Test Automation
Jul 18, 2026
Scaling Selenium Suites Without Losing Sanity
Lessons from running thousands of Selenium tests per week — flakiness, parallelization, and cost.
Automation at scale is less about writing tests and more about running them reliably. In this post I share the patterns we adopted across enterprise clients to keep our Selenium suites fast, deterministic, and affordable.
1. Isolate the environment
Every flaky test I have ever debugged was caused by shared state. Treat your automation runs as ephemeral: fresh containers, fresh data, fresh browser profiles.
Tags
#selenium
#scale
#ci-cd