In an increasingly globalized world, the call for internationally comparable competence measurements has emerged. After several international studies on pre-college education, the focus has shifted to international assessments of vocational education and training (VET). VET researchers in Germany developed a computer-based test (ALUSIM) that measures the competence of German apprentices in internationally defined core commercial areas. Our own study deals with the adaptation of this test to Switzerland and a discussion of the challenges involved, with the aim of providing guidance for future adaptations. More specifically, despite commonalities between the German and Swiss VET systems, it is necessary to examine whether the contents and technical aspects of ALUSIM are appropriate for Swiss conditions in order to ensure validity and evidence based on test content.