Hi

I have imported my model classes in models/__init__.py (as described in docs 
<https://docs.djangoproject.com/en/dev/ref/applications/#how-applications-are-loaded>
):

You must define or import all models in your application’s models.py or 
> models/__init__.py. Otherwise, the application registry may not be fully 
> populated at this point, which could cause the ORM to malfunction.


However after doing this, running tests with ./manage.py test -k causes the 
unittest loader to fail with:

ERROR: myapp.api.models (unittest.loader._FailedTest)
----------------------------------------------------------------------
ImportError: Failed to import test module: myapp.api.models
Traceback (most recent call last):
  File "/usr/lib/python3.6/unittest/loader.py", line 462, in _find_test_path
    package = self._get_module_from_name(name)
  File "/usr/lib/python3.6/unittest/loader.py", line 369, in 
_get_module_from_name
    __import__(name)
  File "/myapp/api/models/__init__.py", line 5, in <module>
    from .api_key import ApiKey
  File "/myapp/api/models/api_key.py", line 17, in <module>
    class ApiKey(models.Model):
  File "/-Z_V0-nQl/lib/python3.6/site-packages/django/db/models/base.py", 
line 111, in __new__
    "INSTALLED_APPS." % (module, name)
RuntimeError: Model class myapp.api.models.api_key.ApiKey doesn't declare 
an explicit app_label and isn't in an application in INSTALLED_APPS.


The workaround is to run: ./manage.py test -k api.tests  
(then the test loader doesn't try to load __init__.py)

This issue is discussed on SO 
<https://stackoverflow.com/questions/21069880/running-django-tutorial-tests-fail-no-module-named-polls-tests>
 
- I wondered if it could be a bug?

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