ABSTRACT Increasingly, progressive organizing faces pressures to adopt intersectional forms of solidarity. Intersectional solidarity consists of an ongoing process of creating ties and coalitions across social group differences by negotiating power asymmetries. This approach to organizing is not a static outcome that movements achieve and preserve. Movements that seek to enact intersectional solidarity must engage in ongoing struggles to sustain it. This article focuses on the case of the International Women’s Strike (IWS) of 2017 and 2018 in Spain. We use this case to identify circumstances that can lead to failures to sustain intersectional solidarity and the consequences of the ruptures that follow. In the case of the International Women’s Strike, initial calls to organize around the subject of women and women’s labor mobilized broad support in 2017. Black women in Spain affiliated with a group known as Afroféminas called on expanding the subject of local IWS mobilization to center the experiences of Black subjects. In a broadly circulated announcement, Afroféminas called out this experience and announced that they would not participate in the International Women’s Strike. The case of the International Women’s Strike in Spain showcases an instance under which the search for intersectional solidarity can generate broad intersectional consciousness even when it leads to separate organizing tracks. The development of autonomous Black activist spaces informed the continuity and deepening of intersectional consciousness but limited the magnitude of the praxis (e.g. Afroféminas did not participate in the broader praxis that generated disruptive tactics and mobilized larger masses). In choosing to consider racism as a form of violence within one system of capitalist exploitation, limited notions of subjectivity dominated IWS. On the other hand, Afroféminas’ withdrawal of participation limited the scope of praxis and raised questions about the representativeness and inclusiveness of the broader movement. Thus, intersectional and oppositional consciousness can emerge from the withdrawal of intersectionally marginalized groups from coalition work while challenging the enactment of mass intersectional praxis.