Vitest Best Practices

Comprehensive performance optimization and best practices guide for Vitest testing framework. Contains 44 rules across 8 categories, prioritized by impact to guide test writing, refactoring, and code review.

When to Apply

Reference these guidelines when:

• Writing new Vitest tests
• Debugging flaky or slow tests
• Setting up test configuration
• Reviewing test code in PRs
• Migrating from Jest to Vitest
• Optimizing CI/CD test performance

Rule Categories by Priority