We studied how time measures can be used as predictors of test-taking performance in low-stakes tests. Our sample consisted of undergraduate students (N = 327) who took a computer-based cognitive abilities test. Our aim was to find how test-takers’ motivation manifests itself in test-taking effort. We found that a high test-taking speed is related to low test scores (the correlation between test score and Response Time Effort was r = .71). Also, the mean time for wrong answers per item was smaller than the time for right answers (mean effect size d = .22). We found that performance in low-stakes tests is influenced by two test-taking effort characteristics: the number of items the test-taker attempts to solve and the mean time that is devoted to solve an item (β = .4–.5).We suggest that test-taking motivation should be studied further as it may provide useful information for interpreting results of tests and examinations.