe..47d6bd7c7 100644
--- a/spec/libsass-closed-issues/issue_1081.hrx
+++ b/spec/libsass-closed-issues/issue_1081.hrx
@@ -39,7 +39,7 @@ after import-after {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -49,7 +49,7 @@ More info and automated migrator: https://sass-lang.com/d/import
    '
     input.scss 10:11  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
diff --git a/spec/libsass-closed-issues/issue_1103.hrx b/spec/libsass-closed-issues/issue_1103.hrx
index ebf171dc3..b075f66ed 100644
--- a/spec/libsass-closed-issues/issue_1103.hrx
+++ b/spec/libsass-closed-issues/issue_1103.hrx
@@ -62,7 +62,7 @@ baz {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -72,7 +72,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_1132.hrx b/spec/libsass-closed-issues/issue_1132.hrx
index 9bbdf2ff6..07925bb6a 100644
--- a/spec/libsass-closed-issues/issue_1132.hrx
+++ b/spec/libsass-closed-issues/issue_1132.hrx
@@ -372,7 +372,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
diff --git a/spec/libsass-closed-issues/issue_1133/normal.hrx b/spec/libsass-closed-issues/issue_1133/normal.hrx
index f2a64973f..8ba40683a 100644
--- a/spec/libsass-closed-issues/issue_1133/normal.hrx
+++ b/spec/libsass-closed-issues/issue_1133/normal.hrx
@@ -30,7 +30,7 @@ b {
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("foo"))
 
diff --git a/spec/libsass-closed-issues/issue_1133/vararg.hrx b/spec/libsass-closed-issues/issue_1133/vararg.hrx
index 5acbd9a9c..bfd9cc731 100644
--- a/spec/libsass-closed-issues/issue_1133/vararg.hrx
+++ b/spec/libsass-closed-issues/issue_1133/vararg.hrx
@@ -30,7 +30,7 @@ b {
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("foo"))
 
diff --git a/spec/libsass-closed-issues/issue_1163.hrx b/spec/libsass-closed-issues/issue_1163.hrx
index 325ff74f1..27755c99f 100644
--- a/spec/libsass-closed-issues/issue_1163.hrx
+++ b/spec/libsass-closed-issues/issue_1163.hrx
@@ -8,7 +8,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(92px * 12, 13px) or calc((92px * 12) / 13px)
 
diff --git a/spec/libsass-closed-issues/issue_1188.hrx b/spec/libsass-closed-issues/issue_1188.hrx
index 1dc1b8a85..fe35db9fe 100644
--- a/spec/libsass-closed-issues/issue_1188.hrx
+++ b/spec/libsass-closed-issues/issue_1188.hrx
@@ -11,7 +11,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($columns, $name-multiplicator) or calc($columns / $name-multiplicator)
 
diff --git a/spec/libsass-closed-issues/issue_1266/max.hrx b/spec/libsass-closed-issues/issue_1266/max.hrx
index fbc38242b..f3b7a7ba4 100644
--- a/spec/libsass-closed-issues/issue_1266/max.hrx
+++ b/spec/libsass-closed-issues/issue_1266/max.hrx
@@ -6,7 +6,7 @@ foo {
 }
 
 <===> error
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function(max))
 
@@ -16,7 +16,7 @@ Recommendation: call(get-function(max))
   '
     input.scss 4:8  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.max instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/libsass-closed-issues/issue_1266/min.hrx b/spec/libsass-closed-issues/issue_1266/min.hrx
index 69c94f74f..c3fe6519e 100644
--- a/spec/libsass-closed-issues/issue_1266/min.hrx
+++ b/spec/libsass-closed-issues/issue_1266/min.hrx
@@ -6,7 +6,7 @@ foo {
 }
 
 <===> error
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function(min))
 
@@ -16,7 +16,7 @@ Recommendation: call(get-function(min))
   '
     input.scss 4:8  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.min instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/libsass-closed-issues/issue_1305.hrx b/spec/libsass-closed-issues/issue_1305.hrx
index 5b79330e6..ca850dbc0 100644
--- a/spec/libsass-closed-issues/issue_1305.hrx
+++ b/spec/libsass-closed-issues/issue_1305.hrx
@@ -10,7 +10,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("unquote"))
 
@@ -20,7 +20,7 @@ Recommendation: call(get-function("unquote"))
   '
     input.scss 3:14  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.unquote instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/libsass-closed-issues/issue_1417.hrx b/spec/libsass-closed-issues/issue_1417.hrx
index 4d0287c4f..6153396bc 100644
--- a/spec/libsass-closed-issues/issue_1417.hrx
+++ b/spec/libsass-closed-issues/issue_1417.hrx
@@ -23,7 +23,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px, math.round(1.5)) or calc(1px / math.round(1.5))
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 9:8  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px, 2px)
 
@@ -47,7 +47,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 10:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px, math.round(1.5)) or calc(1px / math.round(1.5))
 
@@ -59,7 +59,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 10:23  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px, math.round(1.5)) or calc(1px / math.round(1.5))
 
@@ -71,7 +71,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 11:27  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px, 2px)
 
@@ -83,7 +83,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:27  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px, math.round(1.5)) or calc(1px / math.round(1.5))
 
@@ -95,7 +95,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:38  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function(missing))
 
diff --git a/spec/libsass-closed-issues/issue_1418/dynamic.hrx b/spec/libsass-closed-issues/issue_1418/dynamic.hrx
index 14038c155..a8e57da26 100644
--- a/spec/libsass-closed-issues/issue_1418/dynamic.hrx
+++ b/spec/libsass-closed-issues/issue_1418/dynamic.hrx
@@ -5,7 +5,7 @@ foo {
 }
 
 <===> error
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function(missing))
 
diff --git a/spec/libsass-closed-issues/issue_1488.hrx b/spec/libsass-closed-issues/issue_1488.hrx
index 455c76be0..143c0cfd4 100644
--- a/spec/libsass-closed-issues/issue_1488.hrx
+++ b/spec/libsass-closed-issues/issue_1488.hrx
@@ -61,7 +61,7 @@ bar {
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("foo"))
 
@@ -71,7 +71,7 @@ Recommendation: call(get-function("foo"))
    '
     input.scss 23:8  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("foo"))
 
@@ -81,7 +81,7 @@ Recommendation: call(get-function("foo"))
    '
     input.scss 24:8  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("bar"))
 
@@ -91,7 +91,7 @@ Recommendation: call(get-function("bar"))
    '
     input.scss 25:8  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("bar"))
 
@@ -101,7 +101,7 @@ Recommendation: call(get-function("bar"))
    '
     input.scss 26:8  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("foo_"))
 
@@ -111,7 +111,7 @@ Recommendation: call(get-function("foo_"))
    '
     input.scss 34:8  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("foo_"))
 
@@ -121,7 +121,7 @@ Recommendation: call(get-function("foo_"))
    '
     input.scss 35:8  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("bar_"))
 
@@ -131,7 +131,7 @@ Recommendation: call(get-function("bar_"))
    '
     input.scss 36:8  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("bar_"))
 
diff --git a/spec/libsass-closed-issues/issue_1566.hrx b/spec/libsass-closed-issues/issue_1566.hrx
index e32b053dc..cbd796d9f 100644
--- a/spec/libsass-closed-issues/issue_1566.hrx
+++ b/spec/libsass-closed-issues/issue_1566.hrx
@@ -18,7 +18,7 @@ test {
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("bar"))
 
diff --git a/spec/libsass-closed-issues/issue_1579.hrx b/spec/libsass-closed-issues/issue_1579.hrx
index 76f1faeca..246235e59 100644
--- a/spec/libsass-closed-issues/issue_1579.hrx
+++ b/spec/libsass-closed-issues/issue_1579.hrx
@@ -18,7 +18,7 @@ test {
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function(foo))
 
diff --git a/spec/libsass-closed-issues/issue_1622.hrx b/spec/libsass-closed-issues/issue_1622.hrx
index ed30e49dd..a5ee3dec5 100644
--- a/spec/libsass-closed-issues/issue_1622.hrx
+++ b/spec/libsass-closed-issues/issue_1622.hrx
@@ -19,7 +19,7 @@ test {
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function(bar))
 
diff --git a/spec/libsass-closed-issues/issue_1632.hrx b/spec/libsass-closed-issues/issue_1632.hrx
index 32abbea89..b1eaf6f24 100644
--- a/spec/libsass-closed-issues/issue_1632.hrx
+++ b/spec/libsass-closed-issues/issue_1632.hrx
@@ -8,7 +8,7 @@ $foo: \/ !global;
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
diff --git a/spec/libsass-closed-issues/issue_1634.hrx b/spec/libsass-closed-issues/issue_1634.hrx
index bc6dec9f9..dd70055c3 100644
--- a/spec/libsass-closed-issues/issue_1634.hrx
+++ b/spec/libsass-closed-issues/issue_1634.hrx
@@ -20,7 +20,7 @@ test {
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function(bar))
 
diff --git a/spec/libsass-closed-issues/issue_1645.hrx b/spec/libsass-closed-issues/issue_1645.hrx
index 97c6d854f..c2d7650e5 100644
--- a/spec/libsass-closed-issues/issue_1645.hrx
+++ b/spec/libsass-closed-issues/issue_1645.hrx
@@ -25,7 +25,7 @@ test {
 }
 
 <===> warning
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function(foo))
 
diff --git a/spec/libsass-closed-issues/issue_1648.hrx b/spec/libsass-closed-issues/issue_1648.hrx
index 7156e6bd8..1e1c70a42 100644
--- a/spec/libsass-closed-issues/issue_1648.hrx
+++ b/spec/libsass-closed-issues/issue_1648.hrx
@@ -23,7 +23,7 @@ $x: 3px;
 /* comment 5 */
 
 <===> warning
-DEPRECATION WARNING: @elseif is deprecated and will not be supported in future Sass versions.
+DEPRECATION WARNING [elseif]: @elseif is deprecated and will not be supported in future Sass versions.
 
 Recommendation: @else if
 
diff --git a/spec/libsass-closed-issues/issue_1739/basic.hrx b/spec/libsass-closed-issues/issue_1739/basic.hrx
index c08a72caa..94221d05a 100644
--- a/spec/libsass-closed-issues/issue_1739/basic.hrx
+++ b/spec/libsass-closed-issues/issue_1739/basic.hrx
@@ -70,7 +70,7 @@ mod {
 }
 
 <===> warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     2 + 3
 
diff --git a/spec/libsass-closed-issues/issue_1739/interpolate/both.hrx b/spec/libsass-closed-issues/issue_1739/interpolate/both.hrx
index 1985e8e47..a83a0808a 100644
--- a/spec/libsass-closed-issues/issue_1739/interpolate/both.hrx
+++ b/spec/libsass-closed-issues/issue_1739/interpolate/both.hrx
@@ -34,7 +34,7 @@ mod {
   baz: #{1  %  2}  %  #{1  %  2};
 }
 <===> error
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     1 + 2
 
@@ -54,7 +54,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 11:10  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     1 + 2
 
@@ -74,7 +74,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 11:21  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{1 + 2} + #{1 + 2}
 
diff --git a/spec/libsass-closed-issues/issue_1739/interpolate/left.hrx b/spec/libsass-closed-issues/issue_1739/interpolate/left.hrx
index 93734efea..8d9ea1bf6 100644
--- a/spec/libsass-closed-issues/issue_1739/interpolate/left.hrx
+++ b/spec/libsass-closed-issues/issue_1739/interpolate/left.hrx
@@ -34,7 +34,7 @@ mod {
   baz: #{1  %  2}  %  3;
 }
 <===> error
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     1 + 2
 
@@ -54,7 +54,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 11:10  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{1 + 2} + 3
 
diff --git a/spec/libsass-closed-issues/issue_1739/interpolate/right.hrx b/spec/libsass-closed-issues/issue_1739/interpolate/right.hrx
index b489e1633..77a0aa2ff 100644
--- a/spec/libsass-closed-issues/issue_1739/interpolate/right.hrx
+++ b/spec/libsass-closed-issues/issue_1739/interpolate/right.hrx
@@ -34,7 +34,7 @@ mod {
   baz: 3 %  #{1  %  2};
 }
 <===> error
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     1 + 2
 
@@ -54,7 +54,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 11:14  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     3 + #{1 + 2}
 
diff --git a/spec/libsass-closed-issues/issue_1766.hrx b/spec/libsass-closed-issues/issue_1766.hrx
index c85af2069..cc496b7a6 100644
--- a/spec/libsass-closed-issues/issue_1766.hrx
+++ b/spec/libsass-closed-issues/issue_1766.hrx
@@ -18,7 +18,7 @@ foo { bar: baz }
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -28,7 +28,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:22  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_1792.hrx b/spec/libsass-closed-issues/issue_1792.hrx
index 251efa191..2b8558bc6 100644
--- a/spec/libsass-closed-issues/issue_1792.hrx
+++ b/spec/libsass-closed-issues/issue_1792.hrx
@@ -10,7 +10,7 @@ test {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3px * 4in, 1in) or calc((3px * 4in) / 1in)
 
@@ -22,7 +22,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div((1px * 2in) + (3px * 4in), 1in) or calc(((1px * 2in) + (3px * 4in)) / 1in)
 
diff --git a/spec/libsass-closed-issues/issue_1801/import-cycle.hrx b/spec/libsass-closed-issues/issue_1801/import-cycle.hrx
index 7160c90de..54a3ea710 100644
--- a/spec/libsass-closed-issues/issue_1801/import-cycle.hrx
+++ b/spec/libsass-closed-issues/issue_1801/import-cycle.hrx
@@ -8,7 +8,7 @@
 @import 'alpha';
 
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -18,7 +18,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -29,7 +29,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     _alpha.scss 1:9  @import
     input.scss 1:9   root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_1926.hrx b/spec/libsass-closed-issues/issue_1926.hrx
index d21ff415e..6dd4f84d3 100644
--- a/spec/libsass-closed-issues/issue_1926.hrx
+++ b/spec/libsass-closed-issues/issue_1926.hrx
@@ -116,7 +116,7 @@ $columnName  : one two three four five six seven eight nine ten eleven twelve th
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(100%, $columnAmount) or calc(100% / $columnAmount)
 
@@ -129,7 +129,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
     input.sass 11:14  column-generator()
     input.sass 18:3   root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(100%, $columnAmount) or calc(100% / $columnAmount)
 
diff --git a/spec/libsass-closed-issues/issue_2042.hrx b/spec/libsass-closed-issues/issue_2042.hrx
index c58d98619..2fa02857d 100644
--- a/spec/libsass-closed-issues/issue_2042.hrx
+++ b/spec/libsass-closed-issues/issue_2042.hrx
@@ -12,7 +12,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(50, 1) or calc(50 / 1)
 
@@ -24,7 +24,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:23  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(50, 1) or calc(50 / 1)
 
diff --git a/spec/libsass-closed-issues/issue_2106/test.hrx b/spec/libsass-closed-issues/issue_2106/test.hrx
index 304c8b182..18f68ffbd 100644
--- a/spec/libsass-closed-issues/issue_2106/test.hrx
+++ b/spec/libsass-closed-issues/issue_2106/test.hrx
@@ -2,7 +2,7 @@
 @import "../does-not-exist";
 
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_2233.hrx b/spec/libsass-closed-issues/issue_2233.hrx
index c6548322b..99bb36262 100644
--- a/spec/libsass-closed-issues/issue_2233.hrx
+++ b/spec/libsass-closed-issues/issue_2233.hrx
@@ -14,7 +14,7 @@ a { b: c; }
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_2295/basic.hrx b/spec/libsass-closed-issues/issue_2295/basic.hrx
index 115e91569..67db228eb 100644
--- a/spec/libsass-closed-issues/issue_2295/basic.hrx
+++ b/spec/libsass-closed-issues/issue_2295/basic.hrx
@@ -12,7 +12,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_2295/original.hrx b/spec/libsass-closed-issues/issue_2295/original.hrx
index 93b3938f7..753169383 100644
--- a/spec/libsass-closed-issues/issue_2295/original.hrx
+++ b/spec/libsass-closed-issues/issue_2295/original.hrx
@@ -28,7 +28,7 @@ $include-foo: true !default;
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_2303.hrx b/spec/libsass-closed-issues/issue_2303.hrx
index e63c01ccd..966909c06 100644
--- a/spec/libsass-closed-issues/issue_2303.hrx
+++ b/spec/libsass-closed-issues/issue_2303.hrx
@@ -21,7 +21,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_2304.hrx b/spec/libsass-closed-issues/issue_2304.hrx
index 8947afb74..58796a25d 100644
--- a/spec/libsass-closed-issues/issue_2304.hrx
+++ b/spec/libsass-closed-issues/issue_2304.hrx
@@ -9,7 +9,7 @@
   background: red;
 }
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_2309.hrx b/spec/libsass-closed-issues/issue_2309.hrx
index b144a984d..99989c0d6 100644
--- a/spec/libsass-closed-issues/issue_2309.hrx
+++ b/spec/libsass-closed-issues/issue_2309.hrx
@@ -41,7 +41,7 @@ $button-sizes: (
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(16, 12) or calc(16 / 12)
 
