As is shown in Harry Potter and the Prisoner of Azkaban, Hermione's Boggart takes the form of Professor McGonagall telling her that she has failed all her examinations. When Professor Lupin sets up the final test for the third year, he keeps the Boggart as one of his final questions, and Hermione comes out crying and narrates the story of her Boggart turning into McGonagall claiming that she failed all her exams.