Translation testing methodology has been criticized for its subjective character. No real strides have so far been made in developing an objective translation test. In this paper, certain detailed procedures including various phases of pretesting have been performed to achieve objectivity and scorability in translation testing methodology. In validating the newly-developed objective translation test, the following research questions are asked: (1) What is the reliability of scores of the translation test and how does it compare with the criterion measure; (2) What is the concurrent validity of the test and of the criterion measure? and (3) Are there any factors such as underlying constructs that the translation test and each subtest of the criterion measure may assess? The following general hypothesis is proposed: in measuring the English proficiency of Iranian EST university learners, a translation test is as valid and reliable as a standardized objective test. Results showed significant reliability for the new test. Contains 10 references. (Author/JL)