The most prevalent mental health challenges in teenagers are generalized anxiety disorder and depression. The (COVID-19) pandemic has added an extra negative effect on children's mental health. This study focuses on the investigation of a specific form of adolescent anxiety, i.e. test anxiety (TA). TA in adolescents is associated with mental and behavioral comorbidities and may have adverse effects on students' academic performance as well as their physiological and psychological well-being. Therefore, this study examines the impact of family communication and body image dissatisfaction on adolescents' test anxiety in Greece. According to the results of the Structural Equation Model that was examined, family communication presented a minimal negative effect on students' TA. However, the main finding of this study was that body image dissatisfaction had an important direct and minimal indirect effect on students' TA. The indirect effect was via the physical activity hours that acted as a mediator between body image dissatisfaction and TA. As a result, examining body image concerns and enhancing family communication may be crucial in assisting adolescents at risk for severe TA symptoms. Implications of the findings are discussed.