@@ -53,7 +53,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 5:20  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(18, 14) or calc(18 / 14)
 
@@ -65,7 +65,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 8:20  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(18, 14) or calc(18 / 14)
 
@@ -77,7 +77,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 11:20  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(22, 16) or calc(22 / 16)
 
diff --git a/spec/libsass-closed-issues/issue_239.hrx b/spec/libsass-closed-issues/issue_239.hrx
index 806fe6208..0029a4d3b 100644
--- a/spec/libsass-closed-issues/issue_239.hrx
+++ b/spec/libsass-closed-issues/issue_239.hrx
@@ -91,7 +91,7 @@ $i: 1;
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(100%, 36.2)
 
@@ -103,7 +103,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 1:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(12, $n) or calc(12 / $n)
 
@@ -116,7 +116,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
     input.scss 6:15   col-width()
     input.scss 21:16  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(100% - $gutter * ($divisor - 1), $divisor) or calc((100% - $gutter * ($divisor - 1)) / $divisor)
 
diff --git a/spec/libsass-closed-issues/issue_246.hrx b/spec/libsass-closed-issues/issue_246.hrx
index 8963595ac..e838cb5b6 100644
--- a/spec/libsass-closed-issues/issue_246.hrx
+++ b/spec/libsass-closed-issues/issue_246.hrx
@@ -22,7 +22,7 @@ $content-width: 960px;
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($content-width, 2) or calc($content-width / 2)
 
@@ -34,7 +34,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 5:30  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($content-width, 2) or calc($content-width / 2)
 
diff --git a/spec/libsass-closed-issues/issue_2472.hrx b/spec/libsass-closed-issues/issue_2472.hrx
index 39a472cf5..76053e4af 100644
--- a/spec/libsass-closed-issues/issue_2472.hrx
+++ b/spec/libsass-closed-issues/issue_2472.hrx
@@ -31,7 +31,7 @@ $arg: join((), 5%);
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.join instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -42,7 +42,7 @@ More info and automated migrator: https://sass-lang.com/d/import
    '
     input.scss 14:7  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -53,7 +53,7 @@ More info and automated migrator: https://sass-lang.com/d/import
    '
     input.scss 17:11  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -39.84375%)
 color.adjust($color, $lightness: -5%)
@@ -66,7 +66,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 17:11  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -77,7 +77,7 @@ More info and automated migrator: https://sass-lang.com/d/import
    '
     input.scss 18:8  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -39.84375%)
 color.adjust($color, $lightness: -5%)
@@ -90,7 +90,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 18:8  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.call instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -101,7 +101,7 @@ More info and automated migrator: https://sass-lang.com/d/import
    '
     input.scss 19:9  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("darken"))
 
@@ -111,7 +111,7 @@ Recommendation: call(get-function("darken"))
    '
     input.scss 19:9  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -122,7 +122,7 @@ More info and automated migrator: https://sass-lang.com/d/import
    '
     input.scss 19:9  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -39.84375%)
 color.adjust($color, $lightness: -5%)
@@ -135,7 +135,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 19:9  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.call instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -147,7 +147,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     input.scss 5:11   dark()
     input.scss 20:13  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("darken"))
 
@@ -158,7 +158,7 @@ Recommendation: call(get-function("darken"))
     input.scss 5:11   dark()
     input.scss 20:13  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -170,7 +170,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     input.scss 5:11   dark()
     input.scss 20:13  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -39.84375%)
 color.adjust($color, $lightness: -5%)
@@ -184,7 +184,7 @@ More info: https://sass-lang.com/d/color-functions
     input.scss 5:11   dark()
     input.scss 20:13  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.call instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -196,7 +196,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     input.scss 11:11  dark2()
     input.scss 21:14  root stylesheet
 
-DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
+DEPRECATION WARNING [call-string]: Passing a string to call() is deprecated and will be illegal in Dart Sass 2.0.0.
 
 Recommendation: call(get-function("darken"))
 
@@ -207,7 +207,7 @@ Recommendation: call(get-function("darken"))
     input.scss 11:11  dark2()
     input.scss 21:14  root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use color.adjust instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -219,7 +219,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     input.scss 11:11  dark2()
     input.scss 21:14  root stylesheet
 
-DEPRECATION WARNING: darken() is deprecated. Suggestions:
+DEPRECATION WARNING [color-functions]: darken() is deprecated. Suggestions:
 
 color.scale($color, $lightness: -39.84375%)
 color.adjust($color, $lightness: -5%)
diff --git a/spec/libsass-closed-issues/issue_2560.hrx b/spec/libsass-closed-issues/issue_2560.hrx
index d2df83d9c..ae5bd3e30 100644
--- a/spec/libsass-closed-issues/issue_2560.hrx
+++ b/spec/libsass-closed-issues/issue_2560.hrx
@@ -12,14 +12,14 @@ test {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(10px, 5px)
 
 More info and automated migrator: https://sass-lang.com/d/slash-div
 
   ,
-1 | $x: 10px / 5px;
+1 | $x: 10px / 5px;
   |     ^^^^^^^^^^
   '
     input.scss 1:5  root stylesheet
diff --git a/spec/libsass-closed-issues/issue_2582.hrx b/spec/libsass-closed-issues/issue_2582.hrx
index 2ddd8f17d..eecca4084 100644
--- a/spec/libsass-closed-issues/issue_2582.hrx
+++ b/spec/libsass-closed-issues/issue_2582.hrx
@@ -12,7 +12,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(16px, 16px) or calc(16px / 16px)
 
@@ -24,7 +24,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:15  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(16px, 16px) or calc(16px / 16px)
 
@@ -36,7 +36,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:15  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(16px, 16px) or calc(16px / 16px)
 
diff --git a/spec/libsass-closed-issues/issue_279.hrx b/spec/libsass-closed-issues/issue_279.hrx
index aa0916a44..deab94a0c 100644
--- a/spec/libsass-closed-issues/issue_279.hrx
+++ b/spec/libsass-closed-issues/issue_279.hrx
@@ -18,7 +18,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-closed-issues/issue_439.hrx b/spec/libsass-closed-issues/issue_439.hrx
index e465a6d33..cda2837e8 100644
--- a/spec/libsass-closed-issues/issue_439.hrx
+++ b/spec/libsass-closed-issues/issue_439.hrx
@@ -16,7 +16,7 @@ ul > {
 <===> output.css
 
 <===> warning
-DEPRECATION WARNING: The selector "ul > + li + li:first-child + li + li" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "ul > + li + li:first-child + li + li" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/libsass-closed-issues/issue_442.hrx b/spec/libsass-closed-issues/issue_442.hrx
index 1a858776e..571ee288a 100644
--- a/spec/libsass-closed-issues/issue_442.hrx
+++ b/spec/libsass-closed-issues/issue_442.hrx
@@ -16,7 +16,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(100, 10) or calc(100 / 10)
 
diff --git a/spec/libsass-closed-issues/issue_590.hrx b/spec/libsass-closed-issues/issue_590.hrx
index 8376dd065..ad2908f1e 100644
--- a/spec/libsass-closed-issues/issue_590.hrx
+++ b/spec/libsass-closed-issues/issue_590.hrx
@@ -17,7 +17,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -29,7 +29,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -41,7 +41,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 5:8  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
diff --git a/spec/libsass-closed-issues/issue_702.hrx b/spec/libsass-closed-issues/issue_702.hrx
index ed286fdba..214eab18e 100644
--- a/spec/libsass-closed-issues/issue_702.hrx
+++ b/spec/libsass-closed-issues/issue_702.hrx
@@ -12,7 +12,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
diff --git a/spec/libsass-closed-issues/issue_759.hrx b/spec/libsass-closed-issues/issue_759.hrx
index 56547a5d7..baf0551fd 100644
--- a/spec/libsass-closed-issues/issue_759.hrx
+++ b/spec/libsass-closed-issues/issue_759.hrx
@@ -23,7 +23,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: !default should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !default should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -32,7 +32,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 3:19  root stylesheet
 
-DEPRECATION WARNING: !default should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !default should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -41,7 +41,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 3:28  root stylesheet
 
-DEPRECATION WARNING: !global should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !global should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -50,7 +50,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 3:45  root stylesheet
 
-DEPRECATION WARNING: !global should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !global should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -59,7 +59,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 3:53  root stylesheet
 
-DEPRECATION WARNING: !global should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !global should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -68,7 +68,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 4:18  root stylesheet
 
-DEPRECATION WARNING: !global should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !global should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -77,7 +77,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 4:26  root stylesheet
 
-DEPRECATION WARNING: !default should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !default should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -86,7 +86,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 4:43  root stylesheet
 
-DEPRECATION WARNING: !default should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !default should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -95,7 +95,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 4:52  root stylesheet
 
-DEPRECATION WARNING: !global should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !global should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -104,7 +104,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 5:27  root stylesheet
 
-DEPRECATION WARNING: !default should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !default should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -113,7 +113,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 5:35  root stylesheet
 
-DEPRECATION WARNING: !global should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !global should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -122,7 +122,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 5:44  root stylesheet
 
-DEPRECATION WARNING: !default should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !default should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -131,7 +131,7 @@ This will be an error in Dart Sass 2.0.0.
   '
     input.scss 5:52  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -142,7 +142,7 @@ unnecessary and can safely be removed.
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -153,7 +153,7 @@ unnecessary and can safely be removed.
   '
     input.scss 2:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -164,7 +164,7 @@ unnecessary and can safely be removed.
   '
     input.scss 3:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -175,7 +175,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
diff --git a/spec/libsass-closed-issues/issue_783.hrx b/spec/libsass-closed-issues/issue_783.hrx
index f6996a8e1..22d612752 100644
--- a/spec/libsass-closed-issues/issue_783.hrx
+++ b/spec/libsass-closed-issues/issue_783.hrx
@@ -128,7 +128,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($foo, $bar) or calc($foo / $bar)
 
@@ -140,7 +140,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 14:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2px, 2em)
 
@@ -152,7 +152,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 41:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2em, 2px)
 
@@ -164,7 +164,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 52:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2em, 2px)
 
@@ -176,7 +176,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 63:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2em, 2px)
 
@@ -188,7 +188,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 64:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($foo, $bar) or calc($foo / $bar)
 
@@ -200,7 +200,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 69:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2px, 2em)
 
@@ -212,7 +212,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 74:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2em, 2px)
 
@@ -224,7 +224,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 75:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2px, 2em)
 
@@ -236,7 +236,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 86:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($foo, $bar) or calc($foo / $bar)
 
@@ -248,7 +248,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 91:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2em, 2px)
 
diff --git a/spec/libsass-closed-issues/issue_86.hrx b/spec/libsass-closed-issues/issue_86.hrx
index e33d8d686..26d8ed2b8 100644
--- a/spec/libsass-closed-issues/issue_86.hrx
+++ b/spec/libsass-closed-issues/issue_86.hrx
@@ -22,7 +22,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -34,7 +34,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 6:10  root stylesheet
 
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -46,7 +46,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 7:28  root stylesheet
 
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -58,7 +58,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 8:25  root stylesheet
 
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -70,7 +70,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 9:37  root stylesheet
 
-DEPRECATION WARNING: color.hue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.hue() is deprecated. Suggestion:
 
 color.channel($color, "hue", $space: hsl)
 
@@ -82,7 +82,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 9:56  root stylesheet
 
-DEPRECATION WARNING: color.lightness() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.lightness() is deprecated. Suggestion:
 
 color.channel($color, "lightness", $space: hsl)
 
@@ -94,7 +94,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 10:26  root stylesheet
 
-DEPRECATION WARNING: color.saturation() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.saturation() is deprecated. Suggestion:
 
 color.channel($color, "saturation", $space: hsl)
 
diff --git a/spec/libsass-closed-issues/issue_893.hrx b/spec/libsass-closed-issues/issue_893.hrx
index 2cf1c16ff..175476c2a 100644
--- a/spec/libsass-closed-issues/issue_893.hrx
+++ b/spec/libsass-closed-issues/issue_893.hrx
@@ -10,7 +10,7 @@ $gutter: 20px;
 }
 
 <===> warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     0 - $gutter
 
diff --git a/spec/libsass-todo-issues/issue_1763.hrx b/spec/libsass-todo-issues/issue_1763.hrx
index 524e6a273..6c60defc0 100644
--- a/spec/libsass-todo-issues/issue_1763.hrx
+++ b/spec/libsass-todo-issues/issue_1763.hrx
@@ -17,7 +17,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-todo-issues/issue_1801/simple-import-loop.hrx b/spec/libsass-todo-issues/issue_1801/simple-import-loop.hrx
index f7dd8d787..9ca0a5b57 100644
--- a/spec/libsass-todo-issues/issue_1801/simple-import-loop.hrx
+++ b/spec/libsass-todo-issues/issue_1801/simple-import-loop.hrx
@@ -5,7 +5,7 @@
 @import 'susy';
 
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -15,7 +15,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-todo-issues/issue_2295/error/basic.hrx b/spec/libsass-todo-issues/issue_2295/error/basic.hrx
index 3c5d2e26b..1d607b906 100644
--- a/spec/libsass-todo-issues/issue_2295/error/basic.hrx
+++ b/spec/libsass-todo-issues/issue_2295/error/basic.hrx
@@ -6,7 +6,7 @@
 display: none;
 
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass-todo-issues/issue_2295/error/wrapped.hrx b/spec/libsass-todo-issues/issue_2295/error/wrapped.hrx
index 29b8d6029..947e379c4 100644
--- a/spec/libsass-todo-issues/issue_2295/error/wrapped.hrx
+++ b/spec/libsass-todo-issues/issue_2295/error/wrapped.hrx
@@ -7,7 +7,7 @@
   display: none;
 }
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/arg-eval.hrx b/spec/libsass/arg-eval.hrx
index 34fee6e62..d11ef65ed 100644
--- a/spec/libsass/arg-eval.hrx
+++ b/spec/libsass/arg-eval.hrx
@@ -30,7 +30,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2, 3)
 
@@ -42,7 +42,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 15:25  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
diff --git a/spec/libsass/at-error/feature-test.hrx b/spec/libsass/at-error/feature-test.hrx
index ab6d78653..b013fb1ac 100644
--- a/spec/libsass/at-error/feature-test.hrx
+++ b/spec/libsass/at-error/feature-test.hrx
@@ -12,7 +12,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
diff --git a/spec/libsass/at-stuff.hrx b/spec/libsass/at-stuff.hrx
index e4e181b06..6050fbec5 100644
--- a/spec/libsass/at-stuff.hrx
+++ b/spec/libsass/at-stuff.hrx
@@ -108,7 +108,7 @@ div span {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
diff --git a/spec/libsass/base-level-parent/imported/at-root-alone-itpl.hrx b/spec/libsass/base-level-parent/imported/at-root-alone-itpl.hrx
index 0bc65215b..e0e9a434c 100644
--- a/spec/libsass/base-level-parent/imported/at-root-alone-itpl.hrx
+++ b/spec/libsass/base-level-parent/imported/at-root-alone-itpl.hrx
@@ -10,7 +10,7 @@
 }
 
