The Conditional Reasoning Test for Aggression has shown significant correlations with various counterproductive work behaviors (CWBs) and seems to be potentially very useful for screening out applicants inclined to deviant behaviors at work. However, there is a lack of research testing its overlap with other personality determinants of CWBs. In this article, we report the results of three studies testing incremental validity of the Conditional Reasoning Test for Aggression (CRT‐A). Our results have shown that the CRT‐A was mostly unrelated to the Dark Triad traits (Study 1), the HEXACO traits (Study 2), or trait self‐control (Study 3). However, the CRT‐A score was still a significant predictor of CWBs‐related attitudes (Study 1) and self‐reported interpersonal and organizational deviance (Study 3).