def METHOD_NAME() -> None:
    class FromInitFixtureConfig(BaseConfig):
        found: str
        override: str
    with mock.patch.dict(environ, {"LIBRETIME_OVERRIDE": "changed"}):
        config = FromInitFixtureConfig(
            found="changed",
            override="invalid",
        )
    assert config.found == "changed"
    assert config.override == "changed"