https://www.infoq.com/news/2026/04/uber-junit4-junit5-migration/
Uber Migrates 75,000+ Test Classes from Junit 4 to Junit 5 Using Automated Code Transformation -...
Apr 27, 2026 - Uber engineers migrated over 75,000 test classes from JUnit 4 to JUnit 5 using automated code transformation with OpenRewrite and internal orchestration. By...
junit 4ubertestclassesusing