diff --git a/webapprt/test/chrome/downloads/browser_add_download.js b/webapprt/test/chrome/downloads/browser_add_download.js
index 2db323bf686..68519ee5066 100644
--- a/webapprt/test/chrome/downloads/browser_add_download.js
+++ b/webapprt/test/chrome/downloads/browser_add_download.js
@@ -37,7 +37,7 @@ function test() {
   waitForExplicitFinish();
 
   loadWebapp("download.webapp", undefined, function onLoad() {
-    for each (let download in downloadsInList) {
+    for (let download of downloadsInList) {
       list.addDownload(download);
     }
   });
diff --git a/webapprt/test/chrome/head.js b/webapprt/test/chrome/head.js
index 3a24ae51759..f8b065700ec 100644
--- a/webapprt/test/chrome/head.js
+++ b/webapprt/test/chrome/head.js
@@ -168,9 +168,9 @@ function waitDownloadListPopulation(aWin) {
     let disconnected = false;
 
     var observer = new MutationObserver(function(aMutations) {
-      for each (let mutation in aMutations) {
+      for (let mutation of aMutations) {
         if (mutation.addedNodes) {
-          for each (let node in mutation.addedNodes) {
+          for (let node of mutation.addedNodes) {
             if (node.id == "downloadView") {
               observer.disconnect();
               disconnected = true;