Several PRs point to Vitest as Angular’s next test runner. But what does the team say officially? Mark Thompson clarifies.
🧪 Future Testing Frameworks
The testing tooling situation in Angular is up for a change. This isn’t totally new. Back in Angular 16, the team introduced an experimental Jest mode - intended to be the alternative to Jasmine & Karma.
Additionally, because Karma is deprecated, the plan has long been to replace it (or at least shift) with Web Test Runner or similar.
That was the state in 2023, and it’s mostly the same as of Angular 20 (2025). The official tooling is still Jasmine & Karma. But the team is now looking at Vitest as another potential possibility — rather than Jest as previously communicated.
Last week, a PR landed for migrating from Jasmine to Vitest, and it got merged. After that, many similar PRs followed.
So it looks like Vitest is gaining support - but we are missing an official statement.
ng-news reached out to Mark Thompson from the Angular and asked for an official statement. Here is his answer.
“the only context that we can provide is that the team has been in meaningful discussions to move towards a final decision, but this should not be seen as our final choice at this time.”
By the way - this is about the official Angular tooling support. Nx, an alternative to the Angular CLI, has offered support for Vitest and Jest for a long time.
GitHub Commit along short explanation: https://github.com/angular/angular-cli/commit/58474ec7dd85fc34639c138d9b8d545affb50e3e
🧠 Playwright E2E & AI Agents
Playwright, the most used E2E framework, released version 1.56. With it came upgrades in AI-assisted testing.
The release introduces three agents: planner, generator, and healer.
- Planner explores the app and builds a test plan.
- Generator turns that plan into test files.
- Healer runs the tests and tries to repair failures automatically.
This is a big step toward reducing manual effort in E2E test suites.
If you want more, check Debbie O’Brien’s video or the Playwright release notes.
📚 Community Content
Milosz Rutkowski from House of Angular published a detailed guide: "Angular SSR – everything you need to know".
He walks through when SSR is useful (SEO, initial load) and covers rendering modes, hydration, and even Analog.js.
https://angular.love/angular-ssr-everything-you-need-to-know
Also, Julian Jandl wrote a follow-up about LCP (Largest Contentful Paint) with practical tips.
LCP Optimization in Practice (Part 2) | Core Web Vitals
Hands-on guide to measuring and improving LCP using CrUX and Chrome DevTools—preload, srcset, code splitting, and deferring 3rd-party scripts.
push-based.io