Minimum Competence Assessment resembling PISA and Characters Survey replace National Examination in 2021. However, the Indonesian students' score in PISA is still left behind the international average scores. This study aims to find out the extent of the relationship between science informative text and science fiction text skills in secondary school. This research is a quantitative correlational study carried out by distributing online tests of science informative texts and science fiction texts. The participants of this study were 133 students of grade ten at 4th Pematangsiantar Senior High School and they were selected using simple random sampling technique. A bivariate correlation test with the Pearson Product Moment method was implemented to analyze the data. The result found that the value of the correlation coefficient was 0.96 (r = 0.96) meaning that the alternative hypothesis is accepted. In other words, there is a very strong positive correlation between the students' reading skills in fiction text with the students' reading skills in informative text. In short, the result indicates that when the students' ability to read science fiction text increases, their ability to read science informative text will also increase.