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What is the Difference Between Retesting and Regression Testing?
Retesting and regression testing are two important types of software testing. While both aim to improve software quality, they serve different purposes in the development process. Knowing the difference between them helps testers choose the right approach at the right time. Below is a clear side-by-side comparison to help you understand both testing types better.
| Aspect | Retesting | Regression Testing |
|---|---|---|
| Purpose | To verify that a specific defect has been successfully fixed | To ensure that recent code changes haven’t broken existing functionality |
| Trigger Point | Performed after a bug is fixed | Performed after any code change (bug fix, update, or new feature) |
| Test Case Scope | Limited to previously failed test cases | Includes a wide range of previously passed test cases |
| Test Data | Uses the same data as the original failed test | May use existing data or updated data to test the overall system |
| Execution Type | Re-execution of failed test cases | Re-execution of passed test cases |
| Focus Area | Narrow focus on the bug-fix area | Broad focus across multiple features/modules |
| Test Coverage | Low – focuses on specific issue | High – ensures overall system stability |
| Dependency on Bug Fix | Yes – depends on the confirmation that a bug has been resolved | No – not dependent on bug fix confirmation |
| Automation Usage | Typically manual | Often automated to save time and effort |
| Example | If a login issue due to wrong password logic is fixed, retesting checks it | After adding a user profile feature, test login, settings, and navigation flows |
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