[tox]
isolated_build = true
envlist = py36, py37, py38, flake8, black
[testenv]
deps = pytest
commands = pytest {posargs}
[testenv:flake8]
deps =
flake8
hacking
skip_install = true
commands = flake8
[testenv:black]
deps = black
skip_install = true
commands = black . --check