Urs Bauman, a network automation practitioner and maintainer of the open-source Network Unit Testing System (NUTS), teams up with Marco Martinez, a Swisscom architect focused on network automation. They dive into the essence of unit testing for networks, emphasizing small, verifiable checks and the importance of pre- and post-change testing workflows. The duo introduces NUTS as a versatile testing tool leveraging YAML and pytest, making automation accessible. They also discuss community contributions, digital twins, and the seamless generation of YAML tests from source-of-truth.