diff -r 000000000000 -r 6474c204b198 browser/base/content/test/general/browser_bug405137.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/general/browser_bug405137.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+function test(){
+  var tab = gBrowser.addTab();
+  ok(tab.getAttribute("closetabtext") != "", "tab has non-empty closetabtext");
+  gBrowser.removeTab(tab);  
+}