[tox]
envlist = py27, py35
[testenv]
deps =
    pytest
    mock
    PyYAML
    numpy
    pandas
    tables
    matplotlib
    dbg: pdbpp
commands =
    py.test []
setenv =
    MPLBACKEND = agg

[tox]
envlist = py27, py36

[testenv]
deps =
    pytest
    mock
    PyYAML
    numpy
    pandas
    tables
    matplotlib
    dbg: pdbpp
commands =
    py.test []
setenv =
    MPLBACKEND = agg

Change default envlist to py27,py36
Change default envlist to py27,py36
