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👁️ the @vitest.dev addon for @storybook.js.org has almost 2 million weekly downloads and I'm only discovering it now? package: npmx.dev/package/@sto... docs: storybook.js.org/docs/writing...

Join the Vite ecosystem tomorrow to celebrate the Vite Team 5th Anniversary by rewatching together the Vite Documentary! Let's remember the stories of the people who connected to extend together our shared commons. And stay at 3:45 PM UTC to participate in the live stage after the movie 💜

This day 4 years ago I sent my first PR to @vitest.dev. Back then it was on v0.7.4 with 80K weekly downloads. After one year and +70 more PRs, @antfu.me and @erus.dev invited me to join the team. Today we are at v4.1.0 with 35M weekly downloads. Maybe in 2030 we'll have Vitest 8 with 140M downloads.

Debounces, delays, intervals... they either break your tests or slow them down. ⏩ Since @vitest.dev 4.1.0, you can now "fast-forward" time in your tests with `nextTimerAsync` tick mode. ❤️ credit goes to Andrew Scott (@angular.dev team) 🧑‍🍳 recipe → cookbook.marmicode.io/angular/test...

I just need a few more of you to migrate to @vitest.dev so I can prove that crystal balls work 🔮 😉 (the charts from npmx.dev are so neat ❤️)

Vite and Vitest have been a pleasure to use in my oss projects since switching to them. Kudos to those teams.

Async leak detection in action - caught a missing gcTime: Infinity in our TanStack Query test setup in one of our projects.

Announcing Vite+ Alpha. Now open source. To make JavaScript developers more productive than ever before. A single binary that: ◆ Unifies your frontend toolchain ◆ Manages your runtime & pkg manager ◆ Caching & monorepo support Works with every framework and meta framework in the Vite ecosystem.

Very excited about this update! Tons of new stuff coming 🎉

⚡️ Vite 8.0 is here! The most significant architectural change since Vite 2. ⏬ Powered by @rolldown.rs bringing faster production builds and more consistency 🛤️ New features such as tsconfig paths and emitDecoratorMetadata support vite.dev/blog/announc...

Vitest 4.1 is out! 🚀 ✅ Vite 8 support from day 1 🏷️ Test tags to organize, filter & apply shared options 🪝 New hooks for easier tracing, transactions and AsyncLocalStorage 🔍 Async leak detection 🤖 Agent reporter to reduce token usage And much more! Full blog post at vitest.dev/blog/vitest-...

We're joining with the Vite team to re-premiere our Vite documentary!⚡️ 📅 Happening 19th March at 4pm CET | 10am CST 📺 Screening on the Vite website 💬 Followed by a live stage on Discord with Vite devs from the film Come hang out!

@vitest.dev vscode extension now supports @deno.land!

Been recently really enjoying working with Vitest tbh (both for client’s design system and also for my personal projects). I’m just nerding out over the terminal colors at this point tho

🧪 In the latest release of @analogjs.org, you can migrate to @vitest.dev with browser mode for @playwright.dev enabled and automatically configured using an @angular.dev schematic! analogjs.org/docs/feature...

✨ What's New in ViteLand: February 2026 Recap ◆ Oxfmt Beta: 100% Prettier conformance ◆ @vite.dev 8 includes devtools ◆ @vitest.dev 4.1 beta adds aroundEach/aroundAll hooks ◆ @rolldown.rs becomes 9.6% faster ◆ Oxlint now supports 59/61 ts-eslint rules ◆ NestJS migrates to Vitest ◆ and much more 👀

4 new packages added to Awesome Vitest in the last 7 days: 1 reporter, 2 utilities, and 1 browser mode environment. The ecosystem keeps growing. Building tooling for @vitest.dev? PRs are welcome!

This is my favorite kind of changes. Experimental runners out, clarity in. @vitest.dev is the path. Thanks Alan! github.com/angular/angu...

I started a collection of resources for @vitest.dev + Svelte / SvelteKit testing. If you know a good learning resource (also Vitest in general), please let me know. fubits.dev/notes/2026-0...

The fact that Vitest can run 1k tests in just 164 ms is mind-blowing.

Flaky tests and memory leaks are the worst. @vitest.dev now has a flag that catches uncleared intervals, lingering servers, and other async operations leaking across your tests. Available in the latest 4.1 beta. Big shout out to @ariperkkio.dev from the Vitest team for landing this PR! 🔥

Vitest 4.1 is on the horizon, but we're already looking ahead! What are your main pain points in your testing workflow right now? Let us know in the Vitest 5 discussion thread!

In the next version of Vitest you can track leaking asynchronous resources via `--detect-async-leaks` option! Available in v4.1.0-beta.4 release. 🔍 (notice missing await in the example)

👋 @vitest.dev Browser Mode for #Angular is not just a switch — but a different recipe 😉 Let's dive into what's cooking under the hood: ⚙️ How it works (Vitest vs Playwright roles) 🌓 "Partial" vs. 🌕 "Full" Browser Mode 🔌 APIs: userEvent vs. page 🪜 Progressive migration youtu.be/Pu22JQG6jdg #testing

What stops you from using @vitest.dev browser mode? 👀

published a new version of the @vitest.dev ansi serializer! this basically converts many ansi codes to human-readable text for snapshots

🧪 Enjoyed the conversation between @manfredsteyer.bsky.social and @rainerhahnekamp.bsky.social about the future of testing with @angular.dev and @vitest.dev. I appreciate the recommendation of @analogjs.org for previous versions of Angular & compatibility with IDEs www.youtube.com/watch?v=1ac9...

