CVV Test Mode: What It Means and How to Test Card Flows Safely
CVV test mode lets you run card checkout tests with fake card numbers and fake CVV values in a payment sandbox. Here is how it works and where it stops.
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Onyx Gift Cards is a Grenadian company designed to introduce, market and manage gift cards systems in Grenada for retailers and corporations. We are enthusiastic about the effect and influence we will have on the local market. We intend to expand our systems regionally with a range of product offerings and services.
Gift cards are the preferred way of giving and receiving gifts. They carry a monetary value that can be redeemed for gifts at your favorite store.
Onyx GiftCards are “Open Gift Cards” which means that they can be redeemed at multiple merchant locations. They are standard credit card size, can fit into the average wallet and made of PVC plastic. Onyx GiftCards are Barcoded for security and safety for the consumer and bear a disclaimer at the back.
Onyx Giftcards can be bought with a branded Card backer which is black in colour and is designed to fit the card. There is an area to write a brief message to the recipient as well.
Use 737 as the CVV for most Adyen test cards, and 7373 for American Express test cards, which carry a four digit code. These values only work in the Adyen test environment with test API keys, test client keys, and a test merchant account. A test CVV entered against a live account will always fail, and real card data must never be used for testing.
Adyen uses one shared CVC value across its published test cards, with a separate value for Amex because the field length differs.
Adyen's test card page lists additional brands such as Maestro, Discover, JCB, and UnionPay along with their matching codes. Always pull the current table before you build fixtures, because Adyen occasionally adds or retires test numbers.
Most failures come from the environment or the card pairing, not from the CVV itself.
Use the dedicated refusal test cards that Adyen documents for each error reason. Each of those card numbers maps to a specific refusal, so the CVV check is what triggers the response. Inventing a random card number returns a generic refusal and will not reproduce the exact error you want to test.
No. Test card numbers and their CVC values are rejected outside the test environment. Going live requires a real card issued to a real cardholder, plus a live API key and a live merchant account.
Use any cardholder name, a future expiry date, and the 3D Secure flow instructions listed next to each test card. Set the shopper country and currency to values your test merchant account supports, or the payment may be refused before the CVC check runs.
No. PCI DSS prohibits retaining the card verification code after authorization, even in encrypted form. Store a token from the Adyen tokenization service instead, and let the card scheme handle the verification step.