Pilot implementations are field tests of properly engineered, yet unfinished, systems. By exposing systems to their intended environment, pilot imple-mentations emphasize realism and collect real-use feedback for system fina-lization. While practitioners recognize pilot implementations as a means of testing the fit between a system and its use environment, pilot implementa-tions have received less attention from researchers in human-computer in-teraction. The workshop on pilot implementation for testing human-work in-teraction designs aimed to instill research interest in pilot implementation and to provide a forum for discussing and maturing such research. The seven workshop papers included in this post-proceedings volume span a variety of angles on pilot implementation. They contribute valuable insights but also leave open questions. Collectively, they provide illustrative case studies and inspiration for further research.