Minor changes can have huge consequences. As the wants and choices of customers and markets are dynamic, so is expected the software to progress in parallel with the varying trends. In a few cases, the changes or even slight modifications in the back-end can often cause a diversion from intended use and functionality. To evade such anomalies in software, the QA specialist team performs regression tests (with the assistance of regression test tools). 

Tester teams should make certain that fresh code doesn’t conflict with older code and that unchanged code continues to function as expected. Software products, once designed, are frequently changed to ensure the right incorporation of sophisticated and unique features. This form of testing makes certain that the app’s earlier functionality is still functional and that the latest alterations haven’t introduced new bugs. 

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