--- a/configuration/config.py	Mon Mar 26 15:46:25 2012 -0700
+++ b/configuration/config.py	Mon Mar 26 15:55:05 2012 -0700
@@ -131,7 +131,7 @@
         # TODO: should probably deepcopy config
 
         # ensure options in configuration are in self.options
-        unknown_options = [i for i in config if i in self.options]
+        unknown_options = [i for i in config if i not in self.options]
         if unknown_options:
             # TODO: more specific error type
             raise Exception("Unknown options: %s" % ', '.join(unknown_options))
@@ -154,7 +154,7 @@
         """add items to configuration and check it"""
         for config in args:
             self.add(config)
-        self.valdate() # validate total configuration
+        self.validate() # validate total configuration
         # TODO: configuration should be locked after this is called
 
     def add(self, config, check=True):

--- a/tests/unit.py	Mon Mar 26 15:46:25 2012 -0700
+++ b/tests/unit.py	Mon Mar 26 15:55:05 2012 -0700
@@ -20,9 +20,17 @@
 
         # parse command line arguments
         options, args = example.parse(['-a', 'ts', '--develop', '-e', '/home/jhammel/bin/firefox'])
+
+        # ensure that the options appropriately get set
         self.assertEqual(bool(args), False) # no arguments
         self.assertEqual(options.develop, True)
-        self.assertEqual(options.activeTests, 'ts')
+        self.assertEqual(options.activeTests, ['ts'])
+        self.assertEqual(options.browser_path, '/home/jhammel/bin/firefox')
+
+        # ensure that the configuration appropriately gets updated
+        self.assertEqual(example.config['develop'], True)
+        self.assertEqual(example.config['activeTests'], ['ts'])
+        self.assertEqual(example.config['browser_path'], '/home/jhammel/bin/firefox')
 
 if __name__ == '__main__':
     unittest.main()