Teachers with so-called migration backgrounds are often assumed to possess higher intercultural competencies or skills for more adequately dealing with migration-related diversity than other teachers. However, these assumptions of higher intercultural competencies, specific pedagogical orientations and attitudes have rarely been systematically empirically examined. On the other hand, such a utilitarian ethnicization is increasingly criticized by migration researchers in educational science in Germany as furthering stigmatization and deprofessionalization. Against this background, our paper aims to contribute to the lively discourse about teacher with so-called migration backgrounds. We start with analysing teacher data from the German National Education Panel Study (NEPS). Our analyses indicate that teachers with and without so-called migration backgrounds do not differ significantly in most respects. These findings led us to methodological considerations with regard to the (non-)usefulness of the statistical category of 'migration background' in educational migration research.