diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug696602.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug696602.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,51 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+let win;
+
+function test() {
+  waitForExplicitFinish();
+
+  newWindowWithTabView(function(newWin) {
+    win = newWin;
+
+    registerCleanupFunction(function() {
+      win.close();
+    });
+
+    let cw = win.TabView.getContentWindow();
+    let groupItemOne = cw.GroupItems.groupItems[0];
+    let groupItemTwo = createGroupItemWithBlankTabs(win, 300, 300, 20, 10);
+
+    is(win.gBrowser.tabContainer.getAttribute("overflow"), "true",
+       "The tabstrip is overflow");
+
+    is(groupItemOne.getChildren().length, 10, "Group one has 10 tabs");
+    is(groupItemTwo.getChildren().length, 10, "Group two has 10 tabs");
+
+    checkSelectedTabVisible("two", function() {
+      showTabView(function() {
+        checkSelectedTabVisible("one", finish);
+        groupItemOne.getChild(9).zoomIn();
+      }, win);
+    });
+    groupItemTwo.getChild(9).zoomIn();
+  }, function(newWin) {
+    for (let i = 0; i < 9; i++)
+      newWin.gBrowser.addTab();
+  });
+}
+
+function isSelectedTabVisible() {
+  let tabstrip = win.gBrowser.tabContainer.mTabstrip;
+  let scrollRect = tabstrip.scrollClientRect;
+  let tab = win.gBrowser.selectedTab.getBoundingClientRect();
+
+  return (scrollRect.left <= tab.left && tab.right <= scrollRect.right);
+}
+
+function checkSelectedTabVisible(groupName, callback) {
+  whenTabViewIsHidden(function() {
+    ok(isSelectedTabVisible(), "Group " + groupName + " selected tab is visible");
+    callback();
+  }, win);
+}