diff --git a/lib/web_ui/test/engine/semantics/semantics_tester.dart b/lib/web_ui/test/engine/semantics/semantics_tester.dart
index ad61eb34c6998..dd3fcb5ad9512 100644
--- a/lib/web_ui/test/engine/semantics/semantics_tester.dart
+++ b/lib/web_ui/test/engine/semantics/semantics_tester.dart
@@ -198,70 +198,70 @@ class SemanticsTester {
 
     // Actions
     if (hasTap == true) {
-      actions != ui.SemanticsAction.tap.index;
+      actions |= ui.SemanticsAction.tap.index;
     }
     if (hasLongPress == true) {
-      actions != ui.SemanticsAction.longPress.index;
+      actions |= ui.SemanticsAction.longPress.index;
     }
     if (hasScrollLeft == true) {
-      actions != ui.SemanticsAction.scrollLeft.index;
+      actions |= ui.SemanticsAction.scrollLeft.index;
     }
     if (hasScrollRight == true) {
-      actions != ui.SemanticsAction.scrollRight.index;
+      actions |= ui.SemanticsAction.scrollRight.index;
     }
     if (hasScrollUp == true) {
-      actions != ui.SemanticsAction.scrollUp.index;
+      actions |= ui.SemanticsAction.scrollUp.index;
     }
     if (hasScrollDown == true) {
-      actions != ui.SemanticsAction.scrollDown.index;
+      actions |= ui.SemanticsAction.scrollDown.index;
     }
     if (hasIncrease == true) {
-      actions != ui.SemanticsAction.increase.index;
+      actions |= ui.SemanticsAction.increase.index;
     }
     if (hasDecrease == true) {
-      actions != ui.SemanticsAction.decrease.index;
+      actions |= ui.SemanticsAction.decrease.index;
     }
     if (hasShowOnScreen == true) {
-      actions != ui.SemanticsAction.showOnScreen.index;
+      actions |= ui.SemanticsAction.showOnScreen.index;
     }
     if (hasMoveCursorForwardByCharacter == true) {
-      actions != ui.SemanticsAction.moveCursorForwardByCharacter.index;
+      actions |= ui.SemanticsAction.moveCursorForwardByCharacter.index;
     }
     if (hasMoveCursorBackwardByCharacter == true) {
-      actions != ui.SemanticsAction.moveCursorBackwardByCharacter.index;
+      actions |= ui.SemanticsAction.moveCursorBackwardByCharacter.index;
     }
     if (hasSetSelection == true) {
-      actions != ui.SemanticsAction.setSelection.index;
+      actions |= ui.SemanticsAction.setSelection.index;
     }
     if (hasCopy == true) {
-      actions != ui.SemanticsAction.copy.index;
+      actions |= ui.SemanticsAction.copy.index;
     }
     if (hasCut == true) {
-      actions != ui.SemanticsAction.cut.index;
+      actions |= ui.SemanticsAction.cut.index;
     }
     if (hasPaste == true) {
-      actions != ui.SemanticsAction.paste.index;
+      actions |= ui.SemanticsAction.paste.index;
     }
     if (hasDidGainAccessibilityFocus == true) {
-      actions != ui.SemanticsAction.didGainAccessibilityFocus.index;
+      actions |= ui.SemanticsAction.didGainAccessibilityFocus.index;
     }
     if (hasDidLoseAccessibilityFocus == true) {
-      actions != ui.SemanticsAction.didLoseAccessibilityFocus.index;
+      actions |= ui.SemanticsAction.didLoseAccessibilityFocus.index;
     }
     if (hasCustomAction == true) {
-      actions != ui.SemanticsAction.customAction.index;
+      actions |= ui.SemanticsAction.customAction.index;
     }
     if (hasDismiss == true) {
-      actions != ui.SemanticsAction.dismiss.index;
+      actions |= ui.SemanticsAction.dismiss.index;
     }
     if (hasMoveCursorForwardByWord == true) {
-      actions != ui.SemanticsAction.moveCursorForwardByWord.index;
+      actions |= ui.SemanticsAction.moveCursorForwardByWord.index;
     }
     if (hasMoveCursorBackwardByWord == true) {
-      actions != ui.SemanticsAction.moveCursorBackwardByWord.index;
+      actions |= ui.SemanticsAction.moveCursorBackwardByWord.index;
     }
     if (hasSetText == true) {
-      actions != ui.SemanticsAction.setText.index;
+      actions |= ui.SemanticsAction.setText.index;
     }
 
     // Other attributes