1 files changed, 1 insertions, 1 deletions
diff --git a/devtools/client/shared/test/doc_layoutHelpers_getBoxQuads2-c-and-e.html b/devtools/client/shared/test/doc_layoutHelpers_getBoxQuads2-c-and-e.html
index 7917c82411..d31aa30e73 100644
--- a/devtools/client/shared/test/doc_layoutHelpers_getBoxQuads2-c-and-e.html
+++ b/devtools/client/shared/test/doc_layoutHelpers_getBoxQuads2-c-and-e.html
@@ -2,7 +2,7 @@
 <meta charset=utf-8>
 <script>
 'use strict';
-window.onmessage = event => {
+window.onmessage = () => {
   const innerNode = window.document.getElementById("inner-node");
   const wrappedNode = SpecialPowers.wrap(innerNode);
   const wrappedQuads = wrappedNode.getBoxQuadsFromWindowOrigin();