English as a Medium of Instruction (EMI) has been primarily focused on teaching methods and techniques while assessment, as an area of expertise, has been largely neglected by practitioners and researchers. So, the major aim of this session is to bring the whole range of assessment issues into focus of the discussion and to offer some hands-on experience to all the session participants. The aims and objectives of this session will be narrowed to the assessment of EMI university teachers’ proficiency and will be based on the case study of the Cambridge EMI online course. The overall analysis of the assessment tools will be offered together with a series of practical tasks followed by the group discussion about the major criteria of assessment techniques and tools: validity, reliability and practicality. A number of practical tips and recommendations will be offered to the audience to stimulate their reflective and critical evaluation and, hopefully, to make a contribution to their overall understanding of the whole complexity of assessment issues in the context of EMI in higher education.