Drawing on multiple group-level theories, we explored boundary conditions of the relationship between positive group affective tone (PGAT) and team creativity. We collected data from members and leaders of 68 research and development teams and performed hierarchical linear modeling analyses to test our hypotheses. Consistent with the “group-centrism” perspective, we found that PGAT was beneficial for team creativity only when team trust was low; when trust was high, PGAT had a negative relationship with team creativity. In accord with the “dual-tuning” perspective, the positive effect of PGAT on creativity was present only when team trust was low but negative group affective tone was high. We discussed the theoretical and practical implications. Copyright © 2011 John Wiley & Sons, Ltd.