Avionics ground systems and HMI tools use many screens and buttons. People use these every day to set things up, watch system status, and check results. Testing these screens by hand takes time. It also gets boring when the same steps must be repeated and again. Over time, small mistakes can happen. This white paper talks about using Selenium to help automate GUI testing in a simple and controlled way.

The focus here is only on ground software, not flight software. This includes ground stations and HMI applications. The paper explains where Selenium helps and where it should not be used. Selenium does not change code or generate new code. It is not used to certify airborne software. Its job is simple. It runs repeatable UI tests and saves the results so engineers can review them later.

Some people worry that automation reduces trust in testing. This paper shows that it does not. When used with clear rules and checks, automation can make testing more stable. The same steps run the same way each time. This reduces human mistakes and makes it easier to compare results. The paper also talks about handling changing UI elements and keeping test runs predictable.

Tool qualification under DO-330 is also discussed. It explains how Selenium is reviewed and what kind of proof or records are needed. Keeping clear links between requirements, test cases, and results is an important part of the process.