To this date, few standardized tests measuring students' performance with regards to statistics exist. Only four tests have been proposed for college or university students. The goal of the present study is to investigate these tests. University professors or instructors experienced in teaching statistics were asked to list the concepts they think are being assessed by each item of the tests. A total of 708 responses were obtained from 42 participants. Using thematic analysis, 18 fundamental statistical concepts were identified. Unplanned analyses on participants' scores were also computed. The results suggest that there is no consensus on some of the items' correct answers. The study has practical implications for teaching statistics, from learning goals to assessment methods.