The aim of the study is to investigate trends in academic L1 Swedish and L2 English reading comprehension ability among Swedish adolescents, with a specific focus on 18- to 20-year-olds in the period 2012-2018. The material consists of results from regular tests and anchor tests in the spring administrations of the Swedish Scholastic Assessment Test (SweSAT) 2012-2018, allowing an analysis of trends in reading comprehension ability among a subset of the adolescent population. The results show two highly significant but opposite trends, with a substantial decrease in academic Swedish reading comprehension and an equally substantial increase in academic English reading comprehension. The results are discussed from the perspective of a changing media landscape, and related to results of the PISA-studies as well as to research on extramural English in Swedish society.