Model Based Testing Workshop, organized by Alexander Petrenko (ISP RAS, Russia) in collaboration with Holger Schlingloff (Fraungofer FIRST, Germany) was held on March, 25 at the ETAPS 2012 conference in Tallinn. Ina Schieferdecker, Head of the Competence Center for Modeling and Testing (MOTION) at the Fraunhofer Institute for Open Communication Systems (FOKUS), Berlin made a presentation on the topic “Model-Based Security Testing”. From Software Engineering Department of ISP RAS Yevgeny Gerlits made a presentation about “Model-Based Testing of Safety Critical Real-Time Control Logic Software”.