diff --git a/test/game/pinball_game_test.dart b/test/game/pinball_game_test.dart
index b0f6fc25..a6e74aaa 100644
--- a/test/game/pinball_game_test.dart
+++ b/test/game/pinball_game_test.dart
@@ -69,8 +69,7 @@ void main() {
           await game.ready();
           await game.ensureAdd(alienZone);
 
-          final flutterForest = alienZone.descendants().whereType<AlienZone>();
-          expect(flutterForest.length, equals(1));
+          expect(game.children.whereType<AlienZone>().length, equals(1));
         },
       );