# Testing
source: https://developer.mastercard.com/unified-installments/documentation/testing/index.md

This section explains different test cases to verify the positive and negative scenarios for the Mastercard Installments APIs.  
Click the Test Scenario of each API to uncover the API Behavior in different conditions.

|   Mastercard Installments API    |                                                                             Testing Details                                                                             |
|----------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Merchant Participation API       | [Test Scenarios](https://developer.mastercard.com/unified-installments/documentation/testing/merchant-participation-api/merchant-participation-api-positivesc/index.md) |
| Mastercard Installments Services | [Test Scenarios](https://developer.mastercard.com/unified-installments/documentation/testing/mastercard-installments-payment-services/index.md)                         |
| Installments Approval API        | [Test Scenarios](https://developer.mastercard.com/unified-installments/documentation/testing/installments-approval-api/index.md)                                        |
| PAN List API                     | [Test Scenarios](https://developer.mastercard.com/unified-installments/documentation/testing/pan-list-api/index.md)                                                     |