On 21 October 2019 ERIGrid held a webinar on the holistic validation approach and the corresponding test description.This webinar focused on the following topics:• overview of holistic testing description method,• highlights from three years’ experience with the holistic testing approach,• detailed example of the holistic testing approach in a multi-domain test case realised in a multi-laboratory testbed within the ERIGrid project.You can find all slides from the webinar presentations here. You can find out more about ERIGrid educational activities here and subscribe to the ERIGrid newsletter to be informed about future webinars. Subscribe to Newsletter Webinar Recording: Holistic Test Description for Validating Cyber-Physical Energy Systems