Test payment requests are a great way to get a better understanding of how generating a payment request works. It's also great to see what your customers/clients will receive and the steps they follow to set up their payment.
A test request will not withdraw any money from the credit card/bank account you attach to it.
If you send a test request to a client they will not be able to make a payment using that request so it's important you do not send these to your clients.
Lastly you cannot change a test request to a live request after it has been sent.
The process is exactly the same as sending a regular payment request, however in the 9th step, ensure you toggle the "Live Request" button to "No" in order to make it a test request.
Click here to learn how to send a payment request (both live and test).