freezegun
mock
pretend
pytest
pytest-cov
pytest-rerunfailures
pytest-timeout
pytest-xdist
scripttest
https://github.com/pypa/virtualenv/archive/master.zip#egg=virtualenv
# Revert the following hack after a PyYAML is released supporting Py3.7
pyyaml; python_version < "3.7"
https://github.com/yaml/pyyaml/archive/master.zip#egg=pyyaml ; python_version >= "3.7"