Shopify/active_merchant — pull request #757 by radar (2013-07-11 05:40:36+00:00)
Title: Use USAEpay's Sandbox during testing

When the USAEPay transaction gateway is set to "test", it should use the Sandbox. The Advanced gateway is configured to do this, but it appears the Transaction gateway was overlooked... That's alright, that's what pull requests are for!

Thank you wonderful people for dealing with payment gateways :)