diff --git a/toolkit/content/tests/chrome/window_panel_focus.xul b/toolkit/content/tests/chrome/window_panel_focus.xul
index 43394cc62885..801a56246f34 100644
--- a/toolkit/content/tests/chrome/window_panel_focus.xul
+++ b/toolkit/content/tests/chrome/window_panel_focus.xul
@@ -3,7 +3,7 @@
 <?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
 
 <window title="Panel Focus Tests"
-  onload="setTimeout(showPanel, 0)"
+  onfocus="setTimeout(showPanel, 0)"
   xmlns:html="http://www.w3.org/1999/xhtml"
   xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">