diff --git a/browser/components/privatebrowsing/test/browser/browser.ini b/browser/components/privatebrowsing/test/browser/browser.ini
index fcd03cdde506..d0ee64575c9b 100644
--- a/browser/components/privatebrowsing/test/browser/browser.ini
+++ b/browser/components/privatebrowsing/test/browser/browser.ini
@@ -52,4 +52,3 @@ skip-if = e10s
 skip-if = e10s
 [browser_privatebrowsing_zoomrestore.js]
 skip-if = e10s
-[browser_aboutPrivateBrowsing_openWindow.js]
diff --git a/browser/components/privatebrowsing/test/browser/browser_aboutPrivateBrowsing_openWindow.js b/browser/components/privatebrowsing/test/browser/browser_aboutPrivateBrowsing_openWindow.js
deleted file mode 100644
index 7618f1fe5539..000000000000
--- a/browser/components/privatebrowsing/test/browser/browser_aboutPrivateBrowsing_openWindow.js
+++ /dev/null
@@ -1,26 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use strict";
-
-// Test that clicking "Open a Private Window" button on about:privatebrowsing
-// opens a new private window.
-add_task(function* test_aboutprivatebrowsing_open_window() {
-  let win = yield BrowserTestUtils.openNewBrowserWindow();
-  let browser = win.gBrowser.addTab("about:privatebrowsing").linkedBrowser;
-  yield BrowserTestUtils.browserLoaded(browser);
-
-  let promiseWindowOpened = BrowserTestUtils.domWindowOpened();
-  yield ContentTask.spawn(browser, {}, function* () {
-    content.document.getElementById("startPrivateBrowsing").click();
-  });
-  let private_window = yield promiseWindowOpened;
-
-  ok(PrivateBrowsingUtils.isWindowPrivate(private_window),
-     "The opened window should be private.");
-
-  // Cleanup.
-  yield BrowserTestUtils.closeWindow(private_window);
-  yield BrowserTestUtils.closeWindow(win);
-});
diff --git a/browser/components/privatebrowsing/test/browser/head.js b/browser/components/privatebrowsing/test/browser/head.js
index 38e3baa6f396..7a2ff8946201 100644
--- a/browser/components/privatebrowsing/test/browser/head.js
+++ b/browser/components/privatebrowsing/test/browser/head.js
@@ -2,7 +2,6 @@
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 
 let {PromiseUtils} = Cu.import("resource://gre/modules/PromiseUtils.jsm", {});
-let {PrivateBrowsingUtils} = Cu.import('resource://gre/modules/PrivateBrowsingUtils.jsm', {})
 XPCOMUtils.defineLazyModuleGetter(this, "PlacesTestUtils",
   "resource://testing-common/PlacesTestUtils.jsm");