Designing a Zero-Flakiness Test Scheduler at Scale

Flakiness in automated testing suites is rarely a tool issue; it is almost always an isolation and state management issue. When scaling parallel UI/API execution beyond hundreds of concurrent threads, default test runners start hitting shared resource locks.

The Core Problem: Shared State Contention

When running end-to-end tests against microservice backend architectures, tests frequently collide on shared database entities or external identity providers…