The next step is to choose your testing methods. Depending on your system type, size, and complexity, you may need to use different testing methods to cover different aspects of your system. Unit testing involves verifying the functionality and logic of individual components or units of your system and can be automated with tools like JUnit, NUnit, or PyTest. Integration testing checks how different components or units of your system work together and interact with each other and can be tested using Postman, SoapUI, or RestAssured. System testing tests the system as a whole to verify compliance with the requirements and specifications and can be done using Selenium, TestComplete, or Cypress. User acceptance testing tests the system with end-users or stakeholders to validate usability, functionality, and suitability for the intended purpose and can be done using UserTesting, UserZoom, or Userlytics to collect feedback.