1 files changed, 1 insertions, 1 deletions
diff --git a/toolkit/mozapps/extensions/test/xpcshell/rs-blocklist/test_gfxBlacklist_Device.js b/toolkit/mozapps/extensions/test/xpcshell/rs-blocklist/test_gfxBlacklist_Device.js
index 9b1d84b77d..68c9357356 100644
--- a/toolkit/mozapps/extensions/test/xpcshell/rs-blocklist/test_gfxBlacklist_Device.js
+++ b/toolkit/mozapps/extensions/test/xpcshell/rs-blocklist/test_gfxBlacklist_Device.js
@@ -63,7 +63,7 @@ async function run_test() {
     do_test_finished();
   }
 
-  Services.obs.addObserver(function (aSubject, aTopic, aData) {
+  Services.obs.addObserver(function () {
     // If we wait until after we go through the event loop, gfxInfo is sure to
     // have processed the gfxItems event.
     executeSoon(checkBlacklist);