Transnational city networks (TCNs) bring together the characteristics of both supranationalisation and subnationalisation processes. In the context of an increased securitisation and criminalisation of borders, several networks have become more vocal – particularly with the advent of the so-called ‘refugee crisis’ – advocating for inclusive changes in terms of immigration, integration, human rights protection and refugee resettlement. How do French cities position themselves in this context of increased transnational activism? In comparing the cases of Lyon, Nantes and Strasbourg and their respective involvement in TCNs over the last fifteen years, our findings indicate that instead of becoming increasingly active, French cities within European networks have developed three distinct processes of disinvolvement, which we identify according to their ‘neglectful,’ ‘testing,’ and ‘competing’ characteristics. We highlight the fact that, in some cases, the activities undertaken by municipal or metropolitan governments in city networks do not automatically lead to transnational ‘activism.’ They may instead be understood as forms of ‘passivism.’ Moreover, contrary to passivity, ‘passivism’ in these cases does not equal an absence of decision-making, leadership or responsiveness, nor does it refer to inertia or a distinctive approach towards refugees and asylum seekers (whether it be welcoming or exclusionary). Rather, ‘passivism’ refers to the agency of local actors in policy-making within a specific institutional context. Focusing on passivism highlights (i) the necessity to disentangle networks’ robustness from its membership, since networks might be robust despite the presence of disengaged members. It also underlines (ii) the effects of the politicisation of migration as illustrated by a change in agenda towards humanitarian issues and by the increased involvement of elected city officials, notably deputy mayors. Finally (iii), it stresses the lack of collaboration with civil society actors in the context of a greater visibility and activism of the French national state regarding the integration of newcomers.