[tox] envlist = py{27,36}-{fs,nofs} [testenv] basepython = # we use TOXPYTHON env variable to specify the location of Appveyor Python py27: {env:TOXPYTHON:python2.7} py35: {env:TOXPYTHON:python3.5} py36: {env:TOXPYTHON:python3.6} deps = pytest -rrequirements.txt fs: fs==2.0.4 commands = # run the test suite against the package installed inside tox env. # any extra positional arguments after `tox -- ...` are passed on to pytest pytest {posargs:--pyargs ufoLib}