--- a/browser/extensions/formautofill/test/browser/head.js
+++ b/browser/extensions/formautofill/test/browser/head.js
@@ -229,17 +229,17 @@ function getNotification(index = 0) {
 async function clickDoorhangerButton(button, index) {
   let popuphidden = BrowserTestUtils.waitForEvent(PopupNotifications.panel, "popuphidden");
 
   if (button == MAIN_BUTTON || button == SECONDARY_BUTTON) {
     EventUtils.synthesizeMouseAtCenter(getNotification()[button], {});
   } else if (button == MENU_BUTTON) {
     // Click the dropmarker arrow and wait for the menu to show up.
     await BrowserTestUtils.waitForCondition(() => getNotification().menubutton);
-    await sleep(); // menubutton needs extra time for binding
+    await sleep(2000); // menubutton needs extra time for binding
     let notification = getNotification();
     ok(notification.menubutton, "notification menupopup displayed");
     let dropdownPromise =
       BrowserTestUtils.waitForEvent(notification.menupopup, "popupshown");
     await EventUtils.synthesizeMouseAtCenter(notification.menubutton, {});
     await dropdownPromise;
 
     let actionMenuItem = notification.querySelectorAll("menuitem")[index];