Integrity tests are used as a pre-employment screening technique by companies and organizations, and the fakability of such tests remain a concern. The present study used two separate designs to analyze the fakability of the Personnel Reaction Blank (PRB), a covert integrity test, and the personality constructs predictive of honest and fake scores. This study shows that the PRB can be successfully faked. The personality constructs conscientiousness, agreeableness, and neuroticism are significantly correlated with honest integrity test scores while conscientiousness and neuroticism are predictors of faking behavior. Finally, the type of design used to examine the fakability of the PRB affects the magnitude of faking found. I conclude by discussing the theoretical and practical uses of the results and directions for future research.