[tox]
envlist = py26,py27,py33,py34,py35,py36,py37

[testenv]
deps =
    pytest
    unittest2
commands = pytest {posargs}

[tox]
envlist = py26,py27,py33,py34,py35,py36,py37

[testenv]
deps =
    pytest
    unittest2
    importlib
commands = pytest {posargs}

Add importlib as dep for py26
Add importlib as dep for py26
