diff --git a/testing/web-platform/meta/trusted-types/TrustedTypePolicyFactory-getPropertyType.tentative.html.ini b/testing/web-platform/meta/trusted-types/TrustedTypePolicyFactory-getPropertyType.tentative.html.ini
index ccfb73756e6d..f4f0a4e3cd38 100644
--- a/testing/web-platform/meta/trusted-types/TrustedTypePolicyFactory-getPropertyType.tentative.html.ini
+++ b/testing/web-platform/meta/trusted-types/TrustedTypePolicyFactory-getPropertyType.tentative.html.ini
@@ -13,3 +13,6 @@
 
   [getAttributeType with explicit elementNs and attrNs parameters]
     expected: FAIL
+
+  [getAttributeType with qualified attribute name]
+    expected: FAIL
diff --git a/testing/web-platform/tests/trusted-types/TrustedTypePolicyFactory-getPropertyType.tentative.html b/testing/web-platform/tests/trusted-types/TrustedTypePolicyFactory-getPropertyType.tentative.html
index a19c685b52ab..50b1fb55ddbc 100644
--- a/testing/web-platform/tests/trusted-types/TrustedTypePolicyFactory-getPropertyType.tentative.html
+++ b/testing/web-platform/tests/trusted-types/TrustedTypePolicyFactory-getPropertyType.tentative.html
@@ -134,5 +134,10 @@
     assert_equals(trustedTypes.getAttributeType("script", "href", NSURI_SVG.toUpperCase(), NSURI_XLINK), null, "case-sensitiveness of elementNs");
     assert_equals(trustedTypes.getAttributeType("script", "href", NSURI_SVG, NSURI_XLINK.toUpperCase()), null, "case-sensitiveness of attrNs");
   }, "getAttributeType with explicit elementNs and attrNs parameters");
+
+  test(t => {
+    assert_equals(trustedTypes.getAttributeType("script", "href", NSURI_SVG, NSURI_XLINK), "TrustedScriptURL", "local name 'href'");
+    assert_equals(trustedTypes.getAttributeType("script", "xlink:href", NSURI_SVG, NSURI_XLINK), null, "qualified name 'xlink:href'");
+  }, "getAttributeType with qualified attribute name");
 </script>
 </body>