diff --git a/tools/tinderbox/tinder-defaults.pl b/tools/tinderbox/tinder-defaults.pl
index 137cae0f897c..02f7aefa3109 100644
--- a/tools/tinderbox/tinder-defaults.pl
+++ b/tools/tinderbox/tinder-defaults.pl
@@ -25,6 +25,7 @@ $DomToTextConversionTest  = 0;
 $MailNewsTest             = 0;  # Bit-rotted, currently not working.
 $EmbedTest                = 0;  # Assumes you wanted $BuildEmbed=1
 $LayoutPerformanceTest    = 0;
+$XULWindowOpenTest        = 0;
 $StartupPerformanceTest   = 0;
 $TestsPhoneHome           = 0;  # Should test report back to server?
 
@@ -32,6 +33,7 @@ $BloatTestTimeout  = 120;    # seconds
 $DomTestTimeout	   = 45;     # seconds
 $LayoutPerformanceTestTimeout   = 1200;  # seconds
 $StartupPerformanceTestTimeout  = 60;    # seconds
+$XULOpenWindowTestTimeout	= 300;   # seconds
 
 $MozConfigFileName = 'mozconfig';
 $MozProfileName = 'default';