---
title: Vitest UI | Guide
---

# Vitest UI

Powered by Vite, Vitest also has a dev server under the hood when running the tests. This allows Vitest to provide a beautiful UI to view and interact with your tests. The Vitest UI is optional, so you'll need to install it with:

```bash
npm i -D @vitest/ui
```

Then you can start the tests with UI by passing the `--ui` flag:

```bash
vitest --ui
```

Then you can visit the Vitest UI at <a href="http://localhost:51204/__vitest__/">`http://localhost:51204/__vitest__/`</a>


<img alt="Vitest UI" img-light src="https://user-images.githubusercontent.com/11247099/171992267-5cae2fa0-b927-400a-8eb1-da776974cb61.png">
<img alt="Vitest UI" img-dark src="https://user-images.githubusercontent.com/11247099/171992272-7c6057e2-80c3-4b17-a7b6-0ac28e5a5e0b.png">