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DevOps & Automation · Foundational

Regression Test

Re-running tests after a change to ensure previously working functionality still works.

Definition

Automated regression suites in CI catch unintended side effects. Every fixed bug should get a regression test so it cannot silently return.

Example

A bug fix for date parsing adds a test case reproducing the original failure.

Exam tip

Regression testing protects existing behavior; it is not about new features.

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