Digital transformations within educational systems are recurrently justified by their promise to enhance learning activities and outcomes. We examine this claim in a study of pupils' perception and experiences with computer-based adaptive tests in higher classes in Danish public primary schools. The study relies on survey and interview data and addresses whether pupils perceive their participation in computer-based adaptive tests as contributing to their learning and the degree to which the perception of teachers' attitude to the test influences their learning. A majority perceives their learning as low or non-existing. However, the perception of a more positive teacher attitude is related to more substantial learning. Theoretically, we attribute this relationship to the effect of self-fulfilling prophecies in the classroom. Learning also differs for subgroups related to gender and ability level. The findings contribute to discussions about educational policy, management, and the digital transformation of educational systems.