This paper describes the case study of a system testing for DIVERCITY. DIVERCITY was an EU funded project undertaken by a European consortium of researchers and practitioners from the construction industry. They were working together in an attempt to develop VR based software that enables the industry to better undertake the client briefing, design review, and construction planning phases of a construction project. The project had the acronym DIVERCITY – ‘Distributed Virtual Workspace for Enhancing Communication within the Construction Industry. DIVERCITY’s development and testing teams spread across four EU countries. That added an additional layer of complexity to the system testing. DIVERCITY used conformance approach for testing strategy to meet the user requirements of the system. This paper describes the methods used, and the lessons learned in the DIVERCITY project.