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Regression testing checks after code changes whether previously working features were unintentionally broken. It focuses on repeatability, prioritization and automation of existing test suites.
Regression testing verifies that code changes did not reintroduce defects by re-running existing test suites and analyzing results across affected components. It focuses on detecting regressions after refactoring, bug fixes, dependency or configuration updates. Effective regression practice relies on risk-based prioritization, selective automation, robust test data and continuous maintenance to remain efficient.
Measures total execution time of the suite; important for feedback cycles.
Share of failed tests that are unstable on rerun.
Percentage of key business flows covered by regression tests.
Regression tests check after payment-flow changes that checkout, coupons and order confirmations still work.
Automated regressions validate that nightly or monthly batch runs produce consistent results after changes.
After a UI refactor, regression tests safeguard core user flows, navigation and state handling.
Identify critical paths and prioritize test cases.
Automate prioritized tests and integrate them into CI.
Establish maintenance processes and monitor test quality.