Yes, it is possible to make simple mistakes in software testing. Common mistakes include not testing for all possible scenarios, not testing for edge cases, not testing for compatibility with other software, not testing for security vulnerabilities, and not testing for performance. Additionally, not having a clear set of test objectives and not having a comprehensive test plan can lead to mistakes. Finally, not having a good understanding of the software and its requirements can lead to mistakes in software testing.

What to do about it?

To avoid making mistakes in software testing, it is important to have a clear set of test objectives and a comprehensive test plan. Additionally, it is important to have a good understanding of the software and its requirements before beginning testing. It is also important to test for all possible scenarios, edge cases, compatibility with other software, security vulnerabilities, and performance. Finally, it is important to use automated testing tools to help ensure that all tests are completed accurately and efficiently.

By following these tips, it is possible to reduce the chances of making mistakes in software testing.