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/at-root-alone.hrx b/spec/libsass/base-level-parent/imported/at-root-alone.hrx
index d8808e5f9..c09d116f6 100644
--- a/spec/libsass/base-level-parent/imported/at-root-alone.hrx
+++ b/spec/libsass/base-level-parent/imported/at-root-alone.hrx
@@ -9,7 +9,7 @@
   }
 }
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/at-root-postfix-itpl.hrx b/spec/libsass/base-level-parent/imported/at-root-postfix-itpl.hrx
index 0290a9f61..9b271c648 100644
--- a/spec/libsass/base-level-parent/imported/at-root-postfix-itpl.hrx
+++ b/spec/libsass/base-level-parent/imported/at-root-postfix-itpl.hrx
@@ -15,7 +15,7 @@ post foo {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/at-root-postfix.hrx b/spec/libsass/base-level-parent/imported/at-root-postfix.hrx
index b4de8f412..d79cc3661 100644
--- a/spec/libsass/base-level-parent/imported/at-root-postfix.hrx
+++ b/spec/libsass/base-level-parent/imported/at-root-postfix.hrx
@@ -9,7 +9,7 @@
   }
 }
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/at-root-prefix-itpl.hrx b/spec/libsass/base-level-parent/imported/at-root-prefix-itpl.hrx
index cbdaa0071..7c41924fc 100644
--- a/spec/libsass/base-level-parent/imported/at-root-prefix-itpl.hrx
+++ b/spec/libsass/base-level-parent/imported/at-root-prefix-itpl.hrx
@@ -15,7 +15,7 @@ pre foo {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/at-root-prefix.hrx b/spec/libsass/base-level-parent/imported/at-root-prefix.hrx
index 48beffba5..66dff59e1 100644
--- a/spec/libsass/base-level-parent/imported/at-root-prefix.hrx
+++ b/spec/libsass/base-level-parent/imported/at-root-prefix.hrx
@@ -9,7 +9,7 @@
   }
 }
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/basic-alone-itpl.hrx b/spec/libsass/base-level-parent/imported/basic-alone-itpl.hrx
index 5d2e957c5..bdff138c6 100644
--- a/spec/libsass/base-level-parent/imported/basic-alone-itpl.hrx
+++ b/spec/libsass/base-level-parent/imported/basic-alone-itpl.hrx
@@ -8,7 +8,7 @@
 }
 
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/basic-alone.hrx b/spec/libsass/base-level-parent/imported/basic-alone.hrx
index d8d0fd5fc..73f565206 100644
--- a/spec/libsass/base-level-parent/imported/basic-alone.hrx
+++ b/spec/libsass/base-level-parent/imported/basic-alone.hrx
@@ -8,7 +8,7 @@
 }
 
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/basic-postfix-itpl.hrx b/spec/libsass/base-level-parent/imported/basic-postfix-itpl.hrx
index e27a61168..dcb40a87e 100644
--- a/spec/libsass/base-level-parent/imported/basic-postfix-itpl.hrx
+++ b/spec/libsass/base-level-parent/imported/basic-postfix-itpl.hrx
@@ -13,7 +13,7 @@ post foo {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/basic-postfix.hrx b/spec/libsass/base-level-parent/imported/basic-postfix.hrx
index cc4371a0a..8a20616c4 100644
--- a/spec/libsass/base-level-parent/imported/basic-postfix.hrx
+++ b/spec/libsass/base-level-parent/imported/basic-postfix.hrx
@@ -7,7 +7,7 @@
   }
 }
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/basic-prefix-itpl.hrx b/spec/libsass/base-level-parent/imported/basic-prefix-itpl.hrx
index d972520c2..e55d083f3 100644
--- a/spec/libsass/base-level-parent/imported/basic-prefix-itpl.hrx
+++ b/spec/libsass/base-level-parent/imported/basic-prefix-itpl.hrx
@@ -13,7 +13,7 @@ pre foo {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/base-level-parent/imported/basic-prefix.hrx b/spec/libsass/base-level-parent/imported/basic-prefix.hrx
index 84d7c648c..9f97ebb25 100644
--- a/spec/libsass/base-level-parent/imported/basic-prefix.hrx
+++ b/spec/libsass/base-level-parent/imported/basic-prefix.hrx
@@ -7,7 +7,7 @@ pre& {
   }
 }
 <===> error
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/libsass/bourbon.hrx b/spec/libsass/bourbon.hrx
index b828468ff..dbca99808 100644
--- a/spec/libsass/bourbon.hrx
+++ b/spec/libsass/bourbon.hrx
@@ -1932,7 +1932,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -1942,7 +1942,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 2:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -1953,7 +1953,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 2:9  @import
     input.scss 2:9         root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -1964,7 +1964,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 3:9  @import
     input.scss 2:9         root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -1975,7 +1975,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 4:9  @import
     input.scss 2:9         root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -1986,7 +1986,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 5:9  @import
     input.scss 2:9         root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -1997,7 +1997,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 6:9  @import
     input.scss 2:9         root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2008,7 +2008,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 7:9  @import
     input.scss 2:9         root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2019,7 +2019,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 8:9  @import
     input.scss 2:9         root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2030,7 +2030,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 11:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2041,7 +2041,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 12:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2052,7 +2052,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 13:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2063,7 +2063,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 14:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2074,7 +2074,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 15:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2085,7 +2085,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 16:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2096,7 +2096,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 17:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2107,7 +2107,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 18:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2118,7 +2118,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 19:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2129,7 +2129,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 22:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2140,7 +2140,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 23:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2151,7 +2151,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 24:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2162,7 +2162,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 25:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2173,7 +2173,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 26:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2184,7 +2184,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 27:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2195,7 +2195,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 28:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2206,7 +2206,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 29:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2217,7 +2217,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 30:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2228,7 +2228,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 31:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2239,7 +2239,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 32:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2250,7 +2250,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 33:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2261,7 +2261,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 34:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2272,7 +2272,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 35:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2283,7 +2283,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 36:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2294,7 +2294,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 37:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2305,7 +2305,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 38:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2316,7 +2316,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 39:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2327,7 +2327,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 40:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2338,7 +2338,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 41:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2349,7 +2349,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 42:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2360,7 +2360,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 43:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2371,7 +2371,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 46:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2382,7 +2382,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 47:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2393,7 +2393,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 48:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2404,7 +2404,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 49:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2415,7 +2415,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 50:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2426,7 +2426,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 51:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2437,7 +2437,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 52:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2448,7 +2448,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 53:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2459,7 +2459,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 54:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2470,7 +2470,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 55:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2481,7 +2481,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 56:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -2492,7 +2492,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 59:9  @import
     input.scss 2:9          root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.unquote instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2505,7 +2505,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 50:9                    @import
     input.scss 2:9                            root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.append instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2518,7 +2518,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 50:9                    @import
     input.scss 2:9                            root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.append instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2531,7 +2531,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 50:9                    @import
     input.scss 2:9                            root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.append instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2544,7 +2544,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/_bourbon.scss 50:9                    @import
     input.scss 2:9                            root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.length instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2557,7 +2557,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 19:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2570,7 +2570,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 19:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.type-of instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2583,7 +2583,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 19:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2596,7 +2596,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 19:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.join instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2609,7 +2609,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 19:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2621,7 +2621,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/functions/_linear-gradient.scss 3:22  linear-gradient()
     input.scss 22:51                          root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use meta.type-of instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2633,7 +2633,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/functions/_linear-gradient.scss 3:14  linear-gradient()
     input.scss 22:51                          root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.zip instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2645,7 +2645,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/functions/_linear-gradient.scss 7:17  linear-gradient()
     input.scss 22:51                          root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2658,7 +2658,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 22:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2671,7 +2671,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 22:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2684,7 +2684,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 22:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2697,7 +2697,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 22:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2710,7 +2710,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 22:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2723,7 +2723,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 22:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.append instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2736,7 +2736,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 22:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.unquote instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2750,7 +2750,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 8:21      background-image()
     input.scss 22:3                           root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -2763,7 +2763,7 @@ More info and automated migrator: https://sass-lang.com/d/import
     lib/css3/_background-image.scss 7:21   background-image()
     input.scss 29:3                        root stylesheet
 
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.nth instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/libsass/conversions.hrx b/spec/libsass/conversions.hrx
index d85cc15ca..2df8b7e12 100644
--- a/spec/libsass/conversions.hrx
+++ b/spec/libsass/conversions.hrx
@@ -12,7 +12,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3cm * 2in * 2in, 1cm) or calc(3cm * 2in * 2in / 1cm)
 
@@ -24,7 +24,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(3cm * 2in * 2in, 1cm), 1cm) or calc(3cm * 2in * 2in / 1cm / 1cm)
 
@@ -36,7 +36,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3cm * 2in, 1cm) or calc(3cm * 2in / 1cm)
 
@@ -48,7 +48,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(12in, 3in) or calc(12in / 3in)
 
diff --git a/spec/libsass/delayed.hrx b/spec/libsass/delayed.hrx
index 95116a184..852ac39bd 100644
--- a/spec/libsass/delayed.hrx
+++ b/spec/libsass/delayed.hrx
@@ -70,7 +70,7 @@ span {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -82,7 +82,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 11:8  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -94,7 +94,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:13  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(15, list.nth($x, 2)) or calc(15 / list.nth($x, 2))
 
@@ -106,7 +106,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:8  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -118,7 +118,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 13:14  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -130,7 +130,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 14:14  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(2, 3), list.nth($x, 2)) or calc(2 / 3 / list.nth($x, 2))
 
@@ -142,7 +142,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 14:8  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -154,7 +154,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:5  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -170,7 +170,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
 WARNING: 2/3
     input.scss 22:3  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -185,7 +185,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
 WARNING: blah blah
     input.scss 32:1  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -197,7 +197,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 35:15  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4) or calc(3 / 4)
 
diff --git a/spec/libsass/div.hrx b/spec/libsass/div.hrx
index e1ff67b9f..38e7001ce 100644
--- a/spec/libsass/div.hrx
+++ b/spec/libsass/div.hrx
@@ -27,7 +27,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -39,7 +39,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:5  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -51,7 +51,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -63,7 +63,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 13:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
diff --git a/spec/libsass/list-evaluation.hrx b/spec/libsass/list-evaluation.hrx
index fa96c0472..bf43e9c7d 100644
--- a/spec/libsass/list-evaluation.hrx
+++ b/spec/libsass/list-evaluation.hrx
@@ -41,7 +41,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2, 3)
 
@@ -53,7 +53,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 6:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2, 3)
 
@@ -65,7 +65,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 7:25  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -77,7 +77,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 13:15  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1 + 2, 3) or calc((1 + 2) / 3)
 
@@ -89,7 +89,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 19:11  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1 + 2, 3), 4) or calc((1 + 2) / 3 / 4)
 
diff --git a/spec/libsass/lists.hrx b/spec/libsass/lists.hrx
index e8f43d74f..7fb335e8a 100644
--- a/spec/libsass/lists.hrx
+++ b/spec/libsass/lists.hrx
@@ -48,7 +48,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -60,7 +60,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 11:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -72,7 +72,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 11:30  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -84,7 +84,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 15:25  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -96,7 +96,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 16:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
diff --git a/spec/libsass/media.hrx b/spec/libsass/media.hrx
index acf7fa8f1..c562928c9 100644
--- a/spec/libsass/media.hrx
+++ b/spec/libsass/media.hrx
@@ -208,7 +208,7 @@ div span {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
diff --git a/spec/libsass/mixin.hrx b/spec/libsass/mixin.hrx
index 11c438f00..a764289db 100644
--- a/spec/libsass/mixin.hrx
+++ b/spec/libsass/mixin.hrx
@@ -94,7 +94,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
diff --git a/spec/libsass/multi-blocks.hrx b/spec/libsass/multi-blocks.hrx
index 82a3534cb..b8b573428 100644
--- a/spec/libsass/multi-blocks.hrx
+++ b/spec/libsass/multi-blocks.hrx
@@ -125,7 +125,7 @@ a b c d e f {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
diff --git a/spec/libsass/rel.hrx b/spec/libsass/rel.hrx
index ab3884c85..30a157ee4 100644
--- a/spec/libsass/rel.hrx
+++ b/spec/libsass/rel.hrx
@@ -45,7 +45,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px, 1pt) or calc(1px / 1pt)
 
@@ -57,7 +57,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1cm * 1in, 1cm) or calc(1cm * 1in / 1cm)
 
@@ -69,7 +69,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:17  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1cm * 1in, 1cm) or calc(1cm * 1in / 1cm)
 
@@ -81,7 +81,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 13:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1cm * 1in, 1in) or calc(1cm * 1in / 1in)
 
@@ -93,7 +93,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 14:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2cm * 1in, 2cm) or calc(2cm * 1in / 2cm)
 
@@ -105,7 +105,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 15:8  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1in * 2cm, 2cm) or calc(1in * 2cm / 2cm)
 
@@ -117,7 +117,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 15:25  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1cm, 1in) or calc(1cm / 1in)
 
@@ -129,7 +129,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 16:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1in * 2.54cm, 1in) or calc(1in * 2.54cm / 1in)
 
diff --git a/spec/libsass/test.hrx b/spec/libsass/test.hrx
index 3e82b2841..c26a3ff36 100644
--- a/spec/libsass/test.hrx
+++ b/spec/libsass/test.hrx
@@ -153,7 +153,7 @@ h1:lang(en) {
 }
 
 <===> warning
-DEPRECATION WARNING: $n: Passing a number with unit px is deprecated.
+DEPRECATION WARNING [function-units]: $n: Passing a number with unit px is deprecated.
 
 To preserve current behavior: calc($n / 1px)
 
diff --git a/spec/libsass/units/conversion/angle.hrx b/spec/libsass/units/conversion/angle.hrx
index d3a884541..e0aab77bc 100644
--- a/spec/libsass/units/conversion/angle.hrx
+++ b/spec/libsass/units/conversion/angle.hrx
@@ -103,7 +103,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2deg, 1deg) or calc(4.2deg / 1deg)
 
@@ -115,7 +115,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2deg * 1deg, 1deg) or calc(4.2deg * 1deg / 1deg)
 
@@ -127,7 +127,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2deg, 1grad) or calc(4.2deg / 1grad)
 
@@ -139,7 +139,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 6:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2deg * 1grad, 1deg) or calc(4.2deg * 1grad / 1deg)
 
@@ -151,7 +151,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 7:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2deg, 1rad) or calc(4.2deg / 1rad)
 
@@ -163,7 +163,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 9:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2deg * 1rad, 1deg) or calc(4.2deg * 1rad / 1deg)
 
@@ -175,7 +175,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 10:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2deg, 1turn) or calc(4.2deg / 1turn)
 
@@ -187,7 +187,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2deg * 1turn, 1deg) or calc(4.2deg * 1turn / 1deg)
 
@@ -199,7 +199,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 13:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2grad, 1deg) or calc(4.2grad / 1deg)
 
@@ -211,7 +211,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 15:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2grad * 1deg, 1grad) or calc(4.2grad * 1deg / 1grad)
 
@@ -223,7 +223,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 16:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2grad, 1grad) or calc(4.2grad / 1grad)
 
@@ -235,7 +235,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 18:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2grad * 1grad, 1grad) or calc(4.2grad * 1grad / 1grad)
 
@@ -247,7 +247,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 19:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2grad, 1rad) or calc(4.2grad / 1rad)
 
@@ -259,7 +259,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 21:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2grad * 1rad, 1grad) or calc(4.2grad * 1rad / 1grad)
 
@@ -271,7 +271,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 22:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2grad, 1turn) or calc(4.2grad / 1turn)
 
@@ -283,7 +283,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 24:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2grad * 1turn, 1grad) or calc(4.2grad * 1turn / 1grad)
 
@@ -295,7 +295,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 25:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2rad, 1deg) or calc(4.2rad / 1deg)
 
@@ -307,7 +307,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 27:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2rad * 1deg, 1rad) or calc(4.2rad * 1deg / 1rad)
 
@@ -319,7 +319,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 28:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2rad, 1grad) or calc(4.2rad / 1grad)
 
@@ -331,7 +331,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 30:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2rad * 1grad, 1rad) or calc(4.2rad * 1grad / 1rad)
 
@@ -343,7 +343,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 31:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2rad, 1rad) or calc(4.2rad / 1rad)
 
@@ -355,7 +355,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 33:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2rad * 1rad, 1rad) or calc(4.2rad * 1rad / 1rad)
 
@@ -367,7 +367,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 34:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2rad, 1turn) or calc(4.2rad / 1turn)
 
@@ -379,7 +379,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 36:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2rad * 1turn, 1rad) or calc(4.2rad * 1turn / 1rad)
 
@@ -391,7 +391,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 37:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2turn, 1deg) or calc(4.2turn / 1deg)
 
@@ -403,7 +403,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 39:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2turn * 1deg, 1turn) or calc(4.2turn * 1deg / 1turn)
 
@@ -415,7 +415,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 40:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2turn, 1grad) or calc(4.2turn / 1grad)
 
@@ -427,7 +427,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 42:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2turn * 1grad, 1turn) or calc(4.2turn * 1grad / 1turn)
 
