diff --git a/test/asset/worker.js b/test/asset/worker.js
index 95e3ab8a8..a44463045 100644
--- a/test/asset/worker.js
+++ b/test/asset/worker.js
@@ -14,4 +14,4 @@ addEventListener('message', function(e) {
     }
     postMessage(_.VERSION);
   }
-}, false);
+});