bun-types/docs/guides/test/watch-mode.mdx

Type definitions and documentation for Bun, an incredibly fast JavaScript runtime

---
title: Run tests in watch mode with Bun
sidebarTitle: Watch mode
mode: center
---

Use the `--watch` flag to run your tests in watch mode.

```sh terminal icon="terminal"
bun test --watch
```

---

This will restart the running Bun process whenever a file change is detected. It's fast. In this example, the editor is configured to save the file on every keystroke.

<Frame>
  ![Running tests in watch mode in
  Bun](https://github.com/oven-sh/bun/assets/3084745/dc49a36e-ba82-416f-b960-1c883a924248)
</Frame>

---

See [Docs > Test Runner](/docs/test) for complete documentation on the test runner.