The minority question has long been a hot topic in Central and Eastern Europe. Whereas most CEE countries guarantee the privileged position of the dominant nation, they also recognize the existence of national minorities and provide special rights for them. Hence there is an apparent contradiction between the values of the nation-states: unity and diversity. This article proposes that to resolve this contradiction, it is necessary to define the concept, scope and limitations of group-specific minority rights, as well as their relationship with other human rights and the nation-state. Constitutional courts are appropriate candidates for this task. However, based on our analysis of the relevant constitutional jurisprudence of five CEE countries – Croatia, Hungary, Romania, Serbia, and Slovenia – it seems that constitutional courts in the region have failed to properly conceptualize minority rights. Instead of developing appropriate tests for assessing the constitutionality of legal regulations, they have only superficially touched upon the conceptual issues of minority rights, using incidental, case-by-case arguments to justify the (un)constitutionality of the legal provisions. Therefore, this article also attempts to outline a constitutionality test that may be suitable for constitutional courts to consistently evaluate submissions that challenge the constitutionality of laws on minority rights.