def tox_addoption(parser):
    """Add arguments and needed monkeypatches."""
    parser.add_argument(
        '--travis-after', dest='travis_after', action='store_true',
        help='Exit successfully after all Travis jobs complete successfully.')

    if 'TRAVIS' in os.environ:
        pypy_version_monkeypatch()
        subcommand_test_monkeypatch(tox_subcommand_test_post)
Add arguments and needed monkeypatches.