def METHOD_NAME(self):
    """Tests failed path based on missing port."""
    config["subsonic"]["url"] = "http://localhost/airsonic"
    responses.add(
        responses.GET,
        'http://localhost/airsonic/rest/startScan',
        status=200,
        body=self.SUCCESS_BODY
    )
    self.subsonicupdate.start_scan()