Testing Declined Transaction Not Working

[antmar03]

I've been following the Test Guide, and I am entering zip codes that should trigger a declined transaction.

However, when I enter these zip codes the transaction still approves. Also, on the guide it says: 

Your sandbox should always be set to Live Mode. Transactions submitted in test mode are not stored and will return a transaction ID of zero.

Does this mean I need to be in live mode for further testing? I'm not looking to process transactions yet as I'm in testing phase. Or does sandbox simulate live mode?

[antmar03 · Accepted solution]

The issue was that I was in test mode. I confused the sandbox integration with how Stripe works. Stripe live mode actually means live mode, while live mode in sandbox is just for testing.

[suryavanshi]

How do we actually test the credit card even the failed credit card are accepting in the test mode and live mode i need to test the failed transaction or charge a credit card in which a transaction would fail but i'm unable to test it out does anyone know about how can i do it.