As written by jason meridth: $ tox -e py35 — project/tests/test_file.py::TestClassName::test_method But the fine grain is mentioned by beluga.me in the comments: If you have a tox.ini file you might need to add the {posargs} to pytest in tox.ini: [tox] envlist = py35 [testenv] deps = pytest pytest-cov pytest-pep8 commands = pip install -e . … Read more
I’ve achieved this by committing a slight abuse of extra requirements. You were almost there trying the extras syntax, just that tests_require deps aren’t automatically available that way. With a setup.py like this: from setuptools import setup test_deps = [ ‘coverage’, ‘pytest’, ] extras = { ‘test’: test_deps, } setup( # Other metadata… tests_require=test_deps, extras_require=extras, … Read more
Instead of using the pytest-cov plugin, use coverage to run pytest: coverage run -m pytest …. That way, coverage will be started before pytest.
deps = -r{toxinidir}/tools/pip-requires -r{toxinidir}/tools/test-requires
After digging inside the source code, I found a scarcely documented option in tox.ini that skips sdist: [tox] skipsdist = BOOL # defaults to false Setting this to True I got what I wanted, saving me the effort of writing a meaningful setup.py