ModuleNotFoundError: No module named 'mysite.polls' in django tutorial while testing

I am coding along tutorial from django documentation site: https://docs.djangoproject.com/en/3.1/intro/tutorial05/

I got a following problem: While trying to run test on my app (with: py manage.py test polls in Pycharm commndline) i get following error:

> ImportError: Failed to import test module: mysite.polls Traceback
> (most recent call last):   File
> "C:\Users\micha\Anaconda3\envs\DjangoTutorial\lib\unittest\loader.py",
> line 470, in _find_test_path
>     package = self._get_module_from_name(name)   File "C:\Users\micha\Anaconda3\envs\DjangoTutorial\lib\unittest\loader.py",
> line 377, in _get_module_from_name
>     __import__(name) ModuleNotFoundError: No module named 'mysite.polls'

The file structre of my project is as follwoing: link to the directory tree img

It looks like testing unit automaticcaly adds 'mysite' in front of 'polls'

What i tried: I have tried to lookup for an answer in django test documentation. Only solution that i was able to find was to change command to like like this:

py manage.py test polls.tests

Then it runs my test properely.

As far as I understand django documentation, django should automatically find every 'test*' file in polls yet in case of mine it cannot find 'polls' module.

Can you tell me why it happens?