Why `vitest --changed` misses some tests (and how runtime coverage fixes it)

📰 Dev.to · Kazutaka Sugiyama

Learn how to optimize test runs with vitest --changed and runtime coverage to reduce unnecessary testing and improve CI efficiency

intermediate Published 18 Jun 2026
Action Steps
  1. Run vitest --changed to identify changed tests
  2. Configure runtime coverage to track code execution
  3. Analyze coverage reports to identify untested code
  4. Apply runtime coverage to fix missed tests
  5. Test the optimized test suite with vitest --changed
Who Needs to Know This

Developers and DevOps teams can benefit from this knowledge to streamline their testing processes and reduce build times

Key Insight

💡 Runtime coverage can help fix missed tests when using vitest --changed

Share This
🚀 Optimize test runs with vitest --changed and runtime coverage! 🚀

Key Takeaways

Learn how to optimize test runs with vitest --changed and runtime coverage to reduce unnecessary testing and improve CI efficiency

Read full article → ← Back to Reads

Related Videos

How to Code with Distrobox on the Steam Deck
How to Code with Distrobox on the Steam Deck
Ian Wootten
Can You Code on a Steam Deck?
Can You Code on a Steam Deck?
Ian Wootten
AWS, Azure, GCP: The One Thing Every Business Gets Wrong
AWS, Azure, GCP: The One Thing Every Business Gets Wrong
AI Daily
Containers on Amazon ECS with Mama J
Containers on Amazon ECS with Mama J
AWS Developers
How to Open QTR Files (QuickTime Movie)
How to Open QTR Files (QuickTime Movie)
File Extension Geeks
Improving DevOps Security and Efficiency at Cathay with AWS ProServe | Amazon Web Services
Improving DevOps Security and Efficiency at Cathay with AWS ProServe | Amazon Web Services
Amazon Web Services