Vitest
MIT Vite-native unit/integration test runner
Libraries / Testing · OSS/MIT · 16k
What's Good
MIT. Jest-compatible API, Vite transform pipeline, watch mode, TypeScript/ESM first-class, browser mode options. Shares config/plugins with Vite. Fast feedback in Vite apps and libraries.
The Catch
Vs Vite: Vite-native test runner; not the bundler. Not full E2E browser suites. Closest when Vite is already the toolchain.
Verdict
MIT Vite test runner. Free forever; Vite itself is the bundler gem.
Embed
[](https://stackgems.com/gems/vitest)