I'm developing an Android application in which I need to integrate PayPal into the buying part, I'm using the PayPal Sandbox to test, it seemed to be working perfectly. I create my personal account and the business account and the fakes transactions are working because I am checking the PayPal Developer website.
In developing the error-handling part the first error I intended to deal with was the issue of insufficient funds ... but the problem is that even my personal test account being with funds of $ 0.00 transactions < in> fakes continue to be confirmed and the money is passed on.
What can I do wrong or what can I do to simulate these errors on Android?