When developing SO mechanisms, mapping requirements to actual designs and implementations demands a lot of expertise. Among other things, it is important to define the right degree of freedom for the system that allows for self-organization. Back-to-back testing supports this hard engineering task by an adequate testing method helping to reveal failures in this design and implementation procedure. Within this paper we propose a model-based approach for back-to-back testing. The approach is built on top of the S# framework and integrated into the Visual Studio development environment, enabling the creation of executable test models with comprehensive tooling support for model debugging. By applying the concepts to a self-organizing production cell, we show how it is used to fully automatically reveal faults of a SO mechanism.