[tox]
envlist =
    py27,py35,py36,py37,py38,py39,
    flake

[testenv]
deps=pytest
commands=pytest

[testenv:flake8]
basepython=python
extras=lint
deps=flake8
commands=flake8 {toxinidir}

[tox]
envlist =
    py27,py35,py36,py37,py38,py39,
    flake

[testenv]
deps=pytest
commands=pytest

[testenv:flake8]
basepython=python
deps=flake8
commands=flake8 {toxinidir}

Remove extras setting from flake8 env
Remove extras setting from flake8 env
