Following the successful IEEE 5G Roadmap Workshop at ICC, the IEEE 5G and Beyond Initiative will be holding a Testbed Workshop focusing on experimental testbeds on 5G and Beyond. This workshop will take place, as part of the 2017 VTC, on Sunday September, 24th 2017 in Toronto. The objective of this workshop is to bring together developers, practitioners, technical experts and researchers to share experiences and advance the state of the art in all aspects of 5G systems prototyping, evaluation and testing. The workshop also aims to solicit contributions and promote discussion on the novel methodological studies and experimental paradigms for future 5G testbeds and co-development and co-deployment of experimental platforms. Of particular interest are ideas on extending publicly available testbeds with 5G related technologies as they become available and how they can be used to address common technological and scientific problems that are related to advanced wireless systems.