This article explores which tensions teachers experience during one year of participation in a professional learning community (PLC). Tensions are more or less temporal negative feelings of stress, loss of self-efficacy or anxiety caused by conflicting personal features and workplace affordances. A qualitative study including two semi-structured interviews with 18 teachers participating for one year in a PLC revealed that 15 out of 18 teachers experience one or more tensions. More specifically, eight different tensions are identified, in which tensions concerning high work pressure and a lack of shared learning are most commonly reported. The results further indicate temporal, contextual and personal nature of tensions. It is concluded that tensions are often caused by negatively perceived learning cultures in schools.