The company Tietoevry in Karlstad uses regression testing when working with networks. When a test fails, manual modifications to a command in a text file must be done and a re-test must be performed by executing the command. The process of retesting is both time consuming and error prone. Furthermore, as the number of re-testing processes is constantly increasing, Tietoevry needs a graphical user interface (GUI) to help testers and facilitate the re-testing process. The project’s main aim was to create a GUI that makes re-testing processes less time consuming and less error prone. The project has resulted in a GUI that will serve as a valuable tool for testers. It allows them to conveniently alter commands without the need for manual modifications to text files. The GUI will significantly reduce the time required for the re-testing processes, while also reducing errors.