Does Methadone test positive for Opiates?

Is there anyway possible? I have seen alot of people say no, you can only test positive for Methadone with a Methadone specific test. so there's no way possible? i get drug tested by my probation officer and they have the three panel basic drug test. opi/thc/coc. i tested positive for opiates. theres no way possible that is the methadone? please someone give me hope!

: http://alcoholdrugstreatment.info/does-methadone-test-positive-for-opiates