@@ -439,7 +439,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 43:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2turn, 1rad) or calc(4.2turn / 1rad)
 
@@ -451,7 +451,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 45:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2turn * 1rad, 1turn) or calc(4.2turn * 1rad / 1turn)
 
@@ -463,7 +463,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 46:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2turn, 1turn) or calc(4.2turn / 1turn)
 
@@ -475,7 +475,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 48:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2turn * 1turn, 1turn) or calc(4.2turn * 1turn / 1turn)
 
diff --git a/spec/libsass/units/conversion/frequency.hrx b/spec/libsass/units/conversion/frequency.hrx
index 9e28d9f76..5a738a42a 100644
--- a/spec/libsass/units/conversion/frequency.hrx
+++ b/spec/libsass/units/conversion/frequency.hrx
@@ -31,7 +31,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2Hz, 1Hz) or calc(4.2Hz / 1Hz)
 
@@ -43,7 +43,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2Hz * 1Hz, 1Hz) or calc(4.2Hz * 1Hz / 1Hz)
 
@@ -55,7 +55,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2Hz, 1kHz) or calc(4.2Hz / 1kHz)
 
@@ -67,7 +67,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 6:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2Hz * 1kHz, 1Hz) or calc(4.2Hz * 1kHz / 1Hz)
 
@@ -79,7 +79,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 7:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2kHz, 1Hz) or calc(4.2kHz / 1Hz)
 
@@ -91,7 +91,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 9:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2kHz * 1Hz, 1kHz) or calc(4.2kHz * 1Hz / 1kHz)
 
@@ -103,7 +103,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 10:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2kHz, 1kHz) or calc(4.2kHz / 1kHz)
 
@@ -115,7 +115,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2kHz * 1kHz, 1kHz) or calc(4.2kHz * 1kHz / 1kHz)
 
diff --git a/spec/libsass/units/conversion/resolution.hrx b/spec/libsass/units/conversion/resolution.hrx
index 298724c35..6e58ae924 100644
--- a/spec/libsass/units/conversion/resolution.hrx
+++ b/spec/libsass/units/conversion/resolution.hrx
@@ -61,7 +61,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpi, 1dpi) or calc(4.2dpi / 1dpi)
 
@@ -73,7 +73,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpi * 1dpi, 1dpi) or calc(4.2dpi * 1dpi / 1dpi)
 
@@ -85,7 +85,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpi, 1dpcm) or calc(4.2dpi / 1dpcm)
 
@@ -97,7 +97,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 6:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpi * 1dpcm, 1dpi) or calc(4.2dpi * 1dpcm / 1dpi)
 
@@ -109,7 +109,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 7:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpi, 1dppx) or calc(4.2dpi / 1dppx)
 
@@ -121,7 +121,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 9:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpi * 1dppx, 1dpi) or calc(4.2dpi * 1dppx / 1dpi)
 
@@ -133,7 +133,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 10:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpcm, 1dpi) or calc(4.2dpcm / 1dpi)
 
@@ -145,7 +145,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpcm * 1dpi, 1dpcm) or calc(4.2dpcm * 1dpi / 1dpcm)
 
@@ -157,7 +157,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 13:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpcm, 1dpcm) or calc(4.2dpcm / 1dpcm)
 
@@ -169,7 +169,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 15:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpcm * 1dpcm, 1dpcm) or calc(4.2dpcm * 1dpcm / 1dpcm)
 
@@ -181,7 +181,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 16:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpcm, 1dppx) or calc(4.2dpcm / 1dppx)
 
@@ -193,7 +193,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 18:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dpcm * 1dppx, 1dpcm) or calc(4.2dpcm * 1dppx / 1dpcm)
 
@@ -205,7 +205,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 19:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dppx, 1dpi) or calc(4.2dppx / 1dpi)
 
@@ -217,7 +217,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 21:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dppx * 1dpi, 1dppx) or calc(4.2dppx * 1dpi / 1dppx)
 
@@ -229,7 +229,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 22:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dppx, 1dpcm) or calc(4.2dppx / 1dpcm)
 
@@ -241,7 +241,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 24:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dppx * 1dpcm, 1dppx) or calc(4.2dppx * 1dpcm / 1dppx)
 
@@ -253,7 +253,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 25:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dppx, 1dppx) or calc(4.2dppx / 1dppx)
 
@@ -265,7 +265,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 27:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2dppx * 1dppx, 1dppx) or calc(4.2dppx * 1dppx / 1dppx)
 
diff --git a/spec/libsass/units/conversion/size.hrx b/spec/libsass/units/conversion/size.hrx
index 178e6634c..4b55dd7e5 100644
--- a/spec/libsass/units/conversion/size.hrx
+++ b/spec/libsass/units/conversion/size.hrx
@@ -223,7 +223,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px, 1px) or calc(4.2px / 1px)
 
@@ -235,7 +235,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px * 1px, 1px) or calc(4.2px * 1px / 1px)
 
@@ -247,7 +247,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px, 1pt) or calc(4.2px / 1pt)
 
@@ -259,7 +259,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 6:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px * 1pt, 1px) or calc(4.2px * 1pt / 1px)
 
@@ -271,7 +271,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 7:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px, 1pc) or calc(4.2px / 1pc)
 
@@ -283,7 +283,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 9:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px * 1pc, 1px) or calc(4.2px * 1pc / 1px)
 
@@ -295,7 +295,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 10:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px, 1mm) or calc(4.2px / 1mm)
 
@@ -307,7 +307,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px * 1mm, 1px) or calc(4.2px * 1mm / 1px)
 
@@ -319,7 +319,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 13:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px, 1cm) or calc(4.2px / 1cm)
 
@@ -331,7 +331,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 15:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px * 1cm, 1px) or calc(4.2px * 1cm / 1px)
 
@@ -343,7 +343,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 16:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px, 1in) or calc(4.2px / 1in)
 
@@ -355,7 +355,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 18:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2px * 1in, 1px) or calc(4.2px * 1in / 1px)
 
@@ -367,7 +367,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 19:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt, 1px) or calc(4.2pt / 1px)
 
@@ -379,7 +379,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 21:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt * 1px, 1pt) or calc(4.2pt * 1px / 1pt)
 
@@ -391,7 +391,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 22:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt, 1pt) or calc(4.2pt / 1pt)
 
@@ -403,7 +403,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 24:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt * 1pt, 1pt) or calc(4.2pt * 1pt / 1pt)
 
@@ -415,7 +415,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 25:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt, 1pc) or calc(4.2pt / 1pc)
 
@@ -427,7 +427,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 27:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt * 1pc, 1pt) or calc(4.2pt * 1pc / 1pt)
 
@@ -439,7 +439,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 28:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt, 1mm) or calc(4.2pt / 1mm)
 
@@ -451,7 +451,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 30:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt * 1mm, 1pt) or calc(4.2pt * 1mm / 1pt)
 
@@ -463,7 +463,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 31:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt, 1cm) or calc(4.2pt / 1cm)
 
@@ -475,7 +475,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 33:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt * 1cm, 1pt) or calc(4.2pt * 1cm / 1pt)
 
@@ -487,7 +487,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 34:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt, 1in) or calc(4.2pt / 1in)
 
@@ -499,7 +499,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 36:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pt * 1in, 1pt) or calc(4.2pt * 1in / 1pt)
 
@@ -511,7 +511,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 37:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc, 1px) or calc(4.2pc / 1px)
 
@@ -523,7 +523,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 39:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc * 1px, 1pc) or calc(4.2pc * 1px / 1pc)
 
@@ -535,7 +535,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 40:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc, 1pt) or calc(4.2pc / 1pt)
 
@@ -547,7 +547,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 42:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc * 1pt, 1pc) or calc(4.2pc * 1pt / 1pc)
 
@@ -559,7 +559,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 43:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc, 1pc) or calc(4.2pc / 1pc)
 
@@ -571,7 +571,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 45:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc * 1pc, 1pc) or calc(4.2pc * 1pc / 1pc)
 
@@ -583,7 +583,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 46:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc, 1mm) or calc(4.2pc / 1mm)
 
@@ -595,7 +595,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 48:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc * 1mm, 1pc) or calc(4.2pc * 1mm / 1pc)
 
@@ -607,7 +607,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 49:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc, 1cm) or calc(4.2pc / 1cm)
 
@@ -619,7 +619,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 51:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc * 1cm, 1pc) or calc(4.2pc * 1cm / 1pc)
 
@@ -631,7 +631,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 52:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc, 1in) or calc(4.2pc / 1in)
 
@@ -643,7 +643,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 54:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2pc * 1in, 1pc) or calc(4.2pc * 1in / 1pc)
 
@@ -655,7 +655,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 55:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm, 1px) or calc(4.2mm / 1px)
 
@@ -667,7 +667,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 57:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm * 1px, 1mm) or calc(4.2mm * 1px / 1mm)
 
@@ -679,7 +679,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 58:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm, 1pt) or calc(4.2mm / 1pt)
 
@@ -691,7 +691,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 60:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm * 1pt, 1mm) or calc(4.2mm * 1pt / 1mm)
 
@@ -703,7 +703,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 61:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm, 1pc) or calc(4.2mm / 1pc)
 
@@ -715,7 +715,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 63:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm * 1pc, 1mm) or calc(4.2mm * 1pc / 1mm)
 
@@ -727,7 +727,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 64:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm, 1mm) or calc(4.2mm / 1mm)
 
@@ -739,7 +739,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 66:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm * 1mm, 1mm) or calc(4.2mm * 1mm / 1mm)
 
@@ -751,7 +751,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 67:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm, 1cm) or calc(4.2mm / 1cm)
 
@@ -763,7 +763,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 69:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm * 1cm, 1mm) or calc(4.2mm * 1cm / 1mm)
 
@@ -775,7 +775,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 70:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm, 1in) or calc(4.2mm / 1in)
 
@@ -787,7 +787,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 72:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2mm * 1in, 1mm) or calc(4.2mm * 1in / 1mm)
 
@@ -799,7 +799,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 73:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm, 1px) or calc(4.2cm / 1px)
 
@@ -811,7 +811,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 75:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm * 1px, 1cm) or calc(4.2cm * 1px / 1cm)
 
@@ -823,7 +823,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 76:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm, 1pt) or calc(4.2cm / 1pt)
 
@@ -835,7 +835,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 78:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm * 1pt, 1cm) or calc(4.2cm * 1pt / 1cm)
 
@@ -847,7 +847,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 79:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm, 1pc) or calc(4.2cm / 1pc)
 
@@ -859,7 +859,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 81:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm * 1pc, 1cm) or calc(4.2cm * 1pc / 1cm)
 
@@ -871,7 +871,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 82:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm, 1mm) or calc(4.2cm / 1mm)
 
@@ -883,7 +883,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 84:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm * 1mm, 1cm) or calc(4.2cm * 1mm / 1cm)
 
@@ -895,7 +895,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 85:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm, 1cm) or calc(4.2cm / 1cm)
 
@@ -907,7 +907,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 87:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm * 1cm, 1cm) or calc(4.2cm * 1cm / 1cm)
 
@@ -919,7 +919,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 88:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm, 1in) or calc(4.2cm / 1in)
 
@@ -931,7 +931,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 90:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2cm * 1in, 1cm) or calc(4.2cm * 1in / 1cm)
 
@@ -943,7 +943,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 91:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in, 1px) or calc(4.2in / 1px)
 
@@ -955,7 +955,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 93:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in * 1px, 1in) or calc(4.2in * 1px / 1in)
 
@@ -967,7 +967,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 94:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in, 1pt) or calc(4.2in / 1pt)
 
@@ -979,7 +979,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 96:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in * 1pt, 1in) or calc(4.2in * 1pt / 1in)
 
@@ -991,7 +991,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 97:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in, 1pc) or calc(4.2in / 1pc)
 
@@ -1003,7 +1003,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 99:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in * 1pc, 1in) or calc(4.2in * 1pc / 1in)
 
@@ -1015,7 +1015,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
     '
     input.scss 100:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in, 1mm) or calc(4.2in / 1mm)
 
@@ -1027,7 +1027,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
     '
     input.scss 102:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in * 1mm, 1in) or calc(4.2in * 1mm / 1in)
 
@@ -1039,7 +1039,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
     '
     input.scss 103:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in, 1cm) or calc(4.2in / 1cm)
 
@@ -1051,7 +1051,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
     '
     input.scss 105:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in * 1cm, 1in) or calc(4.2in * 1cm / 1in)
 
@@ -1063,7 +1063,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
     '
     input.scss 106:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in, 1in) or calc(4.2in / 1in)
 
@@ -1075,7 +1075,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
     '
     input.scss 108:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2in * 1in, 1in) or calc(4.2in * 1in / 1in)
 
diff --git a/spec/libsass/units/conversion/time.hrx b/spec/libsass/units/conversion/time.hrx
index 987f0f1c9..3eab5c68a 100644
--- a/spec/libsass/units/conversion/time.hrx
+++ b/spec/libsass/units/conversion/time.hrx
@@ -31,7 +31,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2s, 1s) or calc(4.2s / 1s)
 
@@ -43,7 +43,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2s * 1s, 1s) or calc(4.2s * 1s / 1s)
 
@@ -55,7 +55,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2s, 1ms) or calc(4.2s / 1ms)
 
@@ -67,7 +67,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 6:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2s * 1ms, 1s) or calc(4.2s * 1ms / 1s)
 
@@ -79,7 +79,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 7:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2ms, 1s) or calc(4.2ms / 1s)
 
@@ -91,7 +91,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 9:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2ms * 1s, 1ms) or calc(4.2ms * 1s / 1ms)
 
@@ -103,7 +103,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 10:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2ms, 1ms) or calc(4.2ms / 1ms)
 
@@ -115,7 +115,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 12:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(4.2ms * 1ms, 1ms) or calc(4.2ms * 1ms / 1ms)
 
diff --git a/spec/libsass/units/feature-test.hrx b/spec/libsass/units/feature-test.hrx
index f419c1c1b..90bbd9ecc 100644
--- a/spec/libsass/units/feature-test.hrx
+++ b/spec/libsass/units/feature-test.hrx
@@ -12,7 +12,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
diff --git a/spec/libsass/units/simple.hrx b/spec/libsass/units/simple.hrx
index 440c37ed8..7599baf3c 100644
--- a/spec/libsass/units/simple.hrx
+++ b/spec/libsass/units/simple.hrx
@@ -15,7 +15,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div((5in + 3cm) * 10px * 100pt * 10fu, 2px) or calc((5in + 3cm) * 10px * 100pt * 10fu / 2px)
 
@@ -27,7 +27,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div((5in + 3cm) * 10px * 100pt * 10fu, 2px), 2fu) or calc((5in + 3cm) * 10px * 100pt * 10fu / 2px / 2fu)
 
@@ -39,7 +39,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(math.div((5in + 3cm) * 10px * 100pt * 10fu, 2px), 2fu), 3pt) or calc((5in + 3cm) * 10px * 100pt * 10fu / 2px / 2fu / 3pt)
 
@@ -51,7 +51,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(23in, 2fu) or calc(23in / 2fu)
 
@@ -63,7 +63,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:8  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(23cm, 2fu) or calc(23cm / 2fu)
 
@@ -75,7 +75,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:21  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(23px, 2fu) or calc(23px / 2fu)
 
@@ -87,7 +87,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 5:19  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(23px, 2fu), 12emu) or calc(23px / 2fu / 12emu)
 
@@ -99,7 +99,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 5:19  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(math.div(23px, 2fu), 12emu), 1.2gnu) or calc(23px / 2fu / 12emu / 1.2gnu)
 
@@ -111,7 +111,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 5:19  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2in, 3cm) or calc(2in / 3cm)
 
