The five tests are usually known as "Trial of Skill", the "Trial of Courage", the "Trial of the Flesh", the "Trial of Spirit", and the "Trial of Insight (or Knowledge)". In "Return of the Jedi", Master Yoda gives his apprentice, Luke Skywalker, the trial of confronting Darth Vader for a second time so he might become a full-fledged Knight. Occasionally, performing an extraordinary (usually heroic) act can earn a Padawan learner Jedi status, such as when Obi-Wan Kenobi defeats the Sith Lord, Darth Maul. By the time of the Skywalker Saga films, distinct "battle classes" were not necessary as the Republic had not seen war in over a thousand years, and the title of Knight was simply a rank once again.