Multiple choice technology testing The difference between re-testing and regression testing is re-testing is running a test again; regression testing looks for unexpected side re-testing looks for unexpected side effects; regression testing is repeating re-testing is done after faults are fixed; regression testing is done earlier re-testing uses different environments, regression testing uses the same Reveal answer Fill a bubble to check yourself A Correct answer Explanation Re-testing focuses on running the exact same tests to verify that a specific defect has been fixed. Regression testing ensures that changes or fixes have not introduced new side effects or broken unmodified parts of the system.