USDF Introductory Dressage Tests – current for the 2013 competition year. Suitable for USDF and Canadian Dressage riders. A useful reference for trainers, judges and spectators. Study USEF dressage tests with a more visual and auditory learning approach. Each test allows you to: Suitable for US Dressage riders. A useful reference for trainers, judges and spectators. Study USDF dressage tests with a more visual and auditory learning approach. Each test allows you to: