What is retesting vs regression testing?

Question

Accepted Answer

Retesting is testing the same functionality again after fixing the defects. Regression testing is testing the entire system after making changes.

Retesting is done to ensure that the defects have been fixed and the functionality is working as expected.
Regression testing is done to ensure that the changes made to the system have not affected the existing functionality.
Retesting is a subset of regression testing.
Regression testing is time-consuming and requires a comprehensive test suite.
Example: If a defect is found in the login functionality and is fixed, retesting is done to ensure that the login functionality is working as expected. Regression testing is done to ensure that the fix has not affected other functionalities of the system.

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