> 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

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## 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%2F20260811%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260811T114857Z&X-Amz-Expires=604800&X-Amz-Signature=f62325248eff3a45d6a88afe486640aecbb830cdd4fb075e0c0910c1851d6066&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%2F20260811%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260811T114857Z&X-Amz-Expires=604800&X-Amz-Signature=f472e1b80e33ab502a75a31fd5ee1defac14303307199f15c4a4f32748e8ee5a&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%2F20260811%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260811T114857Z&X-Amz-Expires=604800&X-Amz-Signature=dc3e3823d88ceb61edd9518f36a83c5741cdc5a5a9befe429ce9db2bfbb03b5b&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.

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## Related

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

Review call transcripts