AI agents are the systems that simulate human behaviors to conduct testing activities such as test generation, test execution, defect detection, and analysis. The agents can analyze big amount of data, learn pattern, and adapt to requirements. This make them valuable to deliver high-quality products. The main application of AI agents are as follows: 1- Test automation 2- Defect prediction and detection 3- Visual testing 4- Performance testing 5- Adaption to the changes 6- Risk-based testing