diff --git a/test/game/components/spaceship_exit_rail_test.dart b/test/game/components/spaceship_exit_rail_test.dart
index dfec8513..f8f361b9 100644
--- a/test/game/components/spaceship_exit_rail_test.dart
+++ b/test/game/components/spaceship_exit_rail_test.dart
@@ -31,6 +31,8 @@ void main() {
       when(() => fixture.filterData).thenReturn(filterData);
     });
 
+   // TODO(alestiago): Make ContactCallback private and use `beginContact`
+   // instead.
     group('SpaceshipExitHoleBallContactCallback', () {
       setUp(() {
         when(() => ball.priority).thenReturn(1);