A type of software testing that aims to verify that changes or enhancements to a software application have not adversely affected existing features or functionality, ensuring that previously developed and tested code continues to work as expected after modifications, updates, or fixes.

"After implementing a new feature, the team conducted regression testing to ensure that no existing functionality was broken by the changes."

A type of software testing to confirm that a recent program or code change has not adversely affected existing features.

"Regression testing is critical after making a minor change to the code to ensure that the software continues to perform correctly."