diff --git a/test/triggerEvent/triggerEvent.js b/test/triggerEvent/triggerEvent.js
index 2ed952fad..8c6b1afd6 100644
--- a/test/triggerEvent/triggerEvent.js
+++ b/test/triggerEvent/triggerEvent.js
@@ -1,3 +1,3 @@
-const triggerEvent = (el, eventType, detail = undefined) =>
-  el.dispatchEvent(new CustomEvent(eventType, { detail: detail }));
+const triggerEvent = (el, eventType, detail) =>
+  el.dispatchEvent(new CustomEvent(eventType, { detail }));
 module.exports = triggerEvent;