diff --git a/Example/OpenSwiftUIUITests/Animation/Animation/AnimationCompletionUITests.swift b/Example/OpenSwiftUIUITests/Animation/Animation/AnimationCompletionUITests.swift
index be51e8ef5..0783a8781 100644
--- a/Example/OpenSwiftUIUITests/Animation/Animation/AnimationCompletionUITests.swift
+++ b/Example/OpenSwiftUIUITests/Animation/Animation/AnimationCompletionUITests.swift
@@ -47,7 +47,7 @@ struct AnimationCompletionUITests {
         }
         // When run seperately, precision: 1.0 works fine
         // but in the full suite, it will hit the same issue of #340
-        withKnownIssue("#340", isIntermittent: true) {
+        withKnownIssue("#690", isIntermittent: true) {
             openSwiftUIAssertAnimationSnapshot(
                 of: ContentView()
             )
diff --git a/Example/OpenSwiftUIUITests/Animation/Animation/BezierAnimationUITests.swift b/Example/OpenSwiftUIUITests/Animation/Animation/BezierAnimationUITests.swift
index 8d60a0e4f..9e5f6b7a2 100644
--- a/Example/OpenSwiftUIUITests/Animation/Animation/BezierAnimationUITests.swift
+++ b/Example/OpenSwiftUIUITests/Animation/Animation/BezierAnimationUITests.swift
@@ -77,7 +77,7 @@ struct BezierAnimationUITests {
         }
         // When run seperately, precision: 1.0 works fine
         // but in the full suite, it will hit the same issue of #340
-        withKnownIssue("$340", isIntermittent: true) {
+        withKnownIssue("$690", isIntermittent: true) {
             openSwiftUIAssertAnimationSnapshot(
                 of: ContentView(),
             )
diff --git a/Example/OpenSwiftUIUITests/Animation/Animation/RepeatAnimationUITests.swift b/Example/OpenSwiftUIUITests/Animation/Animation/RepeatAnimationUITests.swift
index a97eb0291..524ba3ae3 100644
--- a/Example/OpenSwiftUIUITests/Animation/Animation/RepeatAnimationUITests.swift
+++ b/Example/OpenSwiftUIUITests/Animation/Animation/RepeatAnimationUITests.swift
@@ -31,7 +31,7 @@ struct RepeatAnimationUITests {
                     }
             }
         }
-        withKnownIssue("#340", isIntermittent: true) {
+        withKnownIssue("#690", isIntermittent: true) {
             openSwiftUIAssertAnimationSnapshot(
                 of: ContentView(autoreverses: autoreverses),
                 testName: #function + "\(autoreverses)"
diff --git a/Example/OpenSwiftUIUITests/Graphic/Color/ColorUITests.swift b/Example/OpenSwiftUIUITests/Graphic/Color/ColorUITests.swift
index 3b30bfc44..846bcd72a 100644
--- a/Example/OpenSwiftUIUITests/Graphic/Color/ColorUITests.swift
+++ b/Example/OpenSwiftUIUITests/Graphic/Color/ColorUITests.swift
@@ -75,7 +75,7 @@ struct ColorUITests {
                     }
             }
         }
-        withKnownIssue("#340", isIntermittent: true) {
+        withKnownIssue("#690", isIntermittent: true) {
             openSwiftUIAssertAnimationSnapshot(of: ContentView())
         }
     }
diff --git a/Example/OpenSwiftUIUITests/Layout/Stack/ZStackUITests.swift b/Example/OpenSwiftUIUITests/Layout/Stack/ZStackUITests.swift
index 839d7055a..12fc98c7c 100644
--- a/Example/OpenSwiftUIUITests/Layout/Stack/ZStackUITests.swift
+++ b/Example/OpenSwiftUIUITests/Layout/Stack/ZStackUITests.swift
@@ -87,9 +87,7 @@ struct ZStackUITests {
             }
         }
         openSwiftUIAssertSnapshot(
-            of: ContentView(),
-            // FIXME: Workaround #340
-            perceptualPrecision: 0.99
+            of: ContentView()
         )
     }
 }
diff --git a/Example/OpenSwiftUIUITests/UITests/Initialize.c b/Example/OpenSwiftUIUITests/UITests/Initialize.c
new file mode 100644
index 000000000..677e64564
--- /dev/null
+++ b/Example/OpenSwiftUIUITests/UITests/Initialize.c
@@ -0,0 +1,15 @@
+//
+//  Initialize.c
+//  OpenSwiftUIUITests
+//
+//  Created by Kyle on 12/29/25.
+//
+
+#include "Initialize.h"
+#include <stdio.h>
+
+extern void OpenSwiftUIUITests_InitializeSwift(void);
+
+static void OpenSwiftUIUITests_Initialize(void) {
+    OpenSwiftUIUITests_InitializeSwift();
+}
diff --git a/Example/OpenSwiftUIUITests/UITests/Initialize.h b/Example/OpenSwiftUIUITests/UITests/Initialize.h
new file mode 100644
index 000000000..c640b131c
--- /dev/null
+++ b/Example/OpenSwiftUIUITests/UITests/Initialize.h
@@ -0,0 +1,11 @@
+//
+//  Initialize.h
+//  OpenSwiftUIUITests
+//
+//  Created by Kyle on 12/29/25.
+//
+
+#pragma once
+
+__attribute__((constructor, used))
+static void OpenSwiftUIUITests_Initialize(void);
diff --git a/Example/OpenSwiftUIUITests/UITests/Initialize.swift b/Example/OpenSwiftUIUITests/UITests/Initialize.swift
new file mode 100644
index 000000000..97c321c34
--- /dev/null
+++ b/Example/OpenSwiftUIUITests/UITests/Initialize.swift
@@ -0,0 +1,18 @@
+//
+//  Initialize.swift
+//  OpenSwiftUIUITests
+//
+//  Created by Kyle on 12/29/25.
+//
+
+#if OPENSWIFTUI
+@_spi(ForTestOnly)
+import OpenSwiftUI
+#endif
+
+@_cdecl("OpenSwiftUIUITests_InitializeSwift")
+func __initialize() -> () {
+    #if OPENSWIFTUI
+    Color.Resolved._alignWithSwiftUIImplementation = true
+    #endif
+}