[tox]
envlist = py27,py36

[testenv]
# install pytest in the virtualenv where commands will be executed
deps = pytest-xdist
changedir=tests
commands= pytest --basetemp={envtmpdir}  \
                 --confcutdir=..         \
                 -n 3                    \
                 {posargs}

[tox]
envlist = py27,py36

[testenv]
# install pytest in the virtualenv where commands will be executed
deps = pytest
changedir=tests
commands= pytest --basetemp={envtmpdir}  \
                 --confcutdir=..         \
                 {posargs}

Remove `pytest-xdist` because there's only one test at the moment
Remove `pytest-xdist` because there's only one test at the moment
