Recent studies suggest that testing on prior material enhances subsequent learning of new material. Although such forward testing effect has received extensive empirical support, it is not yet clear how testing facilitates subsequent learning. One possible explanation suggests that interim testing informs learners about the format of an upcoming test and consequently allows them to adopt study strategies in accordance with the anticipated test format. Three experiments investigated whether the beneficial effects of testing are due to learners' expectation with the test format or due to testing experience itself in inductive learning by varying when and how learners were informed about the format of an upcoming test. The results showed that informing learners about the test format via an interim test, but not a pretest, enhanced subsequent learning (experiment 1), and it was effective only when combined with actual test-taking experience (experiment 2). Testing appeared to enhance subsequent learning of new material when learners had an opportunity to evaluate their mastery over previously studied information. Experiment 3 further showed that these beneficial effects of testing were yielded even in the absence of feedback. Taken together, the findings suggest that mere exposure to the test format, not combined with actual testing, is not sufficient to enhance subsequent learning.