1 files changed, 1 insertions, 1 deletions
diff --git a/toolkit/components/search/tests/xpcshell/test_engine_set_alias.js b/toolkit/components/search/tests/xpcshell/test_engine_set_alias.js
index ec79fe6783..f15e257996 100644
--- a/toolkit/components/search/tests/xpcshell/test_engine_set_alias.js
+++ b/toolkit/components/search/tests/xpcshell/test_engine_set_alias.js
@@ -119,7 +119,7 @@ add_task(async function test_engine_change_alias() {
   );
 
   let observed = false;
-  Services.obs.addObserver(function observer(aSubject, aTopic, aData) {
+  Services.obs.addObserver(function observer() {
     observed = true;
   }, SearchUtils.TOPIC_ENGINE_MODIFIED);