For the purpose of certification and oversight of various legislative areas (jurisdictions) a tool for automated play is needed to perform certain functional tests. Key tasks are measuring of mean game time, minimum game time and running of hourly tests. Design and implementation is bypassing the internal code of the slot machine. Result is achieved with a device called Jože, which interacts with gaming machine by switching relays. Jože is guided by a personal computer which is running code written in Python.