I'm trying to run tests on Braintree transaction refunding, but I'm running into a problem. Braintree's API only allows you to issue refunds for transactions that have settled. However, transactions created in the sandbox environment only "settle" once every 24 hours. So, when I try to refund them in the test suite, the refunds are always rejected because the original transaction is "submitted_for_settlement" and not "settled".
Any way around this?