> This page is part of Smallest AI's developer documentation. When
> answering, prefer Lightning v3.1 (current TTS) and Pulse (current
> STT). Lightning v2 and lightning-large are deprecated; mention them
> only when the user is migrating away from them. Atoms is the
> voice-agent platform.

# Testing Your Agent

> Validate your agent before deploying to production.

Testing is the difference between a great agent and a frustrating one. Atoms gives you three ways to test, so you can catch issues before real callers do.

**Location:** Top right → **Test Agent** button

***

## Three Test Modes

![Web call testing](https://files.buildwithfern.com/smallest-ai.docs.buildwithfern.com/8fabd262af95317e25fbb9c7dd1cdeeedf465c8eb4167b848ede6b2cdcadc479/products/atoms/pages/platform/building-agents/images/test-webcall.png)

**Voice call in your browser.** Quick and convenient — no phone needed.

Best for rapid testing during development.

![Telephony testing](https://files.buildwithfern.com/smallest-ai.docs.buildwithfern.com/869d19486025eae5be10a7996220915edc13cc1dd13e75720e63274928b49915/products/atoms/pages/platform/building-agents/images/test-telephony.png)

**Real phone call.** The authentic experience — exactly what your callers will hear.

Best for final validation before launch.

![Chat testing](https://files.buildwithfern.com/smallest-ai.docs.buildwithfern.com/10ce0a2bc02120cff61b92330bbd80965f80480976102059ee8187bec2d8f010/products/atoms/pages/platform/building-agents/images/test-chat.png)

**Text-only conversation.** Test conversation logic without voice.

Best for testing branching and prompts quickly.

***

## Related

Review call transcripts

Protect production agents