Many tests designed to detect malingered performance during a neuropsychological examination rely on an assumption of intact memory inthe patient. Thus such tests may prove less useful in the presence of bona fide memory impairment. Wernicke-Korsakoff Syndrome (WKS)patients present an ideal opportunity to study such tests, as virtually all other cognitive functions aside from memory are intact in such individuals. A case history of a young woman with WKS and her performance on a neuropsychological battery including several tests of malingering are presented. Her performance on these measures is discussed in terms of the validity of the tests for measuring malingering in a patient with genuine cognitive dysfunction and no deliberate wish to feign deficits.