Test credentials still do not work. I'll enable SEPA, but it'll be marked experimental so use at ones own risk. It's not really any different than credit cards payment method except it takes an account number so pretty confident it should work, but I can't guarantee functionality since I can't test it. I notified them about this 4 months ago and still doesn't seam fixed. Have contacted them again and will see what comes of it.
Also adding an API version selector for compatibility with the below API change requiring recurring subscription plans to also create products.
stripe.com/docs/upgrades#2018-02-05
#7045