Regression issues mean new code changes accidentally break something that was working before.
In very simple terms
- You fix or add one thing, and another existing feature stops working.
- That unexpected break is a regression.
Simple example
- Login feature is working fine
- A developer adds a new password reset feature
- After the change, users can no longer log in
👉 The login problem is a regression issue
Why regression issues happen?
- Code changes affect shared logic
- Dependencies are modified
- Configuration changes impact existing behavior
- Bugs are introduced during refactoring
How regression issues are detected?
Through automated regression testing, which:
- Re-runs existing tests after every code change
- Confirms old features still work
- Runs automatically in CI pipelines
Role in DevOps and CI
In Continuous Integration:
- Every code change triggers automated tests
- Regression tests catch issues early
- Problems are found before reaching production
This saves time, money, and outages.
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