The purpose of this study was to examine the reliability and validity of a basal reading series mastery test. Subjects were 21 fourth graders, who were tested once on the SRA Reading Achievement Test, twice on the Holt Basic Reading Series Management Program Level 13 Test (MPLT), and once on the Word Reading Test. Traditional psychometric correlational analyses were applied to the data to investigate the following dimensions of the technical adequacy of the MPLT: test-retest reliability, criterion-related validity with respect to two other measures of reading proficiency, and convergent and discriminant validity. Results indicated criterion-related validity of the MPLT was acceptable, but questioned the test-retest reliability and the convergent and discriminant validity. Implications for the development and the use of criterion-referenced tests are discussed. (Author)