This documentation covers Vitest v3 (old version). For the latest version, see https://vitest.dev.

VitestNext Generation Testing Framework

A Vite-native testing framework. It's fast!

Vite Powered

Reuse Vite's config and plugins - consistent across your app and tests. But it's not required to use Vitest!

Jest Compatible

Expect, snapshot, coverage, and more - migrating from Jest is straightforward.

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Smart & instant watch mode

Only rerun the related changes, just like HMR for tests!

ESM, TypeScript, JSX

Out-of-box ESM, TypeScript and JSX support powered by esbuild.