Is there a way to test the subscriptions API without incurring a charge?

How do we develop against the https://graph.oculus.com/application/subscriptions api endpoint and make sure it's working, without charging $$? It seems that even if you cancel a monthly subscription it's still good for the month. Other similar APIs we've used before allow for a test account of some sort, or putting a test credit card number on an account sort of thing.