hatch test coverage includes test files

[kfir-drivenets]

Currently hatch includes the files under the tests directory in the coverage result as well.
I don't see any added value for that, is it possible to remove all the files under the tests directory from the results?

From the README:

$ git clone https://github.com/ofek/privy && cd privy
$ hatch test -c
========================= test session starts ==========================
platform linux -- Python 3.5.2, pytest-3.2.1, py-1.4.34, pluggy-0.4.0
rootdir: /home/ofek/privy, inifile:
plugins: xdist-1.20.0, mock-1.6.2, httpbin-0.0.7, forked-0.2, cov-2.5.1
collected 10 items

tests/test_privy.py ..........

====================== 10 passed in 4.34 seconds =======================

Tests completed, checking coverage...

Name                  Stmts   Miss Branch BrPart  Cover   Missing
-----------------------------------------------------------------
privy/__init__.py         1      0      0      0   100%
privy/core.py            30      0      0      0   100%
privy/utils.py           13      0      4      0   100%
tests/__init__.py         0      0      0      0   100%
tests/test_privy.py      57      0      0      0   100%
-----------------------------------------------------------------
TOTAL                   101      0      4      0   100%

[ofek]

You could use the -ca/--cov-args but that's a bad idea pyca/pynacl#290