This thesis aimed to design and implement a physical testing robot to support mobile test automation. The robot was not meant to replace other automation tools but to assist in situ-ations where physical touch manipulation of the test device's touchscreen is required

The thesis provided an overview of mobile test automation and the tools used in the development of the testing robot and the test environment. The robot was implemented using a 3D printer, which was modified to be controlled from the test environment using established device control methods and G-code machine control language. A new Python library was created for the robot within the test environment, defining control methods that enabled its seamless integration into the testing environment.

The completed testing robot was tested by creating a mobile testing environment specifically designed to ensure all its functionalities. Four mobile devices were used as test devices, with the tested application installed on them. Twenty identical test cases were created in the test environment and randomly executed on each test device. The testing robot successfully completed all the login steps for each test case.

As a result, a functional physical testing robot was achieved, operating as intended as part of the mobile testing environment. Verification testing demonstrated the device's reliability, and the testing robot was immediately put into use as part of the testing environment for the company that had the initial need for it.