pytest migration: switch to pytest; remove nose support Make pytest the default test runner and remove support for nose. Tests can be run using: - py.test - python setup.py test The pytest configuration needs to move from setup.cfg to pytest.ini to support this - see https://github.com/pytest-dev/pytest/issues/567 and https://bitbucket.org/pytest-dev/pytest-runner/issues/7/support-all-pytest-commands .