What is difference between Re-testing & Regression testing?

Re- test - Retesting means we testing only the certain part of an application again and not considering how it will effect in the other part or in the whole application.

Regression Testing - Testing the application after a change in a module or part of the application for testing that is the code change will affect rest of the application.




Re-Test
You have tested an application or a product by executing a test case. The end result deviates from the expected result and is notified as a defect. Developer fixes the defect. The tester executes the same test case that had originally identified the defect to ensure that the defect is rectified.

Regression Test
Developer fixes the defect. Tester re-test the application to ensure that the defect is rectified. He also identifies a set of test cases whose test scenario sorrounds the defect to ensure that the functionality of the application remains stable even after addressing the defect.
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