TypeScript Native
Write tests in TypeScript with zero config. esbuild-powered transforms handle compilation automatically.
UNRIFT
A lightweight, fast TypeScript test framework with ESM-first design.
ESM-First
Built for modern JavaScript with native ESM support. CJS fallback included for compatibility.
Familiar API
describe, it, expect — the API you already know from Jest and Vitest. Minimal learning curve.
Extensible
Add custom matchers with expect.extend(). Full TypeScript support with declaration merging.