Запускаю тесты, программа просит сослаться на настройки и окружение, а что конкретно, понять не могу. Текст ошибки приложен ниже

test setup failed cls = <class 'store.tests.test_logic.LogicTestCase'>

@classmethod
def setUpClass(cls):

  super().setUpClass()

...(тут были ссылки на основной код Django)

self = <LazySettings [Unevaluated]>, name = 'DATABASES'

def _setup(self, name=None):
    """
    Load the settings module pointed to by the environment variable. This
    is used the first time settings are needed, if the user hasn't
    configured settings manually.
    """
    settings_module = os.environ.get(ENVIRONMENT_VARIABLE)
    if not settings_module:
        desc = ("setting %s" % name) if name else "settings"

      raise ImproperlyConfigured(

            "Requested %s, but settings are not configured. "
            "You must either define the environment variable %s "
            "or call settings.configure() before accessing settings."
            % (desc, ENVIRONMENT_VARIABLE)
        )

E django.core.exceptions.ImproperlyConfigured: Requested setting DATABASES, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.