@@ -123,7 +123,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 6:19  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(2in, 3cm), 4cm) or calc(2in / 3cm / 4cm)
 
diff --git a/spec/libsass/variable-scoping/blead-global/expanding/at-root.hrx b/spec/libsass/variable-scoping/blead-global/expanding/at-root.hrx
index fb94fe3b6..4ac02b33f 100644
--- a/spec/libsass/variable-scoping/blead-global/expanding/at-root.hrx
+++ b/spec/libsass/variable-scoping/blead-global/expanding/at-root.hrx
@@ -45,7 +45,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -56,7 +56,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/expanding/each.hrx b/spec/libsass/variable-scoping/blead-global/expanding/each.hrx
index a6499b2f1..b85a9d278 100644
--- a/spec/libsass/variable-scoping/blead-global/expanding/each.hrx
+++ b/spec/libsass/variable-scoping/blead-global/expanding/each.hrx
@@ -51,7 +51,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -62,7 +62,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/expanding/else.hrx b/spec/libsass/variable-scoping/blead-global/expanding/else.hrx
index eb3e2c1e8..e38a36af5 100644
--- a/spec/libsass/variable-scoping/blead-global/expanding/else.hrx
+++ b/spec/libsass/variable-scoping/blead-global/expanding/else.hrx
@@ -51,7 +51,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -62,7 +62,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/expanding/elseif.hrx b/spec/libsass/variable-scoping/blead-global/expanding/elseif.hrx
index 0a241ce8b..5f404d8dc 100644
--- a/spec/libsass/variable-scoping/blead-global/expanding/elseif.hrx
+++ b/spec/libsass/variable-scoping/blead-global/expanding/elseif.hrx
@@ -51,7 +51,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -62,7 +62,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/expanding/for.hrx b/spec/libsass/variable-scoping/blead-global/expanding/for.hrx
index 58d14e16d..13b70eba8 100644
--- a/spec/libsass/variable-scoping/blead-global/expanding/for.hrx
+++ b/spec/libsass/variable-scoping/blead-global/expanding/for.hrx
@@ -52,7 +52,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -63,7 +63,7 @@ unnecessary and can safely be removed.
   '
     input.scss 5:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/expanding/function.hrx b/spec/libsass/variable-scoping/blead-global/expanding/function.hrx
index 8efe333ca..47912b483 100644
--- a/spec/libsass/variable-scoping/blead-global/expanding/function.hrx
+++ b/spec/libsass/variable-scoping/blead-global/expanding/function.hrx
@@ -59,7 +59,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -70,7 +70,7 @@ unnecessary and can safely be removed.
   '
     input.scss 6:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/expanding/if.hrx b/spec/libsass/variable-scoping/blead-global/expanding/if.hrx
index 43a9f54e6..47271412a 100644
--- a/spec/libsass/variable-scoping/blead-global/expanding/if.hrx
+++ b/spec/libsass/variable-scoping/blead-global/expanding/if.hrx
@@ -45,7 +45,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -56,7 +56,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/expanding/mixin.hrx b/spec/libsass/variable-scoping/blead-global/expanding/mixin.hrx
index 597c026d9..532376d9b 100644
--- a/spec/libsass/variable-scoping/blead-global/expanding/mixin.hrx
+++ b/spec/libsass/variable-scoping/blead-global/expanding/mixin.hrx
@@ -49,7 +49,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -60,7 +60,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/expanding/ruleset.hrx b/spec/libsass/variable-scoping/blead-global/expanding/ruleset.hrx
index dee6efcf3..5ebb77367 100644
--- a/spec/libsass/variable-scoping/blead-global/expanding/ruleset.hrx
+++ b/spec/libsass/variable-scoping/blead-global/expanding/ruleset.hrx
@@ -45,7 +45,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -56,7 +56,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/expanding/while.hrx b/spec/libsass/variable-scoping/blead-global/expanding/while.hrx
index 96691cb5f..3a5f09577 100644
--- a/spec/libsass/variable-scoping/blead-global/expanding/while.hrx
+++ b/spec/libsass/variable-scoping/blead-global/expanding/while.hrx
@@ -57,7 +57,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -68,7 +68,7 @@ unnecessary and can safely be removed.
   '
     input.scss 6:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/functional/each.hrx b/spec/libsass/variable-scoping/blead-global/functional/each.hrx
index 896f58845..ecb5446a8 100644
--- a/spec/libsass/variable-scoping/blead-global/functional/each.hrx
+++ b/spec/libsass/variable-scoping/blead-global/functional/each.hrx
@@ -70,7 +70,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -81,7 +81,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
@@ -92,7 +92,7 @@ Recommendation: add `$local_explicit: null` at the stylesheet root.
     input.scss 12:5  fn()
     input.scss 30:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_implicit: null` at the stylesheet root.
 
@@ -103,7 +103,7 @@ Recommendation: add `$check_implicit: null` at the stylesheet root.
     input.scss 23:3  fn()
     input.scss 30:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_explicit: null` at the stylesheet root.
 
@@ -114,7 +114,7 @@ Recommendation: add `$check_explicit: null` at the stylesheet root.
     input.scss 24:3  fn()
     input.scss 30:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_default: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/functional/else.hrx b/spec/libsass/variable-scoping/blead-global/functional/else.hrx
index db098b78d..5fb4db161 100644
--- a/spec/libsass/variable-scoping/blead-global/functional/else.hrx
+++ b/spec/libsass/variable-scoping/blead-global/functional/else.hrx
@@ -76,7 +76,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -87,7 +87,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
@@ -98,7 +98,7 @@ Recommendation: add `$local_explicit: null` at the stylesheet root.
     input.scss 15:5  fn()
     input.scss 36:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_implicit: null` at the stylesheet root.
 
@@ -109,7 +109,7 @@ Recommendation: add `$check_implicit: null` at the stylesheet root.
     input.scss 29:3  fn()
     input.scss 36:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_explicit: null` at the stylesheet root.
 
@@ -120,7 +120,7 @@ Recommendation: add `$check_explicit: null` at the stylesheet root.
     input.scss 30:3  fn()
     input.scss 36:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_default: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/functional/elseif.hrx b/spec/libsass/variable-scoping/blead-global/functional/elseif.hrx
index 666b9a479..d0d30692d 100644
--- a/spec/libsass/variable-scoping/blead-global/functional/elseif.hrx
+++ b/spec/libsass/variable-scoping/blead-global/functional/elseif.hrx
@@ -76,7 +76,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -87,7 +87,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
@@ -98,7 +98,7 @@ Recommendation: add `$local_explicit: null` at the stylesheet root.
     input.scss 15:5  fn()
     input.scss 36:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_implicit: null` at the stylesheet root.
 
@@ -109,7 +109,7 @@ Recommendation: add `$check_implicit: null` at the stylesheet root.
     input.scss 29:3  fn()
     input.scss 36:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_explicit: null` at the stylesheet root.
 
@@ -120,7 +120,7 @@ Recommendation: add `$check_explicit: null` at the stylesheet root.
     input.scss 30:3  fn()
     input.scss 36:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_default: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/functional/for.hrx b/spec/libsass/variable-scoping/blead-global/functional/for.hrx
index f15fdb358..314d6ef73 100644
--- a/spec/libsass/variable-scoping/blead-global/functional/for.hrx
+++ b/spec/libsass/variable-scoping/blead-global/functional/for.hrx
@@ -70,7 +70,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -81,7 +81,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
@@ -92,7 +92,7 @@ Recommendation: add `$local_explicit: null` at the stylesheet root.
     input.scss 12:5  fn()
     input.scss 30:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_implicit: null` at the stylesheet root.
 
@@ -103,7 +103,7 @@ Recommendation: add `$check_implicit: null` at the stylesheet root.
     input.scss 23:3  fn()
     input.scss 30:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_explicit: null` at the stylesheet root.
 
@@ -114,7 +114,7 @@ Recommendation: add `$check_explicit: null` at the stylesheet root.
     input.scss 24:3  fn()
     input.scss 30:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_default: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/functional/if.hrx b/spec/libsass/variable-scoping/blead-global/functional/if.hrx
index 8a8d586a2..7a139757e 100644
--- a/spec/libsass/variable-scoping/blead-global/functional/if.hrx
+++ b/spec/libsass/variable-scoping/blead-global/functional/if.hrx
@@ -70,7 +70,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -81,7 +81,7 @@ unnecessary and can safely be removed.
   '
     input.scss 4:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
@@ -92,7 +92,7 @@ Recommendation: add `$local_explicit: null` at the stylesheet root.
     input.scss 12:5  fn()
     input.scss 30:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_implicit: null` at the stylesheet root.
 
@@ -103,7 +103,7 @@ Recommendation: add `$check_implicit: null` at the stylesheet root.
     input.scss 23:3  fn()
     input.scss 30:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_explicit: null` at the stylesheet root.
 
@@ -114,7 +114,7 @@ Recommendation: add `$check_explicit: null` at the stylesheet root.
     input.scss 24:3  fn()
     input.scss 30:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_default: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/blead-global/functional/while.hrx b/spec/libsass/variable-scoping/blead-global/functional/while.hrx
index a4728f1ea..7a9a77e98 100644
--- a/spec/libsass/variable-scoping/blead-global/functional/while.hrx
+++ b/spec/libsass/variable-scoping/blead-global/functional/while.hrx
@@ -76,7 +76,7 @@ result {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -87,7 +87,7 @@ unnecessary and can safely be removed.
   '
     input.scss 6:1  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$local_explicit: null` at the stylesheet root.
 
@@ -98,7 +98,7 @@ Recommendation: add `$local_explicit: null` at the stylesheet root.
     input.scss 14:5  fn()
     input.scss 34:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_implicit: null` at the stylesheet root.
 
@@ -109,7 +109,7 @@ Recommendation: add `$check_implicit: null` at the stylesheet root.
     input.scss 27:3  fn()
     input.scss 34:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_explicit: null` at the stylesheet root.
 
@@ -120,7 +120,7 @@ Recommendation: add `$check_explicit: null` at the stylesheet root.
     input.scss 28:3  fn()
     input.scss 34:7  root stylesheet
 
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$check_default: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/defaults-global-null.hrx b/spec/libsass/variable-scoping/defaults-global-null.hrx
index eab440ce9..469bf5502 100644
--- a/spec/libsass/variable-scoping/defaults-global-null.hrx
+++ b/spec/libsass/variable-scoping/defaults-global-null.hrx
@@ -34,7 +34,7 @@ div inner {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$foo: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/defaults-global.hrx b/spec/libsass/variable-scoping/defaults-global.hrx
index 01e98030b..d2ba2595d 100644
--- a/spec/libsass/variable-scoping/defaults-global.hrx
+++ b/spec/libsass/variable-scoping/defaults-global.hrx
@@ -28,7 +28,7 @@ div inner {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$foo: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/defaults.hrx b/spec/libsass/variable-scoping/defaults.hrx
index 785982cbd..4a45308f0 100644
--- a/spec/libsass/variable-scoping/defaults.hrx
+++ b/spec/libsass/variable-scoping/defaults.hrx
@@ -57,7 +57,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$n: null` at the stylesheet root.
 
diff --git a/spec/libsass/variable-scoping/feature-test.hrx b/spec/libsass/variable-scoping/feature-test.hrx
index ac1374990..d1d20213d 100644
--- a/spec/libsass/variable-scoping/feature-test.hrx
+++ b/spec/libsass/variable-scoping/feature-test.hrx
@@ -11,7 +11,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: The feature-exists() function is deprecated.
+DEPRECATION WARNING [feature-exists]: The feature-exists() function is deprecated.
 
 More info: https://sass-lang.com/d/feature-exists
 
diff --git a/spec/non_conformant/basic/14_imports.hrx b/spec/non_conformant/basic/14_imports.hrx
index eff87c869..5084198c0 100644
--- a/spec/non_conformant/basic/14_imports.hrx
+++ b/spec/non_conformant/basic/14_imports.hrx
@@ -58,7 +58,7 @@ foo blux {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -68,7 +68,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -78,7 +78,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.scss 7:13  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -88,7 +88,7 @@ More info and automated migrator: https://sass-lang.com/d/import
    '
     input.scss 10:11  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/non_conformant/basic/15_arithmetic_and_lists.hrx b/spec/non_conformant/basic/15_arithmetic_and_lists.hrx
index 3462e15d6..6c488b2f8 100644
--- a/spec/non_conformant/basic/15_arithmetic_and_lists.hrx
+++ b/spec/non_conformant/basic/15_arithmetic_and_lists.hrx
@@ -74,7 +74,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4) or calc(3 / 4)
 
@@ -86,7 +86,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 7:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -98,7 +98,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 8:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -110,7 +110,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 8:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(15, 3) or calc(15 / 3)
 
@@ -122,7 +122,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 18:7  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(15, 3), 5) or calc(15 / 3 / 5)
 
@@ -134,7 +134,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 18:7  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(15, 3) or calc(15 / 3)
 
@@ -146,7 +146,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 20:7  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(15 / 3, 5) or calc((15 / 3) / 5)
 
@@ -158,7 +158,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 20:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(15, $three) or calc(15 / $three)
 
@@ -170,7 +170,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 22:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(15, 5), $three) or calc(15 / 5 / $three)
 
@@ -182,7 +182,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 23:6  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(20pt, 10pt) or calc(20pt / 10pt)
 
@@ -194,7 +194,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 28:7  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(5em, 2) or calc(5em / 2)
 
@@ -206,7 +206,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 30:7  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4) or calc(3 / 4)
 
@@ -218,7 +218,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 31:16  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 0) or calc(1 / 0)
 
@@ -230,7 +230,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
    '
     input.scss 35:19  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(0, 0) or calc(0 / 0)
 
diff --git a/spec/non_conformant/basic/22_colors_with_alpha.hrx b/spec/non_conformant/basic/22_colors_with_alpha.hrx
index 4a83ab603..a76315877 100644
--- a/spec/non_conformant/basic/22_colors_with_alpha.hrx
+++ b/spec/non_conformant/basic/22_colors_with_alpha.hrx
@@ -40,7 +40,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
@@ -52,7 +52,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 16:8  root stylesheet
 
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
@@ -64,7 +64,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 17:8  root stylesheet
 
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
diff --git a/spec/non_conformant/basic/27_media_queries.hrx b/spec/non_conformant/basic/27_media_queries.hrx
index 73646c15f..470f58c6a 100644
--- a/spec/non_conformant/basic/27_media_queries.hrx
+++ b/spec/non_conformant/basic/27_media_queries.hrx
@@ -37,7 +37,7 @@ a b c d e f {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
diff --git a/spec/non_conformant/basic/32_percentages.hrx b/spec/non_conformant/basic/32_percentages.hrx
index 78c635be9..ab7216de6 100644
--- a/spec/non_conformant/basic/32_percentages.hrx
+++ b/spec/non_conformant/basic/32_percentages.hrx
@@ -27,7 +27,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(20%, 4%) or calc(20% / 4%)
 
@@ -39,7 +39,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 8:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(35%, 7) or calc(35% / 7)
 
diff --git a/spec/non_conformant/extend-tests/129_test_nested_extender_with_hacky_selector.hrx b/spec/non_conformant/extend-tests/129_test_nested_extender_with_hacky_selector.hrx
index ea7ab2735..3b51c22ba 100644
--- a/spec/non_conformant/extend-tests/129_test_nested_extender_with_hacky_selector.hrx
+++ b/spec/non_conformant/extend-tests/129_test_nested_extender_with_hacky_selector.hrx
@@ -8,7 +8,7 @@ foo + > > + bar {@extend .foo}
 }
 
 <===> warning
-DEPRECATION WARNING: The selector "foo + > > + bar" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "foo + > > + bar" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/130_test_nested_extender_with_hacky_selector.hrx b/spec/non_conformant/extend-tests/130_test_nested_extender_with_hacky_selector.hrx
index ae6946754..678ef5f75 100644
--- a/spec/non_conformant/extend-tests/130_test_nested_extender_with_hacky_selector.hrx
+++ b/spec/non_conformant/extend-tests/130_test_nested_extender_with_hacky_selector.hrx
@@ -8,7 +8,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: The selector "> > bar" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "> > bar" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/133_test_combinator_unification_for_hacky_combinators.hrx b/spec/non_conformant/extend-tests/133_test_combinator_unification_for_hacky_combinators.hrx
index fe2aedd7c..fb4a9e2ae 100644
--- a/spec/non_conformant/extend-tests/133_test_combinator_unification_for_hacky_combinators.hrx
+++ b/spec/non_conformant/extend-tests/133_test_combinator_unification_for_hacky_combinators.hrx
@@ -5,7 +5,7 @@
 <===> output.css
 
