vitest‑puppeteer is a preset that integrates the head‑less browser automation library Puppeteer with the Vitest test runner. It supplies a ready‑made environment (global `page`, `browser`, etc.) and helpers (e.g., `expect‑puppeteer`, debugging utilities) so developers can write end‑to‑end UI tests for web applications using Vitest’s syntax. It’s aimed at front‑end engineers and CI pipelines that want lightweight, Jest‑compatible browser testing without leaving the Vitest ecosystem.