And yes, having a 24 hour test window (though honestly, it is really going to be an outage) is a bit abusive to customers, particularly since we ere given less than a weeks notice, and I still have no actual test endpoint today that will not accept HMAC-SHA1 to validate my new code with, so it is beyond frustrating. At the very least, why not have a non-prod test window that precedes the production test window, to give companies time to test their code and prepare?