City labs are a promising form of smart governance, providing a ‘smart interface’ between public and private actors, including citizens, through co-creation. Recent scholarship sees ‘experimentation’ - implementing projects with the goal to learn rather than to achieve a predetermined outcome – as a key feature of city labs and their contribution to the adaptability of an urban region. However, in practice, city lab practitioners struggle with this role and need guidance on how to set up, carry out and learn from experiments. TEK4Labs aims to enhance scientific understanding of the conditions required for city labs to take up their experimental role in governance successfully, as well as to provide practical guidance for city labs by developing an ‘experiment kit’. The project will take a transdisciplinary action research approach, combining literature review, survey and interview methods with co-creation design workshops and field testing involving city lab practitioners. TEK4Labs will be carried out by ICIS-UM researchers in collaboration with Stimuleringsfonds Creatieve Industrie and its network of Dutch city labs.