TestNG vs JUnit: Which testing framework should you choose? Both TestNG and JUnit are popular test automation frameworks for Java, with a wide range of features that can be used to improve the efficiency of automated tests. However, when it comes to choosing between the two, several factors need to be considered. In this comparison, we will explore the key differences between TestNG and JUnit, including their annotation support, parallel execution capabilities, parameterization options, and more. We'll also discuss how each framework can be used with Selenium WebDriver for web automation testing. By understanding these differences, you can make an informed decision about which framework is best suited for your project's needs.