The article examines the role of digital tools to support formative assessment in university mathematics teaching. Formative assessment is considered as a purposeful systematic process of collecting, analyzing, and using information about the educational achievements of students to improve their learning and improve teaching. Considering the peculiarities of mathematical disciplines that distinguish them from other academic disciplines, the article argues the importance of formative assessment in mathematics and formulates key indicators of mathematical competence that are subject to assessment. Pedagogical tools of formative assessment in mathematical disciplines are proposed and the ability of digital tools to increase their effectiveness is argued. Examples of the use of individual tools from the teaching practice of the authors of the article are given.