Employment tests have long been scrutinized for psychometric considerations such as validity and reliability, but the extent to which cheating may occur on pre-employment tests has generally been overlooked. With the rise of unproctored, on-demand, online testing, the need has never been greater to focus on design and process considerations that can help mitigate the potential for cheating on employment tests. This paper builds on the limited existing research on the detection of inconsistent test scores on unproctored Internet testing. Job candidates (n = 4,026) completed a computer adaptive cognitive ability test under two conditions: an unproctored screening test followed by a proctored confirmation test. Analyses focused on detecting instances of inconsistent test scores based on comparison of standard errors of measure for the unproctored and proctored test scores (Guo and Drasgow, Int J Sel Assess 18:351-364, 2010). Results revealed a relatively low number of inconsistent scores and are discussed in the context of future research, application, and theory building on the nature of cheating on pre-employment tests.