The Testing REDD+ in the Beira Landscape Corridor of Mozambique initiative closed in December. Over nearly four years, a consortium of public academic and research institutions, NGOs and social enterprises, supported by the Government of Norway, has explored what drives deforestation and forest degradation. The programme trialled four interventions: to expand conservation agriculture, to make logging more sustainable, to harvest and use biomass energy more efficiently, and to promote sustainable production of an important non-timber product. We now know what works.