Vitest Browser Mode + Wallaby.js Issue #3282

This repository is a minimal reproducible example for investigating wallabyjs/public#3282.

Issue Description

A customer reported that browser mode tests fail with Wallaby.js:

src/components/FormFields.test.tsx: vitest/browser can be imported only inside the Browser Mode. 
Your test is running in forks pool. Make sure your regular tests are excluded from the 
"test.include" glob pattern.

Current Status

We cannot reproduce the issue with this sample repo. The vitest configuration matches the customer's setup with:

• Split projects (unit and browser)
• Mutually exclusive include/exclude globs
• Browser mode using @vitest/browser-playwright

Project Structure

src/
├── components/     # Browser mode tests (uses @vitest/browser-playwright)
│   ├── Button.test.tsx
│   └── Input.test.tsx
├── hooks/          # Unit tests (node environment)
│   └── useCounter.test.tsx
└── utils/          # Unit tests (node environment)
    └── math.test.tsx

Vitest Configuration

The config uses vitest projects with:

• unit project: Runs tests in src/hooks/ and src/utils/ with node environment
• browser project: Runs tests in src/components/ with playwright browser

Running Tests

# Install dependencies
npm install

# Run all tests
npm test

# Run only unit tests
npm run test:unit

# Run only browser tests
npm run test:browser