The decolonisation of higher education in South Africa is closely linked to questions of knowledge production. The epistemic violence of the colonial encounter has put into question the possibilities and modes of doing research in marginalised communities. In this article, I argue that praxis in community social psychology can lead to more relevant and just research methods, especially when rooted in liberation thinking. In the South African and African context, this requires an engagement with the particularities of Blackness and the Black experience. Drawing on examples of participatory action research projects with young Africans using Photovoice methods, and the establishment of the Black Academic Caucus at the University of Cape Town, the article shows the links between praxis and epistemic justice as exercised within the cultural practices of the university, and between researchers and participants from marginalised communities.