diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug606657.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug606657.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  waitForExplicitFinish();
+
+  showTabView(function () {
+    let [tab] = gBrowser.tabs;
+    let groupId = tab._tabViewTabItem.parent.id;
+
+    TabView.moveTabTo(tab, groupId);
+    is(tab._tabViewTabItem.parent.id, groupId, 'tab did not change its group');
+
+    hideTabView(finish);
+  });
+}