Overview
Protecting Existing Value
Regression testing is the most common use case for test automation. It provides a safety net that allows developers to move fast without breaking the product.
For a QA Manager, regression testing is about confidence. Without a robust regression suite, every deployment becomes a gamble. Automation is key here, as manual regression is time-consuming and prone to human fatigue.
Best Practices
Dos and Don'ts
Avoid common mistakes that can lead to flaky tests and maintenance nightmares.
What to do
- •Automate the 'Stable' features that are unlikely to change soon.
- •Categorize regression tests into 'Smoke' (critical) and 'Full' (exhaustive).
- •Regularly prune the regression suite to remove obsolete tests.
Common Pitfalls
- •Don't try to automate 100% of regression; focus on high-risk, high-frequency paths.
- •Don't ignore failures in the regression suite—they are your early warning signals.
The Details
Regression Strategy: Full vs. Selective
A mature QA strategy balances Full Regression (run before major releases) with Selective Regression (run on every commit). Selective regression uses Impact Analysis to execute only the tests related to the modified code. This reduces CI/CD wait times while still maintaining a high level of protection against side effects.