As a hybrid vehicle, the train's electrical performance had to be rigorously tested during its development.
In early 2020, once initial testing had been performed in the Netherlands, the testing process moved to a test ring in Germany where Ricardo's rolling stock team oversaw a comprehensive range of tests that both they and Stadler had spent many months preparing for, including brake tests, commissioning tests and verification of the automatic train protection system.
In June 2020, after the successful conclusion of the second test stage, and following the award of an intermediate certification status, the trainsets returned to the Netherlands to commence track testing the Dutch network, a stage also overseen by the Ricardo team.