title: Sagepay API - Simulate rejected payments?
body: <p>I'm testing an app which accepts payments through Sagepay.
  It all seems to be working OK but I would like to test various types of non-successful responses in the Sagepay sandbox.</p>
  
  <p>For example, each test I have done so far has returned a status of OK. It is also possible to receive statuses like REJECTED, NOTAUTHED, INVALID etc</p>
  
  <p>Is it possible to simulate these responses in some way?</p>
  
  <p>Entering incorrect details repeatedly just returns me to the failure URL I specify in the API settings.</p>