This is a protocol for a Campbell Review following JBI scoping review methodology. The objectives are to answer the following questions: What has been reported in the literature about collaborative learner-educator design, implementation, or evaluation of learner assessment in health professional education? (1) Where is learner-educator co-creation of assessment occurring? (i.e., which disciplines, course types, level of learner, year of study). (2) What course assessment decisions are influenced or being made together? (i.e., assessment instructions and/or grades). (3) How much influence do learners have on decision-making? (i.e., where does it fall on Bovill and Bulley's ladder of participation). (4) How do learners and educators go about making decisions together? (i.e., discussion or voting, with a whole class or portion of the class). (5) What are the perceived benefits, disadvantages, barriers, and/or facilitators reported by the authors?