diff --git a/test/parallel/test-eventtarget-once-twice.js b/test/parallel/test-eventtarget-once-twice.js
index 3672de47eded1b..f7fbc30ea17ec9 100644
--- a/test/parallel/test-eventtarget-once-twice.js
+++ b/test/parallel/test-eventtarget-once-twice.js
@@ -18,7 +18,7 @@ test('should resolve `once` twice', async () => {
       et.dispatchEvent(new Event('foo'));
       await setImmediate();
       et.dispatchEvent(new Event('foo'));
-    })()
+    })(),
   ]);
 
 });