Testing WorldPay (test card details)
If your WorldPay integration is set to "TEST" mode in the website manager, then you can test the WorldPay integration using test credit card numbers.
PLEASE NOTE THESE DETAILS WILL NOT WORK IF YOUR WORLDPAY IS SET IN LIVE MODE. IT WILL ONLY WORK WHEN WORLDPAY IS SET IN TEST MODE (REGARDLESS OF WHETHER YOUR WEBSITE IS LIVE)
To set whether your WorldPay integration is in TEST or LIVE mode, go to
your website manager, then go to "Settings", "Shop Settings" and then go
to the "Payment provider" tab
For details of test debit/credit card numbers, please see this article on WorldPay's website:-