def METHOD_NAME(self, rollback_registry):
    registry = rollback_registry
    Parameter = registry.System.Parameter
    query = Parameter.query().filter(Parameter.key == "test.parameter")
    if query.count():
        pytest.fail("key for test already existing")
    Parameter.set("test.parameter", True)
    assert query.count() == 1
    assert query.first().value == {"value": True}
    assert query.first().multi is False