1 files changed, 1 insertions, 1 deletions
diff --git a/browser/components/places/tests/browser/browser_toolbar_overflow.js b/browser/components/places/tests/browser/browser_toolbar_overflow.js
index 3f16c2a126..216ad56700 100644
--- a/browser/components/places/tests/browser/browser_toolbar_overflow.js
+++ b/browser/components/places/tests/browser/browser_toolbar_overflow.js
@@ -419,7 +419,7 @@ async function toggleToolbar(show, expectedMinChildCount = 0) {
     if (getPlacesChildren().length < expectedMinChildCount) {
       await new Promise(resolve => {
         info("Waiting for bookmark elements to appear");
-        let mut = new MutationObserver(mutations => {
+        let mut = new MutationObserver(() => {
           let children = getPlacesChildren();
           info(`${children.length} bookmark elements appeared`);
           if (children.length >= expectedMinChildCount) {