1 files changed, 2 insertions, 2 deletions
diff --git a/browser/base/content/test/performance/browser_tabdetach.js b/browser/base/content/test/performance/browser_tabdetach.js
index a860362f1f..3cbdde50fc 100644
--- a/browser/base/content/test/performance/browser_tabdetach.js
+++ b/browser/base/content/test/performance/browser_tabdetach.js
@@ -59,7 +59,7 @@ add_task(async function test_detach_not_overflowed() {
       expectedReflows: EXPECTED_REFLOWS,
       // we are opening a whole new window, so there's no point in tracking
       // rects being painted
-      frames: { filter: rects => [] },
+      frames: { filter: () => [] },
     }
   );
 
@@ -87,7 +87,7 @@ add_task(async function test_detach_overflowed() {
       expectedReflows: EXPECTED_REFLOWS,
       // we are opening a whole new window, so there's no point in tracking
       // rects being painted
-      frames: { filter: rects => [] },
+      frames: { filter: () => [] },
     }
   );