def METHOD_NAME(config):
    config.addinivalue_line("markers",
        "valgrind_error: Tests that are known to error under valgrind.")
    config.addinivalue_line("markers",
        "leaks_references: Tests that are known to leak references.")
    config.addinivalue_line("markers",
        "slow: Tests that are very slow.")
    config.addinivalue_line("markers",
        "slow_pypy: Tests that are very slow on pypy.")