def METHOD_NAME(self) -> None:
    with open("test.conf", "w") as testconfig_handle:
        testconfig_handle.write("[mirror]\ntimeout=999\n")
    instance = BandersnatchConfig()
    instance.config_file = "test.conf"
    instance.load_configuration()
    self.assertEqual(int(instance.config["mirror"]["timeout"]), 999)