Abstract: The current paper served as an attempt to shed light on two points. First, is there any difference in the performance of language testees on contextualized and de-contextualized vocabulary tests? Second, the study tried to examine gender differences in performing contextualized and de-contextualized vocabulary tests. To achieve the intended purposes, two versions of a vocabulary test, a contextualized and a de-contextualized one, were distributed among 72 Persian EFL language learners. Having run descriptive statistics and also independent t-test, the results revealed that first; language testees outperformed the contextualized vocabulary test than de-contextualized version. Second, though not significantly, females' performance was better than males' ones. Consideration of studies like the present one can be helpful in selecting the most effective strategies for assessing vocabulary aspect of language and as a result, causing a higher degree of performance in this area of language.