As part of a test validation study at a major U.S.-based airline, the authors tested the effects of providing an “at work” frame-of-reference on the validity of the NEO Five-Factor Inventory among a sample of customer service supervisors (N =206). Frame-of-reference moderated the validity of the Extraversion and Openness to Experience subscales after controlling for cognitive ability. In addition, the frame-of- reference personality test showed incremental validity over cognitive ability (delta = R.16), but the standard personality test did not (delta = R.05). The authors’ discussion focuses on implications for personality theory and research and on implications for increasing the validity of personality tests in organizational settings.