Test wasn't relevant enough, this fix makes it much faster as well.

longerusername/tests.py

@@ -1,19 +1,30 @@
 from django.contrib.auth.models import User
 from django.test import TestCase
 
+
 class LongerUsernameTests(TestCase):
     """
     Unit tests for longerusername app
     """
+
     def setUp(self):
-        """
-        creates a user with a terribly long username
-        """
+        """creates a user with a terribly long username"""
         long_username = ''.join([str(i) for i  in range(100)])
-        self.user = User.objects.create_user('test' + long_username, '[email protected]', 'testpassword')
-    def testUserCreation(self):
+        self.user = User.objects.create_user('test' + long_username,
+            '[email protected]', 'testpassword')
+
+    def test_user_creation(self):
         """
         tests that self.user was successfully saved, and can be retrieved
         """
         self.assertNotEqual(self.user,None)
-        User.objects.get(id=self.user.id) # returns DoesNotExist error if the user wasn't created
+        # returns DoesNotExist error if the user wasn't created
+        User.objects.get(id=self.user.id)
+
+    def test_username_max_length(self):
+        """
+        tests that User.username field has now a max_length = 255 instead of
+        the django default 30
+        """
+        self.assertEqual(User._meta.get_field('username').max_length, 255,
+            msg='user.signals changed the max_length from 30 to 255')