def METHOD_NAME(self) -> None:
    # Make sure we don't have pytest in sys.modules before we start.
    del sys.modules["pytest"]
    # Import pytest
    mod, has = import_third_party("pytest")
    assert has
    # Yes, it's really pytest:
    assert mod.__name__ == "pytest"
    print(dir(mod))
    assert all(hasattr(mod, name) for name in ["skip", "mark", "raises", "warns"])
    # But it's not in sys.modules:
    assert "pytest" not in sys.modules