py < 1.5.0; python_version < '2.7' or python_version == '3.3'
py ; python_version == '2.7' or python_version >= '3.4'
pytest < 3.3.0 ; python_version < '2.7' or python_version == '3.3'
pytest ; python_version == '2.7' or python_version >= '3.4'
pytest-cov
pytest-mock
pytest-env-info
unittest2
