Test runner wants to run models package?!

Hallöchen!

With Django 1.9.5 (rest are original Ubuntu 16.04 packages) and
Python 3.5.1, "manage.py test myapp" tries to run the *models*
package of myapp as a test module:

user@localhost:~/src/myproject/myproject$ ./manage.py test myapp --pattern=invalid_pattern
Creating test database for alias 'default'...
Destroying old test database for alias 'default'...
E
======================================================================
ERROR: myproject.myapp.models (unittest.loader._FailedTest)
----------------------------------------------------------------------
ImportError: Failed to import test module: myproject.myapp.models
Traceback (most recent call last):
File "/usr/lib/python3.5/unittest/loader.py", line 462, in _find_test_path
package = self._get_module_from_name(name)
File "/usr/lib/python3.5/unittest/loader.py", line 369, in _get_module_from_name
__import__(name)
File "/home/user/src/myproject/myproject/myapp/models/__init__.py", line 26, in <module>
from .physical_processes import *
File "/home/user/src/myproject/myproject/myapp/models/physical_processes.py", line 66, in <module>
class Substrate(PhysicalProcess):
File "/usr/local/lib/python3.5/dist-packages/django/db/models/base.py", line 102, in __new__
"INSTALLED_APPS." % (module, name)
RuntimeError: Model class myproject.myapp.models.physical_processes.Substrate doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.


----------------------------------------------------------------------
Ran 1 test in 0.000s

FAILED (errors=1)
Destroying test database for alias 'default'...



I chose "invalid_pattern" to limit it to the models package.
Without "--pattern", all *real* tests are run, too. Using Python2,
everything is fine. Does anybody have an idea what's going on here?

Tschö,
Torsten.

--
Torsten Bronger Jabber ID: torsten.bronger@jabber.rwth-aachen.de

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