Many students experience math anxiety, which can negatively affect their academic achievement and even their career choices. One of the most commonly used methods to assess math anxiety is the Abbreviated Math Anxiety Scale (AMAS). Despite the ubiquity of this measure, there is a lack of studies assessing its validity. Moreover, almost all studies have administered the AMAS to a predominantly (>75%) White sample. The present study assessed the validity of the AMAS in a largely underrepresented minority-student (Hispanics and Blacks) sample. The construct validity of the scale was established by showing that students' AMAS was predictive of both their actual (objective) and predicted (subjective) performance on an arithmetic task. The factor structure of the measure was validated by confirming that the two-factor model was a better fit than the one-factor model. Gender invariance was supported using multi-group confirmatory factor analyses. Overall, the results of the present study provide further evidence on the validity of the AMAS and its use among underrepresented minority college students.