> 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. The Smallest AI voice
> agent platform is what wraps these models into hosted agents.

# 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

![Web call testing](https://fdr-prod-docs-files-public.s3.us-east-1.amazonaws.com/smallest-ai.docs.buildwithfern.com/8fabd262af95317e25fbb9c7dd1cdeeedf465c8eb4167b848ede6b2cdcadc479/products/atoms/pages/platform/building-agents/images/test-webcall.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6KXJSKKNFOCF7G4B%2F20260725%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260725T060119Z&X-Amz-Expires=604800&X-Amz-Signature=c276ba3bfc25fb307a867d6241db420ff2abc05f7ef733a0633e17a3bec79f1c&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)

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

Best for rapid testing during development.

#### Telephony Call

![Telephony testing](https://fdr-prod-docs-files-public.s3.us-east-1.amazonaws.com/smallest-ai.docs.buildwithfern.com/869d19486025eae5be10a7996220915edc13cc1dd13e75720e63274928b49915/products/atoms/pages/platform/building-agents/images/test-telephony.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6KXJSKKNFOCF7G4B%2F20260725%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260725T060119Z&X-Amz-Expires=604800&X-Amz-Signature=a3c4bbafd23d2e296bd042566035e1ee2541e3ec613b21a7a288c039587a117c&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)

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

Best for final validation before launch.

#### Chat

![Chat testing](https://fdr-prod-docs-files-public.s3.us-east-1.amazonaws.com/smallest-ai.docs.buildwithfern.com/10ce0a2bc02120cff61b92330bbd80965f80480976102059ee8187bec2d8f010/products/atoms/pages/platform/building-agents/images/test-chat.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6KXJSKKNFOCF7G4B%2F20260725%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260725T060119Z&X-Amz-Expires=604800&X-Amz-Signature=b6f720214ca294c7e930d6b5612e3466f7ec2088376ebfe89800daa2fe957bb2&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)

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

Best for testing branching and prompts quickly.

***

## Related

#### [Conversation Logs](/voice-agents/platform/create-agent/agent-settings/conversation-logs)

Review call transcripts