[tox] envlist = py37, py38 [travis] python = 3.7: py37 3.8: py38 [testenv] setenv = PYTHONPATH = {toxinidir} deps = -r{toxinidir}/requirements_dev.txt ; If you want to make tox run the tests with the same versions, create a ; requirements.txt with the pinned versions and uncomment the following line: ; -r{toxinidir}/requirements.txt commands = pip install -U pip py.test --basetemp={envtmpdir}