./runtests.py --settings=test_sqlite
Testing against Django installed in '/Users/oinopion/Devel/django/django'
Creating test database for alias 'default'...
Traceback (most recent call last):
  File "./runtests.py", line 373, in <module>
    options.failfast, args)
  File "./runtests.py", line 215, in django_tests
    test_labels or get_installed(), extra_tests=extra_tests)
  File "/Users/oinopion/Devel/django/django/test/runner.py", line 147, in run_tests
    old_config = self.setup_databases()
  File "/Users/oinopion/Devel/django/django/test/runner.py", line 109, in setup_databases
    return setup_databases(self.verbosity, self.interactive, **kwargs)
  File "/Users/oinopion/Devel/django/django/test/runner.py", line 297, in setup_databases
    verbosity, autoclobber=not interactive)
  File "/Users/oinopion/Devel/django/django/db/backends/creation.py", line 366, in create_test_db
    test_database=True)
  File "/Users/oinopion/Devel/django/django/core/management/__init__.py", line 167, in call_command
    return klass.execute(*args, **defaults)
  File "/Users/oinopion/Devel/django/django/core/management/base.py", line 336, in execute
    self.check()
  File "/Users/oinopion/Devel/django/django/core/management/base.py", line 413, in check
    raise CommandError(msg)
django.core.management.base.CommandError: System check identified some issues:

ERRORS:
auth.User.groups: (fields.E304) Reverse accessor for 'User.groups' clashes with reverse accessor for 'EmailUser.groups'.
	HINT: Add or change a related_name argument to the definition for 'User.groups' or 'EmailUser.groups'.
auth.User.user_permissions: (fields.E304) Reverse accessor for 'User.user_permissions' clashes with reverse accessor for 'EmailUser.user_permissions'.
	HINT: Add or change a related_name argument to the definition for 'User.user_permissions' or 'EmailUser.user_permissions'.
auth_email.EmailUser.groups: (fields.E304) Reverse accessor for 'EmailUser.groups' clashes with reverse accessor for 'User.groups'.
	HINT: Add or change a related_name argument to the definition for 'EmailUser.groups' or 'User.groups'.
auth_email.EmailUser.user_permissions: (fields.E304) Reverse accessor for 'EmailUser.user_permissions' clashes with reverse accessor for 'User.user_permissions'.
	HINT: Add or change a related_name argument to the definition for 'EmailUser.user_permissions' or 'User.user_permissions'.