Follow this procedure to initiate a test payment:
- Register at https://developer.paypal.com/ for a "Sandbox Test Environment" additionally to your PayPal business account.
- After you registered successfully you may create a new test account (buyer) within your "sandbox". This buyer test account will be used for your test payment.
- Ensure you are logged into your "Sandbox Test Environment" before initiating a test payment.
- Then initiate a payment transaction using your E-Commerce application (e.g. your shop). Please pay attention to use value "test" for parameter "mode" (mode=test). Use the buyer test account credentials as a customer in your webshop to start payment.