diff -r 000000000000 -r 6474c204b198 browser/base/content/test/newtab/browser_newtab_reset.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/newtab/browser_newtab_reset.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/*
+ * These tests make sure that resetting the 'New Tage Page' works as expected.
+ */
+function runTests() {
+  // Disabled until bug 716543 is fixed.
+  return;
+
+  // create a new tab page and check its modified state after blocking a site
+  yield setLinks("0,1,2,3,4,5,6,7,8");
+  setPinnedLinks("");
+
+  yield addNewTabPageTab();
+  let resetButton = getContentDocument().getElementById("toolbar-button-reset");
+
+  checkGrid("0,1,2,3,4,5,6,7,8");
+  ok(!resetButton.hasAttribute("modified"), "page is not modified");
+
+  yield blockCell(4);
+  checkGrid("0,1,2,3,5,6,7,8,");
+  ok(resetButton.hasAttribute("modified"), "page is modified");
+
+  yield getContentWindow().gToolbar.reset(TestRunner.next);
+  checkGrid("0,1,2,3,4,5,6,7,8");
+  ok(!resetButton.hasAttribute("modified"), "page is not modified");
+}