1 files changed, 2 insertions, 2 deletions
diff --git a/browser/base/content/test/general/head.js b/browser/base/content/test/general/head.js
index f7b4a0d93b..94f60f2936 100644
--- a/browser/base/content/test/general/head.js
+++ b/browser/base/content/test/general/head.js
@@ -165,7 +165,7 @@ function promiseOpenAndLoadWindow(aOptions, aWaitForDelayedStartup = false) {
   return new Promise(resolve => {
     let win = OpenBrowserWindow(aOptions);
     if (aWaitForDelayedStartup) {
-      Services.obs.addObserver(function onDS(aSubject, aTopic, aData) {
+      Services.obs.addObserver(function onDS(aSubject) {
         if (aSubject != win) {
           return;
         }
@@ -185,7 +185,7 @@ function promiseOpenAndLoadWindow(aOptions, aWaitForDelayedStartup = false) {
 }
 
 async function whenNewTabLoaded(aWindow, aCallback) {
-  aWindow.BrowserOpenTab();
+  aWindow.BrowserCommands.openTab();
 
   let expectedURL = AboutNewTab.newTabURL;
   let browser = aWindow.gBrowser.selectedBrowser;