In this article, we explore scientists' freedom of expression in the context of authoritarian populism. Our particular case for this analysis is Finland, where the right-wing populist Finns Party entered the government for the first time in 2015. More recently, after leaving the government in 2017, the party has been the most popular party in opinion polls in 2021. We illustrate the current threats to Finnish researchers' freedom of expression using their responses on three surveys, made in 2015, 2017 and 2019. We focus on politically motivated disparagement of scientists and experts, and the scientists' experiences with online hate and aggressive feedback. Further, we relate these findings to the recent studies on authoritarian populism and science-related populism. We argue that this development may affect researchers' readiness to communicate their research and expertise in public.