Vitest Browser Mode CI Bug Reproduction

This repository reproduces an intermittent bug in Vitest browser mode where tests randomly fail in CI with:

Error: Vitest failed to find the current suite. This is a bug in Vitest.

Issue

vitest-dev/vitest#9635

Reproduction Steps

1. Fork this repository
2. Push a commit to trigger CI
3. Observe that some test runs may fail with the error above
4. Re-run the failed job - it will likely pass

Environment

• Vitest: 4.0.8
• @vitest/browser: 4.0.8
• Playwright: latest
• Node: 20.x
• OS: Ubuntu (GitHub Actions)

Behavior

• ✅ Tests pass locally
• ❌ Tests randomly fail in CI (approximately 1 in 5 runs)
• ✅ Re-running CI fixes the issue

Notes

The workflow runs tests 5 times in parallel to increase the likelihood of reproducing the race condition.