diff --git a/packages/flutter/test/widgets/custom_painter_test.dart b/packages/flutter/test/widgets/custom_painter_test.dart
index c27317e1ca..23d870a988 100644
--- a/packages/flutter/test/widgets/custom_painter_test.dart
+++ b/packages/flutter/test/widgets/custom_painter_test.dart
@@ -356,6 +356,8 @@ void _defineTests() {
     final Set<SemanticsAction> allActions = SemanticsAction.values.toSet()
       ..remove(SemanticsAction.customAction) // customAction is not user-exposed.
       ..remove(SemanticsAction.showOnScreen) // showOnScreen is not user-exposed
+      // TODO(LongCatIsLooong): change to `SemanticsAction.scrollToOffset` when available.
+      // https://github.com/flutter/flutter/issues/159515.
       ..removeWhere((SemanticsAction action) => action.index == 1 << 23);
 
     const int expectedId = 2;
@@ -379,6 +381,9 @@ void _defineTests() {
     final SemanticsOwner semanticsOwner = tester.binding.pipelineOwner.semanticsOwner!;
     int expectedLength = 1;
     for (final SemanticsAction action in allActions) {
+      // TODO(LongCatIsLooong): remove after `SemanticsAction.scrollToOffset` is added to dart:ui.
+      // https://github.com/flutter/flutter/issues/159515.
+      // ignore: exhaustive_cases
       switch (action) {
         case SemanticsAction.moveCursorBackwardByCharacter:
         case SemanticsAction.moveCursorForwardByCharacter:
diff --git a/packages/flutter/test/widgets/semantics_test.dart b/packages/flutter/test/widgets/semantics_test.dart
index 171c04a176..eb89e3be4b 100644
--- a/packages/flutter/test/widgets/semantics_test.dart
+++ b/packages/flutter/test/widgets/semantics_test.dart
@@ -525,6 +525,8 @@ void main() {
       ..remove(SemanticsAction.moveCursorBackwardByWord)
       ..remove(SemanticsAction.customAction) // customAction is not user-exposed.
       ..remove(SemanticsAction.showOnScreen) // showOnScreen is not user-exposed
+      // TODO(LongCatIsLooong): change to `SemanticsAction.scrollToOffset` when available.
+      // https://github.com/flutter/flutter/issues/159515.
       ..removeWhere((SemanticsAction action) => action.index == 1 << 23);
 
     const int expectedId = 1;
@@ -543,6 +545,9 @@ void main() {
     final SemanticsOwner semanticsOwner = tester.binding.pipelineOwner.semanticsOwner!;
     int expectedLength = 1;
     for (final SemanticsAction action in allActions) {
+      // TODO(LongCatIsLooong): remove after `SemanticsAction.scrollToOffset` is added to dart:ui.
+      // https://github.com/flutter/flutter/issues/159515.
+      // ignore: exhaustive_cases
       switch (action) {
         case SemanticsAction.moveCursorBackwardByCharacter:
         case SemanticsAction.moveCursorForwardByCharacter: