What is a key advantage of non-regression testing?

Non-regression testing is primarily focused on ensuring that new code changes do not adversely affect the existing functionality of an application. This type of testing is crucial in maintaining the integrity of the software as it evolves, especially when updates, patches, or enhancements are implemented.

By confirming that existing functionalities work as expected, non-regression testing provides assurance that new developments have not introduced defects into previously working parts of the system. This helps maintain the reliability and quality of the software, ensuring that users can depend on the application’s established features. The continuous verification through non-regression testing is particularly vital in the context of agile development environments where rapid changes are common.

While other options mention aspects that can be important in software development, they do not align with the primary purpose of non-regression testing. For instance, simplifying coding, preventing unauthorized access, or enhancing user experience, while all valuable outcomes of good software practices, do not directly relate to the fundamental role of non-regression testing in confirming the stability of existing features after changes have been made.