1 files changed, 1 insertions, 1 deletions
diff --git a/browser/components/urlbar/tests/browser/browser_selectStaleResults.js b/browser/components/urlbar/tests/browser/browser_selectStaleResults.js
index c381478712..97f3768881 100644
--- a/browser/components/urlbar/tests/browser/browser_selectStaleResults.js
+++ b/browser/components/urlbar/tests/browser/browser_selectStaleResults.js
@@ -258,7 +258,7 @@ add_task(async function staleReplacedWithFresh() {
   //   test2
   //   test1
   let mutationPromise = new Promise(resolve => {
-    let observer = new MutationObserver(mutations => {
+    let observer = new MutationObserver(() => {
       let row = UrlbarTestUtils.getRowAt(window, maxResults - 2);
       if (row && row._elements.get("title").textContent == "test2") {
         observer.disconnect();