diff --git a/testing/web-platform/tests/native-io/rename_async_failure_handling.tentative.https.any.js b/testing/web-platform/tests/native-io/rename_async_failure_handling.tentative.https.any.js
index 5e0f96408bb7..64ea24fa65eb 100644
--- a/testing/web-platform/tests/native-io/rename_async_failure_handling.tentative.https.any.js
+++ b/testing/web-platform/tests/native-io/rename_async_failure_handling.tentative.https.any.js
@@ -93,8 +93,8 @@ promise_test(async testCase => {
   closed_file.close();
   const opened_file = await nativeIO.open('opened_file');
   testCase.add_cleanup(async () => {
-    closed_file.close();
-    opened_file.close();
+    await closed_file.close();
+    await opened_file.close();
     await nativeIO.delete('closed_file');
     await nativeIO.delete('opened_file');
   });