1 files changed, 1 insertions, 1 deletions
diff --git a/toolkit/components/thumbnails/test/browser_thumbnails_bug818225.js b/toolkit/components/thumbnails/test/browser_thumbnails_bug818225.js
index 5f557c40a4..37f9b2f7d7 100644
--- a/toolkit/components/thumbnails/test/browser_thumbnails_bug818225.js
+++ b/toolkit/components/thumbnails/test/browser_thumbnails_bug818225.js
@@ -17,7 +17,7 @@ add_task(async function thumbnails_bg_bug818225() {
       gBrowser,
       url: URL,
     },
-    async browser => {
+    async () => {
       gBrowserThumbnails.clearTopSiteURLCache();
       await whenFileExists(URL);
     }