How to test url in django

I would like to test my url in django but I got error message.

here are my codes:

urls.py

url(r'^create/(?P<userName>[0-9a-zA-Z-]+)/$', views.create, name='create'),

test.py

from django.test import TestCase, Client

client = Client()


def test_create(self):
    """Test the url for "create"
    """

    response = self.client.get('/mission/create/' + str(self.userName))
    self.assertEqual(response.status_code, 200)

and i would get this result:

FAIL: test_create (mission.tests.MissionUrlTests)
Test the url for "create"
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/actinbox/mission/tests.py", line 122, in test_create
    self.assertEqual(response.status_code, 200)
AssertionError: 301 != 200

Please help me with my codes here. Thank you in advance.