A compensatory testing system exists in the first year of the Psychology bachelor at the Erasmus University Rotterdam, the Netherlands. Hereby, students are allowed to compensate, within certain boundaries, a failing grade of one course with a passing grade on another course. In contrast, students in a conjunctive testing system are required to pass each individual course. In this study a comparison is made between the validity of the two testing systems as a decision-making tool for deciding whether students are allowed to progress to their second year of the bachelor. Based on the observed scores of students a realistic distribution of true scores for eight tests is inferred. From this distribution, test scores are drawn as well as retake scores. Subsequently, it is calculated whether a student would pass the first year given a compensatory or conjunctive testing system. Finally, the sensitivity and specificity of these two testing systems is compared.