Systems | Development | Analytics | API | Testing

Automated regression testing is no longer just about rerunning test cases after every change. In modern systems, it’s about ensuring that rapid releases, distributed architectures, and constant updates don’t silently break existing functionality. As teams move faster, the real challenge is not running more tests, but running the right ones efficiently.

Once the immediate crisis has passed, the focus shifts from firefighting to reflection.

When we talk to testing teams at enterprise organizations, we hear the same frustrations repeatedly: “Our automation breaks every time the UI changes.” “We can’t test this application because it doesn’t expose accessible properties.” “We spend more time maintaining tests than creating new ones.” These scenarios block test automation adoption for teams that need it most.

Robust test automation in Katalon Studio starts with stable test objects. Flaky tests almost always trace back to one root cause: brittle locators that break the moment the UI changes. The best approach is to use unique, static attributes like id or custom data-qa attributes. When those aren't available, CSS and XPath are your tools. This post covers how to write each type of selector, when to choose one over the other, and how to handle dynamic attributes using contains() and starts-with(). At a glance.

If you run a software engineering tools team, you have almost certainly had this conversation: a developer asks for production data access to debug a real incident, and someone in the room says no. Not because the request is unreasonable (it isn’t), but because nobody wants to be the person who said yes when something goes wrong. That instinct is understandable. Production environments carry real risk. But the reflex to lock everything down has a cost that rarely gets accounted for.

API traffic replay testing is a method of capturing real application traffic across protocols — HTTP, gRPC, database queries, message queues, and more — from a production environment and replaying it against a staging, QA, or development environment to validate software behavior under realistic conditions. In modern systems, HTTP is critical, but it is only one part of the picture.