[tox]
envlist = py3{5,6,7}

[testenv]
deps =
    mutagen
    pytest
commands = py.test

[testenv:py37]
deps = coverage
commands = coverage run setup.py test

[tox]
envlist = py3{6,7,8,9}

[testenv]
deps =
    mutagen
    pytest
commands = py.test

[testenv:py39]
deps = coverage
commands = coverage run setup.py test

Fix TOX configuration to test Python 3.6 up to Python 3.9.
Fix TOX configuration to test Python 3.6 up to Python 3.9.