 <===> warning
-DEPRECATION WARNING: The selector ".a > + x" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ".a > + x" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/134_test_combinator_unification_for_hacky_combinators.hrx b/spec/non_conformant/extend-tests/134_test_combinator_unification_for_hacky_combinators.hrx
index ea854d3b5..4a0f1c911 100644
--- a/spec/non_conformant/extend-tests/134_test_combinator_unification_for_hacky_combinators.hrx
+++ b/spec/non_conformant/extend-tests/134_test_combinator_unification_for_hacky_combinators.hrx
@@ -8,7 +8,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: The selector ".b > + y" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector ".b > + y" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/135_test_combinator_unification_for_hacky_combinators.hrx b/spec/non_conformant/extend-tests/135_test_combinator_unification_for_hacky_combinators.hrx
index abe479b0c..3ff33780d 100644
--- a/spec/non_conformant/extend-tests/135_test_combinator_unification_for_hacky_combinators.hrx
+++ b/spec/non_conformant/extend-tests/135_test_combinator_unification_for_hacky_combinators.hrx
@@ -5,7 +5,7 @@
 <===> output.css
 
 <===> warning
-DEPRECATION WARNING: The selector ".a > + x" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ".a > + x" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -16,7 +16,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: The selector ".b > + y" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector ".b > + y" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/136_test_combinator_unification_for_hacky_combinators.hrx b/spec/non_conformant/extend-tests/136_test_combinator_unification_for_hacky_combinators.hrx
index cd49b1fae..af707d473 100644
--- a/spec/non_conformant/extend-tests/136_test_combinator_unification_for_hacky_combinators.hrx
+++ b/spec/non_conformant/extend-tests/136_test_combinator_unification_for_hacky_combinators.hrx
@@ -5,7 +5,7 @@
 <===> output.css
 
 <===> warning
-DEPRECATION WARNING: The selector ".a ~ > + x" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ".a ~ > + x" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -16,7 +16,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: The selector ".b > + y" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector ".b > + y" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/137_test_combinator_unification_for_hacky_combinators.hrx b/spec/non_conformant/extend-tests/137_test_combinator_unification_for_hacky_combinators.hrx
index 05b4d9c18..51d3763a2 100644
--- a/spec/non_conformant/extend-tests/137_test_combinator_unification_for_hacky_combinators.hrx
+++ b/spec/non_conformant/extend-tests/137_test_combinator_unification_for_hacky_combinators.hrx
@@ -5,7 +5,7 @@
 <===> output.css
 
 <===> warning
-DEPRECATION WARNING: The selector ".a + > x" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ".a + > x" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -16,7 +16,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: The selector ".b > + y" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector ".b > + y" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/138_test_combinator_unification_for_hacky_combinators.hrx b/spec/non_conformant/extend-tests/138_test_combinator_unification_for_hacky_combinators.hrx
index 05b4d9c18..51d3763a2 100644
--- a/spec/non_conformant/extend-tests/138_test_combinator_unification_for_hacky_combinators.hrx
+++ b/spec/non_conformant/extend-tests/138_test_combinator_unification_for_hacky_combinators.hrx
@@ -5,7 +5,7 @@
 <===> output.css
 
 <===> warning
-DEPRECATION WARNING: The selector ".a + > x" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ".a + > x" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -16,7 +16,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: The selector ".b > + y" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector ".b > + y" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/139_test_combinator_unification_for_hacky_combinators.hrx b/spec/non_conformant/extend-tests/139_test_combinator_unification_for_hacky_combinators.hrx
index 1e17c9170..8d90dc3ef 100644
--- a/spec/non_conformant/extend-tests/139_test_combinator_unification_for_hacky_combinators.hrx
+++ b/spec/non_conformant/extend-tests/139_test_combinator_unification_for_hacky_combinators.hrx
@@ -5,7 +5,7 @@
 <===> output.css
 
 <===> warning
-DEPRECATION WARNING: The selector ".a ~ > + .b > x" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector ".a ~ > + .b > x" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -16,7 +16,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: The selector ".c > + .d > y" is invalid CSS and can't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector ".c > + .d > y" is invalid CSS and can't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/224_test_nested_selector_with_child_selector_hack_extendee.hrx b/spec/non_conformant/extend-tests/224_test_nested_selector_with_child_selector_hack_extendee.hrx
index f4b28fb72..29f8e21b4 100644
--- a/spec/non_conformant/extend-tests/224_test_nested_selector_with_child_selector_hack_extendee.hrx
+++ b/spec/non_conformant/extend-tests/224_test_nested_selector_with_child_selector_hack_extendee.hrx
@@ -8,7 +8,7 @@ foo bar {@extend .foo}
 }
 
 <===> warning
-DEPRECATION WARNING: The selector "> .foo" is invalid CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "> .foo" is invalid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/225_test_nested_selector_with_child_selector_hack_extender.hrx b/spec/non_conformant/extend-tests/225_test_nested_selector_with_child_selector_hack_extender.hrx
index 47c03f9a4..cfc8a1eb3 100644
--- a/spec/non_conformant/extend-tests/225_test_nested_selector_with_child_selector_hack_extender.hrx
+++ b/spec/non_conformant/extend-tests/225_test_nested_selector_with_child_selector_hack_extender.hrx
@@ -8,7 +8,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: The selector "> foo bar" is invalid CSS and shouldn't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "> foo bar" is invalid CSS and shouldn't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/226_test_nested_selector_with_child_selector_hack_extender_and_extendee.hrx b/spec/non_conformant/extend-tests/226_test_nested_selector_with_child_selector_hack_extender_and_extendee.hrx
index 0cf9fcd1a..f109c0c2b 100644
--- a/spec/non_conformant/extend-tests/226_test_nested_selector_with_child_selector_hack_extender_and_extendee.hrx
+++ b/spec/non_conformant/extend-tests/226_test_nested_selector_with_child_selector_hack_extender_and_extendee.hrx
@@ -8,7 +8,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: The selector "> .foo" is invalid CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "> .foo" is invalid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -19,7 +19,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: The selector "> foo bar" is invalid CSS and shouldn't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "> foo bar" is invalid CSS and shouldn't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/227_test_nested_with_child_hack_extender_and_sibling_extendee.hrx b/spec/non_conformant/extend-tests/227_test_nested_with_child_hack_extender_and_sibling_extendee.hrx
index b32766411..4b5643d03 100644
--- a/spec/non_conformant/extend-tests/227_test_nested_with_child_hack_extender_and_sibling_extendee.hrx
+++ b/spec/non_conformant/extend-tests/227_test_nested_with_child_hack_extender_and_sibling_extendee.hrx
@@ -8,7 +8,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: The selector "~ .foo" is invalid CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "~ .foo" is invalid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -19,7 +19,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: The selector "> foo bar" is invalid CSS and shouldn't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "> foo bar" is invalid CSS and shouldn't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/extend-tests/228_test_nested_with_child_selector_hack_extender_extendee_newline.hrx b/spec/non_conformant/extend-tests/228_test_nested_with_child_selector_hack_extender_extendee_newline.hrx
index 51ee120ba..f5f4df39f 100644
--- a/spec/non_conformant/extend-tests/228_test_nested_with_child_selector_hack_extender_extendee_newline.hrx
+++ b/spec/non_conformant/extend-tests/228_test_nested_with_child_selector_hack_extender_extendee_newline.hrx
@@ -10,7 +10,7 @@ flip,
 }
 
 <===> warning
-DEPRECATION WARNING: The selector "> .foo" is invalid CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "> .foo" is invalid CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -21,7 +21,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: The selector "> foo bar" is invalid CSS and shouldn't be an extender.
+DEPRECATION WARNING [bogus-combinators]: The selector "> foo bar" is invalid CSS and shouldn't be an extender.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/operations/division.hrx b/spec/non_conformant/operations/division.hrx
index 704343b74..933b5378b 100644
--- a/spec/non_conformant/operations/division.hrx
+++ b/spec/non_conformant/operations/division.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> slash/with_string/slash_plus_string/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -30,7 +30,7 @@ a {
 }
 
 <===> slash/with_string/slash_minus_string/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -63,7 +63,7 @@ a {
 }
 
 <===> slash/with_string/string_plus_slash/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -86,7 +86,7 @@ a {
 }
 
 <===> slash/with_string/string_minus_slash/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
diff --git a/spec/non_conformant/parser/operations/addition/dimensions/pairs.hrx b/spec/non_conformant/parser/operations/addition/dimensions/pairs.hrx
index d5d19f39b..e853f8bd5 100644
--- a/spec/non_conformant/parser/operations/addition/dimensions/pairs.hrx
+++ b/spec/non_conformant/parser/operations/addition/dimensions/pairs.hrx
@@ -175,7 +175,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10 + 10
 
@@ -195,7 +195,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
   '
     input.scss 3:11  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10 + 10px
 
@@ -215,7 +215,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
   '
     input.scss 7:11  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10 + #{10}px
 
@@ -235,7 +235,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 11:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10 + 1
 
@@ -255,7 +255,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 15:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10 + 10
 
@@ -275,7 +275,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 19:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10 + 10
 
@@ -295,7 +295,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 23:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10px + 10px
 
@@ -315,7 +315,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 27:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10px + #{10}px
 
@@ -335,7 +335,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 31:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10px + 1
 
@@ -355,7 +355,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 35:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10px + 10
 
@@ -375,7 +375,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 39:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10px + 10
 
@@ -395,7 +395,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 43:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{10}px + #{10}px
 
@@ -415,7 +415,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 47:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{10}px + 1
 
@@ -435,7 +435,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 51:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{10}px + 10
 
@@ -455,7 +455,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 55:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{10}px + 10
 
@@ -475,7 +475,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 59:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{0}px + 1
 
@@ -495,7 +495,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 63:13  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{0}px + 10
 
@@ -515,7 +515,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 67:13  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{0}px + 10
 
@@ -535,7 +535,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 71:13  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{px} + 10
 
@@ -555,7 +555,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 75:14  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{px} + 10
 
@@ -575,7 +575,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 79:14  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{p}x + 10
 
diff --git a/spec/non_conformant/parser/operations/addition/numbers/pairs.hrx b/spec/non_conformant/parser/operations/addition/numbers/pairs.hrx
index 2c47ca3b9..d11491fc6 100644
--- a/spec/non_conformant/parser/operations/addition/numbers/pairs.hrx
+++ b/spec/non_conformant/parser/operations/addition/numbers/pairs.hrx
@@ -87,7 +87,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10 + 10
 
@@ -107,7 +107,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
   '
     input.scss 3:11  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10 + #{10}
 
@@ -127,7 +127,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
   '
     input.scss 7:11  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10 + 1
 
@@ -147,7 +147,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 11:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     10 + #{1}0
 
@@ -167,7 +167,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 15:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{10} + #{10}
 
@@ -187,7 +187,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 19:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{10} + 1
 
@@ -207,7 +207,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 23:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{10} + #{1}0
 
@@ -227,7 +227,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 27:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{0} + 1
 
@@ -247,7 +247,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 31:13  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{0} + #{1}0
 
@@ -267,7 +267,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 35:13  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{1}0 + #{1}0
 
diff --git a/spec/non_conformant/parser/operations/addition/strings/pairs.hrx b/spec/non_conformant/parser/operations/addition/strings/pairs.hrx
index da0a3da71..077d36ea3 100644
--- a/spec/non_conformant/parser/operations/addition/strings/pairs.hrx
+++ b/spec/non_conformant/parser/operations/addition/strings/pairs.hrx
@@ -127,7 +127,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     literal + literal
 
@@ -147,7 +147,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
   '
     input.scss 3:11  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     literal + "quoted"
 
@@ -167,7 +167,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
   '
     input.scss 7:11  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     literal + #{interpolant}
 
@@ -187,7 +187,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 11:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     literal + lschema_#{ritlp}
 
@@ -207,7 +207,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 15:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     literal + #{litlp}_rschema
 
@@ -227,7 +227,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 19:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     "quoted" + "quoted"
 
@@ -247,7 +247,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 23:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     "quoted" + #{interpolant}
 
@@ -267,7 +267,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 27:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     "quoted" + lschema_#{ritlp}
 
@@ -287,7 +287,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 31:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     "quoted" + #{litlp}_rschema
 
@@ -307,7 +307,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 35:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{interpolant} + #{interpolant}
 
@@ -327,7 +327,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 39:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{interpolant} + lschema_#{ritlp}
 
@@ -347,7 +347,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 43:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{interpolant} + #{litlp}_rschema
 
@@ -367,7 +367,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 47:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     lschema_#{ritlp} + lschema_#{ritlp}
 
@@ -387,7 +387,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 51:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     lschema_#{ritlp} + #{litlp}_rschema
 
@@ -407,7 +407,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 55:12  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{litlp}_rschema + #{litlp}_rschema
 
diff --git a/spec/non_conformant/parser/operations/subtract/strings/pairs.hrx b/spec/non_conformant/parser/operations/subtract/strings/pairs.hrx
index d2acc7ae4..86f91a819 100644
--- a/spec/non_conformant/parser/operations/subtract/strings/pairs.hrx
+++ b/spec/non_conformant/parser/operations/subtract/strings/pairs.hrx
@@ -127,7 +127,7 @@ foo {
 }
 
 <===> warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     literal - "quoted"
 
@@ -147,7 +147,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
   '
     input.scss 7:11  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     "quoted" - "quoted"
 
diff --git a/spec/non_conformant/sass/import/unquoted.hrx b/spec/non_conformant/sass/import/unquoted.hrx
index 404d68a23..1cd64b8ba 100644
--- a/spec/non_conformant/sass/import/unquoted.hrx
+++ b/spec/non_conformant/sass/import/unquoted.hrx
@@ -17,7 +17,7 @@ d {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
@@ -27,7 +27,7 @@ More info and automated migrator: https://sass-lang.com/d/import
   '
     input.sass 1:9  root stylesheet
 
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/non_conformant/sass/imported.hrx b/spec/non_conformant/sass/imported.hrx
index 84cba718c..5841be7dd 100644
--- a/spec/non_conformant/sass/imported.hrx
+++ b/spec/non_conformant/sass/imported.hrx
@@ -16,7 +16,7 @@ div li {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [import]: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.
 
 More info and automated migrator: https://sass-lang.com/d/import
 
diff --git a/spec/non_conformant/sass/selectors.hrx b/spec/non_conformant/sass/selectors.hrx
index c26b14944..47be03b63 100644
--- a/spec/non_conformant/sass/selectors.hrx
+++ b/spec/non_conformant/sass/selectors.hrx
@@ -54,7 +54,7 @@ commas indented {
 }
 
 <===> warning
-DEPRECATION WARNING: The selector ".test ~" is only valid for nesting and shouldn't
+DEPRECATION WARNING [bogus-combinators]: The selector ".test ~" is only valid for nesting and shouldn't
 have children other than style rules. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
@@ -68,7 +68,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.sass 3:3  root stylesheet
 
-DEPRECATION WARNING: The selector ".test +" is only valid for nesting and shouldn't
+DEPRECATION WARNING [bogus-combinators]: The selector ".test +" is only valid for nesting and shouldn't
 have children other than style rules. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
@@ -82,7 +82,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.sass 5:3  root stylesheet
 
-DEPRECATION WARNING: The selector ".test >" is only valid for nesting and shouldn't
+DEPRECATION WARNING [bogus-combinators]: The selector ".test >" is only valid for nesting and shouldn't
 have children other than style rules. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
diff --git a/spec/non_conformant/scss/alpha.hrx b/spec/non_conformant/scss/alpha.hrx
index 9123f8310..8766adfc3 100644
--- a/spec/non_conformant/scss/alpha.hrx
+++ b/spec/non_conformant/scss/alpha.hrx
@@ -38,7 +38,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
@@ -50,7 +50,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 17:8  root stylesheet
 
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
@@ -62,7 +62,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 18:8  root stylesheet
 
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
diff --git a/spec/non_conformant/scss/css_selector_hacks.hrx b/spec/non_conformant/scss/css_selector_hacks.hrx
index 891816adb..130227ef4 100644
--- a/spec/non_conformant/scss/css_selector_hacks.hrx
+++ b/spec/non_conformant/scss/css_selector_hacks.hrx
@@ -5,7 +5,7 @@
 <===> output.css
 
 <===> warning
-DEPRECATION WARNING: The selector "> > E" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "> > E" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/scss/function-names.hrx b/spec/non_conformant/scss/function-names.hrx
index a6fba6e07..8b3c636e6 100644
--- a/spec/non_conformant/scss/function-names.hrx
+++ b/spec/non_conformant/scss/function-names.hrx
@@ -13,7 +13,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use string.unquote instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/non_conformant/scss/functions-and-mixins.hrx b/spec/non_conformant/scss/functions-and-mixins.hrx
index fa24b5e20..9bde510d8 100644
--- a/spec/non_conformant/scss/functions-and-mixins.hrx
+++ b/spec/non_conformant/scss/functions-and-mixins.hrx
@@ -34,7 +34,7 @@ div span div {
 }
 
