mock-django test failure 1

gistfile1.txt

py26-1.5 inst-nodeps: /Users/jveatch/Downloads/mock-django-master/.tox/dist/mock-django-0.6.5.zip
py26-1.5 runtests: commands[0] | /Users/jveatch/Downloads/mock-django-master/.tox/py26-1.5/bin/python runtests.py
E
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ERROR: Failure: TypeError (Error when calling the metaclass bases
    __init__() keywords must be strings)
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Traceback (most recent call last):
  File "/Users/jveatch/Downloads/mock-django-master/.tox/py26-1.5/lib/python2.6/site-packages/nose/loader.py", line 413, in loadTestsFromName
    addr.filename, addr.module)
  File "/Users/jveatch/Downloads/mock-django-master/.tox/py26-1.5/lib/python2.6/site-packages/nose/importer.py", line 47, in importFromPath
    return self.importFromDir(dir_path, fqname)
  File "/Users/jveatch/Downloads/mock-django-master/.tox/py26-1.5/lib/python2.6/site-packages/nose/importer.py", line 94, in importFromDir
    mod = load_module(part_fqname, fh, filename, desc)
  File "/Users/jveatch/Downloads/mock-django-master/mock_django/__init__.py", line 9, in <module>
    from .http import *
  File "/Users/jveatch/Downloads/mock-django-master/mock_django/http.py", line 9, in <module>
    from django.contrib.auth.models import AnonymousUser
  File "/Users/jveatch/Downloads/mock-django-master/.tox/py26-1.5/lib/python2.6/site-packages/django/contrib/auth/models.py", line 21, in <module>
    from django.contrib.contenttypes.models import ContentType
  File "/Users/jveatch/Downloads/mock-django-master/.tox/py26-1.5/lib/python2.6/site-packages/django/contrib/contenttypes/models.py", line 127, in <module>
    class ContentType(models.Model):
  File "/Users/jveatch/Downloads/mock-django-master/.tox/py26-1.5/lib/python2.6/site-packages/django/db/models/base.py", line 97, in __new__
    new_class.add_to_class('_meta', Options(meta, **kwargs))
TypeError: Error when calling the metaclass bases
    __init__() keywords must be strings