tox==1.8.1
pytest-django==2.8.0
pytest==2.6.4
pytest-xdist==1.11
pytest-cov==1.8.1

tox==1.8.1
pytest-django==2.8.0
pytest==2.6.4
pytest-cov==1.8.1
mock==1.0.1

Remove xdist and add mock.
Remove xdist and add mock.
