# Testing the checkout

Once the April checkout has been fully integrated into your page, it’s important to test its functionality.

April will provide a set of test API keys beginning with `sandbox_` to test the integration.

### Plugins testing

Merchants using an April **[plugin integration](/developer-portal/checkout/plugins-intro)** can simply replace their normal API keys in
their plugin settings with the `sandbox_` keys and go to their checkout.

### Direct integration testing

In the web interface, merchants who have integrated using the **[direct API integration](/developer-portal/direct-integration-landing)**
can continue to load the checkout script from the production URL previously given in **[Step 2 of the checkout integration](/developer-portal/checkout-integration#step-2---displaying-the-april-checkout)** page. The checkout widget will communicate with the correct April environment based on the public key you provide.

REST calls made from the backend server will require the host to be updated to `api.sandbox.au.meetapril.io`. Be sure to use the test API keys.

Below is a guide to filling fields in a **test instalments payments plan**.

## Pre-generated testing inputs

The integration is now ready to be tested. Use the following inputs to test your new April checkout from the customer side.

### Test credit card numbers

Use any of the following cards to test you can successfully pay for orders.

| Card type | Test card number |
|  --- | --- |
| Visa credit | `4242424242424242` |
| Visa debit | `4000056655665556` |
| Mastercard credit | `5555555555554444` |
| Mastercard debit | `5200828282828210` |
| Mastercard prepaid | `5105105105105100` |
| American Express | `378282246310005` |


Use the following cards to test error scenarios. When used to pay for an order,
the call will fail with HTTP status code `400` and the given error code will be returned.
See [Handling errors](/developer-portal/error-handling) for more details on errors.

| Card type | Test card number | Error code |
|  --- | --- | --- |
| Visa debit | `4000000000009995` | `insufficient_funds` |
| Visa debit | `4000000000009987` | `lost_card` |
| Visa debit | `4000000000009979` | `stolen_card` |
| Visa debit | `4000000000000069` | `expired_card` |
| Visa debit | `4000000000000127` | `invalid_cvc` |
| Visa debit | `4100000000000019` | `fraudulent` |


Use the following card to test [3D-Secure](/developer-portal/three-d-secure) support

| Card type | Test card number | Behaviour |
|  --- | --- | --- |
| Visa debit | `4000002500003155` | Will trigger 3DS challenge |


### Set up a test instalments payments plan:

| Data field | Description |
|  --- | --- |
| Phone number | Any valid phone number |
| Email | Any valid email |
| Date of Birth | Any valid date more than 18 years ago |
| **Identity verification** |  |
| Given name | Any string |
| Middle name | **Important:** to pass the identity verification (sandbox only), enter `TWOPASS` in this field. |
| Family name | Any string |
| Australian residential address | Any valid Australian address |
| Driver's licence | Any string |
| Passport | Any string |


## Testing other processes

After creating a test transaction using the `sandbox_` API keys, it’s now possible to test other functions of the April checkout.
Access the **[Merchant dashboard](/developer-portal/merchant-dashboard)** to view your test payments, initiate a refund for a test payment,
and test the Virtual Terminal functionality (using the same test card information above).

Important
Remember to replace the `sandbox_` API keys with the normal keys after completing testing.

## Troubleshooting

If your direct API integration is not functioning as expected, please review the previous steps in the process:

- **[Checkout integration](/developer-portal/checkout-integration)**
- **[Payments](/developer-portal/payments)**
- **[Error handling](/developer-portal/error-handling)**


If you cannot identify the issue or are using a plugin integration, please contact April support.

## What's next?

Access and use the **[Merchant dashboard](/developer-portal/merchant-dashboard)**

br
br
**[Return to documentation home](/).**