 <===> warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use list.length instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/non_conformant/scss/interpolation-operators-precedence.hrx b/spec/non_conformant/scss/interpolation-operators-precedence.hrx
index cfe8de673..79aa5da15 100644
--- a/spec/non_conformant/scss/interpolation-operators-precedence.hrx
+++ b/spec/non_conformant/scss/interpolation-operators-precedence.hrx
@@ -49,7 +49,7 @@
 }
 
 <===> error
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{a} + 5%
 
@@ -69,7 +69,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
   '
     input.scss 4:9  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     5 + 2% + #{a}
 
@@ -89,7 +89,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
   '
     input.scss 8:9  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{a} + 5%
 
@@ -109,7 +109,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 10:9  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{a} + 5%
 
@@ -129,7 +129,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 14:9  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{a} + 5% / 2
 
@@ -149,7 +149,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 18:9  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     #{a} + 5% * 2
 
@@ -169,7 +169,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 22:9  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     5 + 2% + #{a}
 
@@ -189,7 +189,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 26:9  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     5 - 2% + #{a}
 
@@ -209,7 +209,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 30:9  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     5% / 2 + #{a}
 
@@ -229,7 +229,7 @@ More info and automated migrator: https://sass-lang.com/d/strict-unary
    '
     input.scss 34:9  root stylesheet
 
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     5 * 2% + #{a}
 
diff --git a/spec/non_conformant/scss/mixin-content.hrx b/spec/non_conformant/scss/mixin-content.hrx
index 525f16b81..3d795a4ba 100644
--- a/spec/non_conformant/scss/mixin-content.hrx
+++ b/spec/non_conformant/scss/mixin-content.hrx
@@ -118,7 +118,7 @@ span div form {
 }
 
 <===> warning
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
@@ -143,7 +143,7 @@ More info: https://sass-lang.com/d/mixed-decls
     input.scss 29:5  foo()
     input.scss 47:3  root stylesheet
 
-DEPRECATION WARNING: Sass's behavior for declarations that appear after nested
+DEPRECATION WARNING [mixed-decls]: Sass's behavior for declarations that appear after nested
 rules will be changing to match the behavior specified by CSS in an upcoming
 version. To keep the existing behavior, move the declaration above the nested
 rule. To opt into the new behavior, wrap the declaration in `& {}`.
diff --git a/spec/non_conformant/scss/negation.hrx b/spec/non_conformant/scss/negation.hrx
index 8e750e19a..4972840f6 100644
--- a/spec/non_conformant/scss/negation.hrx
+++ b/spec/non_conformant/scss/negation.hrx
@@ -15,7 +15,7 @@
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(-$bwidth, 3) or calc(-1 * $bwidth / 3)
 
@@ -27,7 +27,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:9  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 3) or calc(1 / 3)
 
@@ -39,7 +39,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:11  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(10000, 3) or calc(10000 / 3)
 
@@ -51,7 +51,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 5:12  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(20, 8) or calc(20 / 8)
 
diff --git a/spec/non_conformant/scss/percentages.hrx b/spec/non_conformant/scss/percentages.hrx
index 78c635be9..ab7216de6 100644
--- a/spec/non_conformant/scss/percentages.hrx
+++ b/spec/non_conformant/scss/percentages.hrx
@@ -27,7 +27,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(20%, 4%) or calc(20% / 4%)
 
@@ -39,7 +39,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 8:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(35%, 7) or calc(35% / 7)
 
diff --git a/spec/non_conformant/scss/precision.hrx b/spec/non_conformant/scss/precision.hrx
index f1c08c42a..d06df7699 100644
--- a/spec/non_conformant/scss/precision.hrx
+++ b/spec/non_conformant/scss/precision.hrx
@@ -18,7 +18,7 @@ div {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(20, 3) or calc(20 / 3)
 
@@ -30,7 +30,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:7  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(5, 2) or calc(5 / 2)
 
@@ -42,7 +42,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:7  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(9, 3) or calc(9 / 3)
 
@@ -54,7 +54,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:7  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(20, -3) or calc(20 / -3)
 
@@ -66,7 +66,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 5:7  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(-5, 2) or calc(-5 / 2)
 
@@ -78,7 +78,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 6:7  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(9, 3) or calc(9 / 3)
 
diff --git a/spec/non_conformant/scss/weird-selectors.hrx b/spec/non_conformant/scss/weird-selectors.hrx
index a0ffe4a9e..89b4ff256 100644
--- a/spec/non_conformant/scss/weird-selectors.hrx
+++ b/spec/non_conformant/scss/weird-selectors.hrx
@@ -15,7 +15,7 @@ E > > {
 <===> output.css
 
 <===> warning
-DEPRECATION WARNING: The selector "> > E" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "> > E" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -26,7 +26,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 1:1  root stylesheet
 
-DEPRECATION WARNING: The selector "E > >" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "E > >" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
@@ -37,7 +37,7 @@ More info: https://sass-lang.com/d/bogus-combinators
   '
     input.scss 5:1  root stylesheet
 
-DEPRECATION WARNING: The selector "> > E > > > > F > >" is invalid CSS. It will be omitted from the generated CSS.
+DEPRECATION WARNING [bogus-combinators]: The selector "> > E > > > > F > >" is invalid CSS. It will be omitted from the generated CSS.
 This will be an error in Dart Sass 2.0.0.
 
 More info: https://sass-lang.com/d/bogus-combinators
diff --git a/spec/non_conformant/variables.hrx b/spec/non_conformant/variables.hrx
index f5931d4e0..9464387c4 100644
--- a/spec/non_conformant/variables.hrx
+++ b/spec/non_conformant/variables.hrx
@@ -8,7 +8,7 @@ a {
 }
 
 <===> global/first_declaration/top_level/warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Since this assignment is at the root of the stylesheet, the !global flag is
 unnecessary and can safely be removed.
@@ -31,7 +31,7 @@ a {
 }
 
 <===> global/first_declaration/nested/warning
-DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
+DEPRECATION WARNING [new-global]: As of Dart Sass 2.0.0, !global assignments won't be able to declare new variables.
 
 Recommendation: add `$var: null` at the stylesheet root.
 
diff --git a/spec/operators/minus.hrx b/spec/operators/minus.hrx
index 214e1f891..c3dc8cd90 100644
--- a/spec/operators/minus.hrx
+++ b/spec/operators/minus.hrx
@@ -27,7 +27,7 @@ a {
 }
 
 <===> syntax/whitespace/left/space/warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     c - (d)
 
@@ -58,7 +58,7 @@ a {
 }
 
 <===> syntax/whitespace/left/tab/warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     c - (d)
 
@@ -90,7 +90,7 @@ a {
 }
 
 <===> syntax/whitespace/left/newline/warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     c - (d)
 
diff --git a/spec/operators/plus.hrx b/spec/operators/plus.hrx
index 6625e378e..bfad573c2 100644
--- a/spec/operators/plus.hrx
+++ b/spec/operators/plus.hrx
@@ -27,7 +27,7 @@ a {
 }
 
 <===> syntax/whitespace/left/space/warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     c + d
 
@@ -58,7 +58,7 @@ a {
 }
 
 <===> syntax/whitespace/left/tab/warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     c + d
 
@@ -90,7 +90,7 @@ a {
 }
 
 <===> syntax/whitespace/left/newline/warning
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     c + d
 
diff --git a/spec/operators/slash.hrx b/spec/operators/slash.hrx
index 715972b81..5c2de3c84 100644
--- a/spec/operators/slash.hrx
+++ b/spec/operators/slash.hrx
@@ -12,7 +12,7 @@ a {
 }
 
 <===> namespaced_variables/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(other.$a, other.$b) or calc(other.$a / other.$b)
 
diff --git a/spec/values/calculation/abs.hrx b/spec/values/calculation/abs.hrx
index f875034d9..dc56e187d 100644
--- a/spec/values/calculation/abs.hrx
+++ b/spec/values/calculation/abs.hrx
@@ -65,7 +65,7 @@ a {
 }
 
 <===> preserves_single_unit/warning
-DEPRECATION WARNING: In future versions of Sass, abs() will be interpreted as the CSS abs() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.abs() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, abs() will be interpreted as the CSS abs() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.abs() instead.
 
 See https://sass-lang.com/d/import
 
@@ -86,7 +86,7 @@ a {
 }
 
 <===> sass_script/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.abs instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -108,11 +108,12 @@ a {
 }
 
 <===> percentage_warning/warning
-DEPRECATION WARNING: Passing percentage units to the global abs() function is deprecated.
+DEPRECATION WARNING [abs-percent]: Passing percentage units to the global abs() function is deprecated.
 In the future, this will emit a CSS abs() function to be resolved by the browser.
 To preserve current behavior: math.abs(-7.5%)
 To emit a CSS abs() now: abs(#{-7.5%})
 More info: https://sass-lang.com/d/abs-percent
+
   ,
 1 | a {b: abs(-7.5%)}
   |       ^^^^^^^^^^
@@ -132,7 +133,7 @@ b {
 }
 
 <===> math/slash_as_division/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(2px, abs(1.5)) or calc(2px / abs(1.5))
 
diff --git a/spec/values/calculation/calc/error/syntax.hrx b/spec/values/calculation/calc/error/syntax.hrx
index dca1727db..00da69d6a 100644
--- a/spec/values/calculation/calc/error/syntax.hrx
+++ b/spec/values/calculation/calc/error/syntax.hrx
@@ -147,7 +147,7 @@ Error: "+" and "-" must be surrounded by whitespace in calculations.
 a {b: calc(1 +1)}
 
 <===> no_whitespace/plus/after/error
-DEPRECATION WARNING: This operation is parsed as:
+DEPRECATION WARNING [strict-unary]: This operation is parsed as:
 
     1 + 1
 
diff --git a/spec/values/calculation/calc/no_operator.hrx b/spec/values/calculation/calc/no_operator.hrx
index 31bbbb813..4de3446ef 100644
--- a/spec/values/calculation/calc/no_operator.hrx
+++ b/spec/values/calculation/calc/no_operator.hrx
@@ -256,7 +256,7 @@ b {
 }
 
 <===> function/min/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.min instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -278,7 +278,7 @@ b {
 }
 
 <===> function/max/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.max instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/values/calculation/max.hrx b/spec/values/calculation/max.hrx
index 40bb421e7..c85c81076 100644
--- a/spec/values/calculation/max.hrx
+++ b/spec/values/calculation/max.hrx
@@ -212,7 +212,7 @@ a {
 }
 
 <===> simplified/operation/unitless_and_real/warning
-DEPRECATION WARNING: In future versions of Sass, max() will be interpreted as the CSS max() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.max() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, max() will be interpreted as the CSS max() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.max() instead.
 
 See https://sass-lang.com/d/import
 
@@ -304,7 +304,7 @@ a {
 }
 
 <===> preserved/operation/unitless_and_real/plus/warning
-DEPRECATION WARNING: In future versions of Sass, max() will be interpreted as the CSS max() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.max() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, max() will be interpreted as the CSS max() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.max() instead.
 
 See https://sass-lang.com/d/import
 
@@ -325,7 +325,7 @@ a {
 }
 
 <===> preserved/operation/unitless_and_real/minus/warning
-DEPRECATION WARNING: In future versions of Sass, max() will be interpreted as the CSS max() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.max() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, max() will be interpreted as the CSS max() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.max() instead.
 
 See https://sass-lang.com/d/import
 
@@ -346,7 +346,7 @@ a {
 }
 
 <===> preserved/operation/unitless_and_real/in_calc/warning
-DEPRECATION WARNING: In future versions of Sass, max() will be interpreted as the CSS max() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.max() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, max() will be interpreted as the CSS max() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.max() instead.
 
 See https://sass-lang.com/d/import
 
@@ -369,9 +369,12 @@ b {
 }
 
 <===> math/slash_as_division/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+
 Recommendation: math.div(2px, max(1.5)) or calc(2px / max(1.5))
+
 More info and automated migrator: https://sass-lang.com/d/slash-div
+
   ,
 2 |   a: 2px / max(1.5);
   |      ^^^^^^^^^^^^^^
diff --git a/spec/values/calculation/min.hrx b/spec/values/calculation/min.hrx
index 0f28f7b8f..655bbf83e 100644
--- a/spec/values/calculation/min.hrx
+++ b/spec/values/calculation/min.hrx
@@ -212,7 +212,7 @@ a {
 }
 
 <===> simplified/operation/unitless_and_real/warning
-DEPRECATION WARNING: In future versions of Sass, min() will be interpreted as the CSS min() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.min() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, min() will be interpreted as the CSS min() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.min() instead.
 
 See https://sass-lang.com/d/import
 
@@ -304,7 +304,7 @@ a {
 }
 
 <===> preserved/operation/unitless_and_real/plus/warning
-DEPRECATION WARNING: In future versions of Sass, min() will be interpreted as the CSS min() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.min() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, min() will be interpreted as the CSS min() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.min() instead.
 
 See https://sass-lang.com/d/import
 
@@ -325,7 +325,7 @@ a {
 }
 
 <===> preserved/operation/unitless_and_real/minus/warning
-DEPRECATION WARNING: In future versions of Sass, min() will be interpreted as the CSS min() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.min() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, min() will be interpreted as the CSS min() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.min() instead.
 
 See https://sass-lang.com/d/import
 
@@ -346,7 +346,7 @@ a {
 }
 
 <===> preserved/operation/unitless_and_real/in_calc/warning
-DEPRECATION WARNING: In future versions of Sass, min() will be interpreted as the CSS min() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.min() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, min() will be interpreted as the CSS min() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.min() instead.
 
 See https://sass-lang.com/d/import
 
@@ -369,9 +369,12 @@ b {
 }
 
 <===> math/slash_as_division/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+
 Recommendation: math.div(2px, min(1.5)) or calc(2px / min(1.5))
+
 More info and automated migrator: https://sass-lang.com/d/slash-div
+
   ,
 2 |   a: 2px / min(1.5);
   |      ^^^^^^^^^^^^^^
diff --git a/spec/values/calculation/round/error.hrx b/spec/values/calculation/round/error.hrx
index 9250cb28e..7a9c97b75 100644
--- a/spec/values/calculation/round/error.hrx
+++ b/spec/values/calculation/round/error.hrx
@@ -34,7 +34,7 @@ Error: Only 3 arguments allowed, but 4 were passed.
 a {b: round($number: var(--c))}
 
 <===> one_argument/sass_script/variable_named_argument/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.round instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -58,7 +58,7 @@ Error: $number: var(--c) is not a number.
 a {b: round("0")}
 
 <===> one_argument/type/error
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.round instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
diff --git a/spec/values/calculation/round/one_argument.hrx b/spec/values/calculation/round/one_argument.hrx
index c24cb22b9..4d41fe726 100644
--- a/spec/values/calculation/round/one_argument.hrx
+++ b/spec/values/calculation/round/one_argument.hrx
@@ -43,7 +43,7 @@ a {
 }
 
 <===> preserves_units/warning
-DEPRECATION WARNING: In future versions of Sass, round() will be interpreted as a CSS round() calculation. This requires an explicit modulus when rounding numbers with units. If you want to use the Sass function, call math.round() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, round() will be interpreted as a CSS round() calculation. This requires an explicit modulus when rounding numbers with units. If you want to use the Sass function, call math.round() instead.
 
 See https://sass-lang.com/d/import
 
@@ -64,7 +64,7 @@ a {
 }
 
 <===> preserves_single_unit/warning
-DEPRECATION WARNING: In future versions of Sass, round() will be interpreted as the CSS round() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.round() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, round() will be interpreted as the CSS round() calculation. This doesn't allow unitless numbers to be mixed with numbers with units. If you want to use the Sass function, call math.round() instead.
 
 See https://sass-lang.com/d/import
 
@@ -74,7 +74,7 @@ See https://sass-lang.com/d/import
   '
     input.scss 1:13  root stylesheet
 
-DEPRECATION WARNING: In future versions of Sass, round() will be interpreted as a CSS round() calculation. This requires an explicit modulus when rounding numbers with units. If you want to use the Sass function, call math.round() instead.
+DEPRECATION WARNING [global-builtin]: In future versions of Sass, round() will be interpreted as a CSS round() calculation. This requires an explicit modulus when rounding numbers with units. If you want to use the Sass function, call math.round() instead.
 
