machine:
    services:
        - docker

dependencies:
    # Without overriding, Circle CI infers that it should run `python setup.py
    # install` on the host, which we don't want (instead we run all our tests
    # in Docker containers).
    #
    # Overriding with an empty list or list with an empty string doesn't seem
    # to work, so we use a little hackery.
    override:
        - /bin/true

test:
    override:
        - CI/circle:
            parallel: true