What is Re-Testing?

- Whenever the developer fixed a bug, tester will test the bug fix is called Re-testing.

- Tester close the bug if it worked otherwise re-open and send to developer.

- To ensure that the defects which were found & posted in the earlier build were fixed or not in the current build.

Example:- 

- Build 1.0 was released. Test team found some defects (defect id-1.0.1. 1.0.2)

- Build 1.1 was released, now testing the defects 1.0.1 and 1.0.2 in this build is re-testing.