 See https://sass-lang.com/d/import
 
@@ -107,7 +107,7 @@ a {
 }
 
 <===> sass_script/warning
-DEPRECATION WARNING: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
+DEPRECATION WARNING [global-builtin]: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
 Use math.round instead.
 
 More info and automated migrator: https://sass-lang.com/d/import
@@ -131,9 +131,12 @@ b {
 }
 
 <===> math/slash_as_division/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+
 Recommendation: math.div(2px, round(1.5)) or calc(2px / round(1.5))
+
 More info and automated migrator: https://sass-lang.com/d/slash-div
+
   ,
 2 |   a: 2px / round(1.5);
   |      ^^^^^^^^^^^^^^^^
diff --git a/spec/values/colors/alpha_hex/initial_digit.hrx b/spec/values/colors/alpha_hex/initial_digit.hrx
index bff40ade9..73a81f49e 100644
--- a/spec/values/colors/alpha_hex/initial_digit.hrx
+++ b/spec/values/colors/alpha_hex/initial_digit.hrx
@@ -31,7 +31,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
@@ -43,7 +43,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 7:19  root stylesheet
 
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
@@ -55,7 +55,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 8:21  root stylesheet
 
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
@@ -67,7 +67,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 9:20  root stylesheet
 
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
@@ -79,7 +79,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 12:20  root stylesheet
 
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
@@ -91,7 +91,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 13:22  root stylesheet
 
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
diff --git a/spec/values/colors/alpha_hex/initial_letter.hrx b/spec/values/colors/alpha_hex/initial_letter.hrx
index e05d9a372..db48ea92d 100644
--- a/spec/values/colors/alpha_hex/initial_letter.hrx
+++ b/spec/values/colors/alpha_hex/initial_letter.hrx
@@ -31,7 +31,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
@@ -43,7 +43,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 7:19  root stylesheet
 
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
@@ -55,7 +55,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 8:21  root stylesheet
 
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
@@ -67,7 +67,7 @@ More info: https://sass-lang.com/d/color-functions
   '
     input.scss 9:20  root stylesheet
 
-DEPRECATION WARNING: color.red() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.red() is deprecated. Suggestion:
 
 color.channel($color, "red", $space: rgb)
 
@@ -79,7 +79,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 12:20  root stylesheet
 
-DEPRECATION WARNING: color.green() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.green() is deprecated. Suggestion:
 
 color.channel($color, "green", $space: rgb)
 
@@ -91,7 +91,7 @@ More info: https://sass-lang.com/d/color-functions
    '
     input.scss 13:22  root stylesheet
 
-DEPRECATION WARNING: color.blue() is deprecated. Suggestion:
+DEPRECATION WARNING [color-functions]: color.blue() is deprecated. Suggestion:
 
 color.channel($color, "blue", $space: rgb)
 
diff --git a/spec/values/numbers/divide/slash_free/argument.hrx b/spec/values/numbers/divide/slash_free/argument.hrx
index b708e44ed..d75a9412c 100644
--- a/spec/values/numbers/divide/slash_free/argument.hrx
+++ b/spec/values/numbers/divide/slash_free/argument.hrx
@@ -9,7 +9,7 @@ c {
 }
 
 <===> function/user_defined/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -33,7 +33,7 @@ c {
 }
 
 <===> function/built_in/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -45,7 +45,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:17  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -69,7 +69,7 @@ c {
 }
 
 <===> function/named/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -81,7 +81,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:25  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -105,7 +105,7 @@ c {
 }
 
 <===> function/rest/single/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -117,7 +117,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:17  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -141,7 +141,7 @@ c {
 }
 
 <===> function/rest/list/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -153,7 +153,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:17  root stylesheet
 
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4)
 
@@ -177,7 +177,7 @@ c {
 }
 
 <===> function/rest/map/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -189,7 +189,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:27  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4) or calc(3 / 4)
 
@@ -213,7 +213,7 @@ c {
 }
 
 <===> function/rest/kwargs/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -225,7 +225,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:17  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(3, 4) or calc(3 / 4)
 
@@ -248,7 +248,7 @@ c {
 }
 
 <===> macro/positional/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -271,7 +271,7 @@ c {
 }
 
 <===> macro/named/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -294,7 +294,7 @@ c {
 }
 
 <===> macro/rest/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -319,7 +319,7 @@ c {
 }
 
 <===> mixin/user_defined/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -344,7 +344,7 @@ c {
 }
 
 <===> mixin/default/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
diff --git a/spec/values/numbers/divide/slash_free/return.hrx b/spec/values/numbers/divide/slash_free/return.hrx
index 3d9d3ee1c..026c83f5c 100644
--- a/spec/values/numbers/divide/slash_free/return.hrx
+++ b/spec/values/numbers/divide/slash_free/return.hrx
@@ -9,7 +9,7 @@ b {
 }
 
 <===> user_defined/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -34,7 +34,7 @@ a {
 }
 
 <===> built_in/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
diff --git a/spec/values/numbers/divide/slash_free/value.hrx b/spec/values/numbers/divide/slash_free/value.hrx
index bc2cc4e27..5281e2edf 100644
--- a/spec/values/numbers/divide/slash_free/value.hrx
+++ b/spec/values/numbers/divide/slash_free/value.hrx
@@ -7,7 +7,7 @@ a {
 }
 
 <===> parentheses/all/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -30,7 +30,7 @@ a {
 }
 
 <===> parentheses/left/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc((1) / 2)
 
@@ -53,7 +53,7 @@ a {
 }
 
 <===> parentheses/right/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / (2))
 
@@ -76,7 +76,7 @@ a {
 }
 
 <===> outer_math/left/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -99,7 +99,7 @@ a {
 }
 
 <===> outer_math/right/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
@@ -122,7 +122,7 @@ a {
 }
 
 <===> inner_math/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1 * 1, 2) or calc(1 * 1 / 2)
 
@@ -145,7 +145,7 @@ a {
 }
 
 <===> parentheses_in_list/warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2) or calc(1 / 2)
 
diff --git a/spec/values/numbers/divide/slash_free/variable.hrx b/spec/values/numbers/divide/slash_free/variable.hrx
index ae41a457a..a2d1d8162 100644
--- a/spec/values/numbers/divide/slash_free/variable.hrx
+++ b/spec/values/numbers/divide/slash_free/variable.hrx
@@ -8,7 +8,7 @@ b {
 }
 
 <===> local/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -35,7 +35,7 @@ b {
 }
 
 <===> use_with/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
@@ -65,7 +65,7 @@ b {
 }
 
 <===> forward_with/warning
-DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 2)
 
diff --git a/spec/values/numbers/units/multiple/divide_by_multiple_denominators.hrx b/spec/values/numbers/units/multiple/divide_by_multiple_denominators.hrx
index 64e9092ae..1f9388665 100644
--- a/spec/values/numbers/units/multiple/divide_by_multiple_denominators.hrx
+++ b/spec/values/numbers/units/multiple/divide_by_multiple_denominators.hrx
@@ -10,7 +10,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1px) or calc(1 / 1px)
 
@@ -22,7 +22,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:24  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1, 1px), 1rad) or calc(1 / 1px / 1rad)
 
@@ -34,7 +34,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:24  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1 / 1px / 1rad) or calc(1 / (1 / 1px / 1rad))
 
diff --git a/spec/values/numbers/units/multiple/divide_by_multiple_numerators.hrx b/spec/values/numbers/units/multiple/divide_by_multiple_numerators.hrx
index 56889cffa..98814f436 100644
--- a/spec/values/numbers/units/multiple/divide_by_multiple_numerators.hrx
+++ b/spec/values/numbers/units/multiple/divide_by_multiple_numerators.hrx
@@ -10,7 +10,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1px * 1rad) or calc(1 / (1px * 1rad))
 
diff --git a/spec/values/numbers/units/multiple/division_cancels_both.hrx b/spec/values/numbers/units/multiple/division_cancels_both.hrx
index 56c4394dc..5a202408a 100644
--- a/spec/values/numbers/units/multiple/division_cancels_both.hrx
+++ b/spec/values/numbers/units/multiple/division_cancels_both.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px, 1ms) or calc(1px / 1ms)
 
@@ -47,7 +47,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:30  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($number, 1px / 1ms) or calc($number / (1px / 1ms))
 
diff --git a/spec/values/numbers/units/multiple/division_cancels_compatible.hrx b/spec/values/numbers/units/multiple/division_cancels_compatible.hrx
index bd125d55d..d7c84fa93 100644
--- a/spec/values/numbers/units/multiple/division_cancels_compatible.hrx
+++ b/spec/values/numbers/units/multiple/division_cancels_compatible.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($number, 1in) or calc($number / 1in)
 
diff --git a/spec/values/numbers/units/multiple/division_cancels_denominator.hrx b/spec/values/numbers/units/multiple/division_cancels_denominator.hrx
index 131ca9e7f..c78e1c0d0 100644
--- a/spec/values/numbers/units/multiple/division_cancels_denominator.hrx
+++ b/spec/values/numbers/units/multiple/division_cancels_denominator.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1ms) or calc(1 / 1ms)
 
@@ -47,7 +47,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:30  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($number, 1 / 1ms) or calc($number / (1 / 1ms))
 
diff --git a/spec/values/numbers/units/multiple/division_cancels_denominator_twice.hrx b/spec/values/numbers/units/multiple/division_cancels_denominator_twice.hrx
index 9d530d07a..a5a11245a 100644
--- a/spec/values/numbers/units/multiple/division_cancels_denominator_twice.hrx
+++ b/spec/values/numbers/units/multiple/division_cancels_denominator_twice.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1ms) or calc(1 / 1ms)
 
@@ -47,7 +47,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:30  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1, 1ms), 1Hz) or calc(1 / 1ms / 1Hz)
 
@@ -59,7 +59,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:30  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($number, 1 / 1ms / 1Hz) or calc($number / (1 / 1ms / 1Hz))
 
diff --git a/spec/values/numbers/units/multiple/division_cancels_numerator.hrx b/spec/values/numbers/units/multiple/division_cancels_numerator.hrx
index 6188796dd..91ffd5ea8 100644
--- a/spec/values/numbers/units/multiple/division_cancels_numerator.hrx
+++ b/spec/values/numbers/units/multiple/division_cancels_numerator.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($number, 1px) or calc($number / 1px)
 
diff --git a/spec/values/numbers/units/multiple/division_cancels_numerator_twice.hrx b/spec/values/numbers/units/multiple/division_cancels_numerator_twice.hrx
index 5629bc220..9a1cf3978 100644
--- a/spec/values/numbers/units/multiple/division_cancels_numerator_twice.hrx
+++ b/spec/values/numbers/units/multiple/division_cancels_numerator_twice.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($number, 1px * 1rad) or calc($number / (1px * 1rad))
 
diff --git a/spec/values/numbers/units/multiple/division_cancels_unknown.hrx b/spec/values/numbers/units/multiple/division_cancels_unknown.hrx
index c61ac5378..f38c41c53 100644
--- a/spec/values/numbers/units/multiple/division_cancels_unknown.hrx
+++ b/spec/values/numbers/units/multiple/division_cancels_unknown.hrx
@@ -12,7 +12,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1foo * 1bar, 1baz) or calc(1foo * 1bar / 1baz)
 
@@ -24,7 +24,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1foo * 1bar, 1baz), 1qux) or calc(1foo * 1bar / 1baz / 1qux)
 
@@ -36,7 +36,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div($number, 1foo) or calc($number / 1foo)
 
diff --git a/spec/values/numbers/units/multiple/multiple_denominators.hrx b/spec/values/numbers/units/multiple/multiple_denominators.hrx
index e60276ed2..a87bf4c42 100644
--- a/spec/values/numbers/units/multiple/multiple_denominators.hrx
+++ b/spec/values/numbers/units/multiple/multiple_denominators.hrx
@@ -10,7 +10,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1px) or calc(1 / 1px)
 
@@ -22,7 +22,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:20  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1, 1px), 1rad) or calc(1 / 1px / 1rad)
 
diff --git a/spec/values/numbers/units/multiple/multiplication_cancels_both.hrx b/spec/values/numbers/units/multiple/multiplication_cancels_both.hrx
index 9b670cd49..4529c5e9e 100644
--- a/spec/values/numbers/units/multiple/multiplication_cancels_both.hrx
+++ b/spec/values/numbers/units/multiple/multiplication_cancels_both.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1ms, 1px) or calc(1ms / 1px)
 
diff --git a/spec/values/numbers/units/multiple/multiplication_cancels_compatible.hrx b/spec/values/numbers/units/multiple/multiplication_cancels_compatible.hrx
index e0bb186ab..0d2fd3d71 100644
--- a/spec/values/numbers/units/multiple/multiplication_cancels_compatible.hrx
+++ b/spec/values/numbers/units/multiple/multiplication_cancels_compatible.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
diff --git a/spec/values/numbers/units/multiple/multiplication_cancels_denominator.hrx b/spec/values/numbers/units/multiple/multiplication_cancels_denominator.hrx
index 16a8791a8..76fb7ec0c 100644
--- a/spec/values/numbers/units/multiple/multiplication_cancels_denominator.hrx
+++ b/spec/values/numbers/units/multiple/multiplication_cancels_denominator.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
diff --git a/spec/values/numbers/units/multiple/multiplication_cancels_denominator_twice.hrx b/spec/values/numbers/units/multiple/multiplication_cancels_denominator_twice.hrx
index af9cfcc4e..71047d592 100644
--- a/spec/values/numbers/units/multiple/multiplication_cancels_denominator_twice.hrx
+++ b/spec/values/numbers/units/multiple/multiplication_cancels_denominator_twice.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
diff --git a/spec/values/numbers/units/multiple/multiplication_cancels_numerator.hrx b/spec/values/numbers/units/multiple/multiplication_cancels_numerator.hrx
index 620adf4ab..ecb7ae36a 100644
--- a/spec/values/numbers/units/multiple/multiplication_cancels_numerator.hrx
+++ b/spec/values/numbers/units/multiple/multiplication_cancels_numerator.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1px) or calc(1 / 1px)
 
diff --git a/spec/values/numbers/units/multiple/multiplication_cancels_numerator_twice.hrx b/spec/values/numbers/units/multiple/multiplication_cancels_numerator_twice.hrx
index 92d4396a3..e02cd7388 100644
--- a/spec/values/numbers/units/multiple/multiplication_cancels_numerator_twice.hrx
+++ b/spec/values/numbers/units/multiple/multiplication_cancels_numerator_twice.hrx
@@ -11,7 +11,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1px * 1rad, 1ms) or calc(1px * 1rad / 1ms)
 
@@ -23,7 +23,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1px * 1rad, 1ms), 1Hz) or calc(1px * 1rad / 1ms / 1Hz)
 
@@ -35,7 +35,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 2:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1, 1px) or calc(1 / 1px)
 
@@ -47,7 +47,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 4:30  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1, 1px), 1rad) or calc(1 / 1px / 1rad)
 
diff --git a/spec/values/numbers/units/multiple/multiplication_cancels_unknown.hrx b/spec/values/numbers/units/multiple/multiplication_cancels_unknown.hrx
index 9a15e8a77..de0999cf4 100644
--- a/spec/values/numbers/units/multiple/multiplication_cancels_unknown.hrx
+++ b/spec/values/numbers/units/multiple/multiplication_cancels_unknown.hrx
@@ -12,7 +12,7 @@ a {
 }
 
 <===> warning
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(1foo * 1bar, 1baz) or calc(1foo * 1bar / 1baz)
 
@@ -24,7 +24,7 @@ More info and automated migrator: https://sass-lang.com/d/slash-div
   '
     input.scss 3:10  root stylesheet
 
-DEPRECATION WARNING: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
+DEPRECATION WARNING [slash-div]: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.
 
 Recommendation: math.div(math.div(1foo * 1bar, 1baz), 1qux) or calc(1foo * 1bar / 1baz / 1qux)
 
diff --git a/spec/variables.hrx b/spec/variables.hrx
index bb431ec31..f17dd7559 100644
--- a/spec/variables.hrx
+++ b/spec/variables.hrx
@@ -29,7 +29,7 @@ c {
 }
 
 <===> double_flag/default/warning
-DEPRECATION WARNING: !default should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !default should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,
@@ -53,7 +53,7 @@ c {
 }
 
 <===> double_flag/global/warning
-DEPRECATION WARNING: !global should only be written once for each variable.
+DEPRECATION WARNING [duplicate-var-flags]: !global should only be written once for each variable.
 This will be an error in Dart Sass 2.0.0.
 
   ,