Release testing instructions for WC Payments 3.1.0

Test Currency switcher shouldn't affect Order confirmation screen prices

Currency switcher shouldn't affect screen prices on My account -> Orders -> View order and Order received pages.

Ensure you have three currencies: EUR, USD, and JPY.
Go to the store, switch the currency to Euro and buy some product.
On the order received page, try switching the currency to USD and JPY. Order price format (short and explicit) should not change.
Go to My account -> Orders. Select the order and click to go to the view order page.
On the view order page, try switching the currency to USD and JPY. Price format (short and explicit) should not change at the order details section.

I am able to successfully change a subscription's payment method via My Account when UPE is enabled.

As a Merchant, ensure UPE checkout is enabled via WCPay Dev and the WooCommerce Subscriptions plugin is installed.
As a Shopper, purchase any subscription product.
Navigate to My account → Subscriptions and open the newly created subscription entry.
Observe 3 buttons for “Actions”. Click “Change payment” button.
In the second block, select “Use a new payment method” option.
Provide 5555555555554444 as the test card number, future expiration date, and a CVC code.
Click the “Change payment method” button.
Ensure the payment method is updated successfully.