> For the complete documentation index, see [llms.txt](https://googlepay.airvend.ng/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://googlepay.airvend.ng/integration-steps/step-3-testing.md).

# Step 3: Testing

* Perform comprehensive testing to ensure that the integration works smoothly in both sandbox and production environments.
* Test various scenarios, including successful transactions, declined payments, and error handling.
* Use the Google Pay™ testing tools and resources to validate the integration.