Click on each button in sequence from top to bottom without refreshing the page.
Each button will bring up the Payment Request UI window.
When prompted, please enter addresses as follows...
"web platform test" as recipient, at address "1 wpt street" in "Kabul, Afghanistan", zip/postal code 1001.
Set the organization to "w3c". Set the phone number to "+93 55 555 5555"
If you find a buggy test, please file a bug
and tag one of the owners.