diff --git a/Tests/Runtime/ObjectAdapterPlayTests.cs b/Tests/Runtime/ObjectAdapterPlayTests.cs
index edc3375..d44d694 100755
--- a/Tests/Runtime/ObjectAdapterPlayTests.cs
+++ b/Tests/Runtime/ObjectAdapterPlayTests.cs
@@ -270,3 +270,5 @@ private IEnumerator SimulateSceneTransition() {
     yield return SceneManager.SetActiveScene(originScene);
   }
 }
+
+} // namespace