Steps to reproduce:
1. Add a track to your cart and checkout at https://one.ubuntu.com/music-store
2. Select to pay with American Express, enter all the details, including the 4-digit validation code into the "Validation number" field
Result: Invalid card details
Expected result: Payment goes through
Steps to reproduce:
1. Add a track to your cart and checkout at https:/ /one.ubuntu. com/music- store
2. Select to pay with American Express, enter all the details, including the 4-digit validation code into the "Validation number" field
Result: Invalid card details
Expected result: Payment goes through