What Is Regression Testing? Its Need And Uses


Regression Testing

Definition: – Regression testing is defined as a type of software testing to confirm that a recent program or code change has not harmfully affected existing features.

Regression Testing is Re-Testing to make sure that any modification done in a program will not affect the other functionality.

Regression testing is nothing but a full or partial selection of already executed test cases which are re-executed to ensure existing functionalities work fine.

We can do Regression Testing at all the level of testing like Unit Testing, Integration Testing and System Testing Level.

Need of Regression Testing

  1. Common code changed correctly or not.

  2. Correct or incorrect version control.

  3. Bug fixes perfectly.

  4. Bug fixes completely.

  5. Performance issue fix.

  6. Modification of requirement and code changes

  7. New feature is added to the software perfectly.



At least one complete regression test should be run before system deployment to production. Tests which are stable, repeated frequently, simple and require no tester input are a good candidate for automation Testing in regression testing.

Regression Testing Effective: –

  • wide and detailed enough to allow catching defects

  • eliminate duplicate test cases

  • merge test cases

  • automate tests as feasible

“Related post”

Software Development life cycle

Software Testing Life Cycle

Test Case Documentation

Alpha and Beta Testing

Regression Testing

Smoke and Sanity Testing

Software Testing

Validation and Verification


Entry and Exit Criteria in software testing

Integration Testing 

Automation Testing



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