This is huge news!! Super excited to be working with @ariperkkio.dev ❤️

Excited to announce that I've officially joined @chromatic.com! My main focus will be working around features related to @vitest.dev 🤝

🧪 `@nuxt/test-utils` v4 is out 🚀 👺 mocking is much more reliable ⚡ works with vitest v4 + Vite's native Module Runner ⚗️ registerEndpoint improvements much thanks to github.com/yamachi4416 and @adamdehaven.com ❤️ 👉 github.com/nuxt/test-u... let me know how it goes! 🙏

@vite.dev and @vitest.dev crushing the positive sentiment of devs who used it in the State of JS survey 🚀

For all your AsyncLocalStorage needs, Vitest 4.1 now supports `aroundEach` and `aroundAll` hooks! main.vitest.dev/api/hooks#ar...

✨ What's New in ViteLand: January 2026 Recap ◆ Unified redesign across all VoidZero sites ◆ @vite.dev crossed 3 billion npm downloads ◆ @rolldown.rs reached RC status ◆ Lazy Barrel Optimization landed in Rolldown ◆ Oxfmt hit 100% Prettier conformance ◆ ...and more 👀 voidzero.dev/posts/whats-...

The State of JS 2025 results are out! 🏆 Most Adopted Tech → Vitest 🏆 Highest Satisfaction → Vite (98%) & Vitest (97%) 🏆 Highest Interest → Vitest (83%) & Rolldown (80%) But that's not all! A thread 🧵

Every test suite eventually categorizes tests: "skip this in CI," "this one is flaky," "that one needs more time." and so on. Vitest 4.1 (in beta right now) introduces Test Tags: You can now define these categories globally, attach config or behavior and eventually filter what runs.

TIL about the .extend builder pattern to add context to test fixtures in @vitest.dev Seems super handy for backend testing (setting up servers, database, mocked services etc). And now with type safety? 😍

The next @vitest.dev version has a new `test.extend` syntax that supports type inference (including the correct scope)! main.vitest.dev/guide/test-c...

Use Vitest, but don't use Vite? Vitest 4.1 introduces a new flag to disable Vite module runner entirely, but keep using all the Vitest features you like! Try it out and let us know what you think:

Test tags are coming to Vitest 4.1 (beta)! And they are powerful 💪 main.vitest.dev/guide/test-t...

The first beta for @vitest.dev 4.1 is out! 🧪 ◆ Chai-style spy assertions (`toHaveBeenCalled`, etc.) ◆ `userEvent.wheel()` for browser mode ◆ Enhanced retry options ◆ Disposable returned from `doMock()` ◆ Coverage ignore start/stop hints ◆ and more 👀 Try now by installing vitest@beta

Did you know @vitest.dev has `expect.poll`? It reruns an assertion until it passes (or times out). You can configure how many times the `expect.poll` callback should run with custom interval and timeout options! No need wrapping everything in `vi.waitFor` More in the docs vitest.dev/api/expect.h...

New Year. New Look. Same Mission. Make JavaScript developers more productive than ever before

Want to understand why some of your @vitest.dev tests are slower than expected? Then you can use the built-in experimental @opentelemetry.io support to figure out what makes tests slow and how much time is spent on each part of it. 📈

A new milestone! @vitest.dev hit 20 million mark 🎉 Took us 4 years since the first closed 0.0.0 release on December 3d, 2021 😄

What's new in ViteLand? Our November 2025 recap is out! ✨ @vite.dev 8 Beta 👉 Oxfmt alpha 💻 @vitest.dev caching and imports breakdown ⚓️ Oxc becoming even faster!? 🎙 Updates from the Community 👀 and more voidzero.dev/posts/whats-...

Vitest 4.0.15 comes with a cool experimental feature: Imports Breakdown. Every module shows how long it took to load in UI and in the VSCode extension! Pass down `--experimental.printImportBreakdown` to also see it in your terminal. vitest.dev/guide/ui.htm...

Merged! Vitest 4.0.14 includes a new tabbed view and slider for visual regression reports 🎉 This feature required a lot of work under the hood, including the creation of the new test artifacts API. Really curious to see how it'll be used by us and the ecosystem 👀

Vitest 4.0.11 adds an experimental `fsModuleCache` flag to cache module transforms between reruns. Learn more: vitest.dev/config/exper... This is an opt-in feature, please let us know how it works for you! And example of a single test file that imports a lot of files (~1500). Almost a 50% boost!

Storybook v10 is looking amazing 🤩 The new CSF, the deeper Vitest integration, so many DX wins! @storybook.js.org @vitest.dev @yannbf.bsky.social youtu.be/YNQ_cJ6yy2Q?...