This article presents the psychometric qualifications of a new video-based measure of school professionals' ethical sensitivity toward issues of racial intolerance in schools. The new scale, titled the Quick-Racial and Ethical Sensitivity Test (Quick-REST) is based on the ethical principles commonly shared by school-based professional organisations and James Rest's model of moral decision making. The validation of the measure is established through two separate studies: one conducted with 238 school professionals, including teachers, administrators, psychologists, coaches and others who work in diverse schools; and the other conducted with 57 student teachers. The results, with regard to the internal reliability of the items and convergent and overall construct validity, showed that the Quick-REST is a psychometrically sound measure of school professionals' ability to recognise violations of ethical principles as depicted in two five-minute videotapes illustrating instances of racial intolerance in schools. There was no evidence of bias due to social desirability. Areas of use for the Quick-REST in teacher education and ways to improve the scale are discussed. (Contains 1 table.)