這是因為 在 v1.6 以上時 test runner 的方式已經改了, 詳看這裡
$ python manage.py check
System check identified some issues:
WARNINGS:
?: (1_6.W001) Some project unittests may not execute as expected.
HINT: Django 1.6 introduced a new default test runner. It looks like this project was generated using Django 1.5 or earlier. You should ensure your tests are all running & behaving as expected. See https://docs.djangoproject.com/en/dev/releases/1.6/#new-test-runner for more information.
System check identified 1 issue (0 silenced).
那麼這問題要怎麼解決呢?