Explore the journey of transitioning from a legacy system to a modern C++ based medical device in this ACCU 2016 conference talk. Delve into the challenges faced by Felix Petriconi and his team as they develop a complex application for medical purposes. Learn about the technical hurdles, engineering education, and process investments made to improve quality. Discover the evolution of their test strategy, including the implementation of behavior-driven development using Cucumber, RSpec, and XMLRPC protocol. Gain insights into synchronous and asynchronous test functions, scoped test contexts, and the overall lessons learned from this transformative project. Understand the practical implications and benefits of quality improvements in medical device development.