This paper focuses on the impact of introducing a Group Dynamics Training Activity (GDTA) on learners' reported engagement during the course. The context is a university Common European Framework of Reference for languages (CEFR) B2 French language online course over the course of two semesters. Data was collected in the form of online surveys during the semester prior to the introduction of the GDTA and during the semester when it was administered. This case study uses quantitative analysis of Likert-scale question responses and qualitative analysis of open fields in the questionnaires using a content analysis methodology. Results indicate that the GDTA had a positive impact on learners, particularly on the social and cognitive dimension of learner engagement. [For the complete volume, "Intelligent CALL, Granular Systems and Learner Data: Short Papers from EUROCALL 2022 (30th, Reykjavik, Iceland, August 17-19, 2022)," see ED624779.]