Nox is configured via a noxfile.py file in your project’s directory. Here’s a simple noxfile that runs lint and some tests: import nox @nox.session def tests(session): session.install('pytest') session.run('pytest') @nox.session def lint(session): session.install('flake8') session.run('flake8', '--import-order-style', 'google') For each session, Nox will automatically create a virtualenv with the