1 files changed, 1 insertions, 1 deletions
diff --git a/browser/components/urlbar/tests/browser/browser_switchTab_override.js b/browser/components/urlbar/tests/browser/browser_switchTab_override.js
index 66426a154b..507c975cba 100644
--- a/browser/components/urlbar/tests/browser/browser_switchTab_override.js
+++ b/browser/components/urlbar/tests/browser/browser_switchTab_override.js
@@ -54,7 +54,7 @@ add_task(async function test_switchtab_override() {
   info("Override switch-to-tab");
   let deferred = Promise.withResolvers();
   // In case of failure this would switch tab.
-  let onTabSelect = event => {
+  let onTabSelect = () => {
     deferred.reject(new Error("Should have overridden switch to tab"));
   };
   gBrowser.tabContainer.addEventListener("TabSelect", onTabSelect);