为管理员运行Django测试时出错

Question

根据the docs，我可以像这样运行django.contrib.admin的测试

# from django/tests
./runtests.py --settings=test_sqlite django.contrib.admin

然而，当我这样做时，我收到了这个错误：

  Traceback (most recent call last):
  File "./runtests.py", line 337, in <module>
    options.failfast, args)
  File "./runtests.py", line 180, in django_tests
    failures = test_runner.run_tests(test_labels, extra_tests=extra_tests)
  File "/Users/joshuafialkoff/.virtualenvs/bankr-env/src/django/django/test/simple.py", line 369, in run_tests
    suite = self.build_suite(test_labels, extra_tests)
  File "/Users/joshuafialkoff/.virtualenvs/bankr-env/src/django/django/test/simple.py", line 254, in build_suite
    suite.addTest(build_test(label))
  File "/Users/joshuafialkoff/.virtualenvs/bankr-env/src/django/django/test/simple.py", line 102, in build_test
    app_module = get_app(parts[0])
  File "/Users/joshuafialkoff/.virtualenvs/bankr-env/src/django/django/db/models/loading.py", line 160, in get_app
    raise ImproperlyConfigured("App with label %s could not be found" % app_label)
django.core.exceptions.ImproperlyConfigured: App with label django could not be found

与此同时，如果我跑：

./runtests.py --settings=test_sqlite

测试开始运行 - 但我不想运行整个套件。我是从repo标签1.5.2运行的。我如何为管理员运行测试？