Self-report research indicates that dishonesty decreases across adulthood; however, behavioral measures of dishonesty have yet to be examined across younger and older adults. The present study examined younger and older adults' cheating behaviors in relation to their self-reported honesty-humility. Younger (N = 112) and older adults (N = 85) completed a matrix task where they had the opportunity to falsely inflate their performance. Participants also completed the self-report measure of honesty-humility from the HEXACO-PI-R. Older adults were significantly less likely to cheat and had higher ratings of honesty-humility compared to younger adults. Greater honesty-humility predicted lower cheating behavior. These results demonstrate that older adults show greater rates of honesty and humility compared to younger adults using both behavioral and self-report methods.