diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug633788.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug633788.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  waitForExplicitFinish();
+
+  newWindowWithTabView(win => {
+    is(win.gBrowser.tabs.length, 1, "There is only one tab");
+
+    let tab = win.gBrowser.tabs[0];
+    let tabItem = tab._tabViewTabItem;
+    ok(tabItem.parent, "The tab item belongs to a group");
+    let groupId = tabItem.parent.id;
+
+    tab._tabViewTabItem.close();
+
+    whenTabViewIsHidden(function() {
+      // a new tab with group should be opened
+      is(win.gBrowser.tabs.length, 1, "There is still one tab");
+      isnot(win.gBrowser.selectedTab, tab, "The tab is different");
+
+      tab = win.gBrowser.tabs[0];
+      tabItem = tab._tabViewTabItem;
+      ok(tabItem.parent, "This new tab item belongs to a group");
+
+      is(tabItem.parent.id, groupId, "The group is different");
+
+      promiseWindowClosed(win).then(finish);
+    }, win);
+  });
+}