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Model-based development is a well-established and widely used technique to design and implement systems by specifying the overall architecture of a system and its behavior directly in modeling tools such as PTC Integrity Modeler, Enterprise Architect, Modelio, or Papyrus/Eclipse. The next step forward in this process is using the same framework also for the design and specification of the tests for these systems. Verified Systems International GmbH offers with RT-Tester MBT a novel approach to model-based embedded systems testing, which we are going to present in this paper. Model-based testing (MBT) offers automated generation of test cases, test data and test procedures for model-in-the-loop, hardware-in-the-loop and system testing from UML/SysML models describing the intended system behavior [17,20].