Regression Testing vs Retesting

Regression testing and retesting are two crucial concepts in software testing that are often used interchangeably but have distinct purposes and methods.

Regression Testing

Regression testing involves re-running test cases that have already been executed to ensure that any recent code changes have not adversely affected the existing functionality of the software. It aims to detect any new defects or regressions introduced due to code modifications.

Retesting

Retesting, on the other hand, focuses on testing the specific areas of the software that failed during the initial testing. It involves running test cases for the failed functionalities to verify whether the reported issues have been fixed after the bug resolution.

Key Differences

• Regression testing verifies the overall impact of code changes on existing functionalities, while retesting validates the specific fixes for reported issues.
• Regression testing is performed on unchanged functionalities as well, while retesting is limited to the areas identified as defective in the initial testing.

Both regression testing and retesting play vital roles in ensuring the quality and reliability of the software being tested. Understanding the differences between the two is essential for effective test planning and execution.