--- a/mozillatry.py	Tue Dec 04 13:22:39 2012 -0800
+++ b/mozillatry.py	Tue Dec 04 14:33:04 2012 -0800
@@ -92,10 +92,12 @@
     def __init__(self):
         configuration.Configuration.__init__(self, usage=self.usage, load='--config')
 
-    def check(self, config):
+    def validate(self):
         """check configuration"""
 
-        if (not config.get('opt')) and (not config.get('debug')):
+        configuration.Configuration.validate(self)
+
+        if (not self.config.get('opt')) and (not self.config.get('debug')):
             raise ConfigurationError("Must have opt or debug builds")