1 files changed, 1 insertions, 1 deletions
diff --git a/toolkit/components/alerts/test/test_invalid_utf16.html b/toolkit/components/alerts/test/test_invalid_utf16.html
index a4f862238c..5d7fa9c079 100644
--- a/toolkit/components/alerts/test/test_invalid_utf16.html
+++ b/toolkit/components/alerts/test/test_invalid_utf16.html
@@ -18,7 +18,7 @@
       let promise = new Promise((res, rej) => {resolve = res; reject = rej});
 
       let success = false;
-      function observe(aSubject, aTopic, aData) {
+      function observe(aSubject, aTopic) {
         if (aTopic == "alertshow") {
           success = true;
           notifier.closeAlert(alertName);