> ## Documentation Index
> Fetch the complete documentation index at: https://primer.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

## Test your entire payment flow

Use Primer’s testing tools to simulate real payment scenarios and validate your setup before going live.

![Test your entire payment flow](https://goat-assets.production.core.primer.io/marketing/external-docs/overview-pages/testing/banner/light.png)

![Primer Sandbox Processor](https://goat-assets.production.core.primer.io/marketing/external-docs/overview-pages/testing/primer-sandbox-processor.png)

## [Primer Sandbox Processor](https://primer.io/docs/testing/primer-sandbox-processor.md)

Simulate and validate payment workflows with the Primer Sandbox Processor.

## Test cases

> [card] [Testing 3D Secure](https://primer.io/docs/testing/3d-secure.md)
>
> Verify 3D Secure authentication flows and edge cases in sandbox mode.

> [card] [Testing Fallbacks](https://primer.io/docs/testing/fallbacks.md)
>
> Test fallback scenarios when primary authentication methods are unavailable.

> [card] [Testing Fraud Checks](https://primer.io/docs/testing/fraud-checks.md)
>
> Ensure fraud detection rules and risk checks trigger correctly in sandbox.

> [card] [Testing Network Tokens](https://primer.io/docs/testing/network-tokenization.md)
>
> Validate network tokenization behaviors and token lifecycle events.


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