1 files changed, 1 insertions, 1 deletions
diff --git a/toolkit/components/extensions/test/xpcshell/test_ext_downloads_partitionKey.js b/toolkit/components/extensions/test/xpcshell/test_ext_downloads_partitionKey.js
index 3326ed0ce9..169a147e0d 100644
--- a/toolkit/components/extensions/test/xpcshell/test_ext_downloads_partitionKey.js
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_downloads_partitionKey.js
@@ -29,7 +29,7 @@ let downloadDir;
 function observeDownloadChannel(uri, partitionKey, isPrivate) {
   return new Promise(resolve => {
     let observer = {
-      observe(subject, topic, data) {
+      observe(subject, topic) {
         if (topic === "http-on-modify-request") {
           let httpChannel = subject.QueryInterface(Ci.nsIHttpChannel);
           if (httpChannel.URI.spec != uri) {