Equating of tests composed of both discrete and passage-based items using the nonequivalent groups with anchor test (NEAT) design is popular in practice. This study investigated the impact of discrete anchor items and passage-based anchor items on observed score equating via simulation. Results suggested that an anchor with a larger proportion of passage-based items and/or a larger degree of local dependence among passage-based items produces larger equating errors, especially when group ability differences are not minimal. Our findings challenge the common belief that an anchor should be a miniature version of the tests to be equated.