The arrival of populist political parties to power in several member states and the increasing politicisation of EU foreign policy has made intra-European consensus more difficult to reach in the past decade. This article examines the impact of populist contestation on EU foreign policy negotiations in the Council, a policy area governed by unanimity. This mode of decision-making makes the policy especially vulnerable to the impact of contestation and, at the same time, gives power to those willing to use their veto. Drawing on the idea of unpopulist politics, as defined in the introduction, it shows how Hungary and, to a lesser degree, Poland, have contested established formal and informal norms − such as consensus-building or reflex coordination − through discursive and behavioural non-compliance. The ‘domestication’ of EU foreign policy has meant that, in general, populist show less willingness to compromise and to use non-decisions to show that the EU is weak and useless than non-populist governments. However, there are exceptions, and it is possible to see variations in populist’s strategies in Brussels when faced with similar challenges, as we exemplify in the article on the case of the EU’s response to Russia’s war in Ukraine. We test the scope conditions under which ‘unpolitics’ might be activated. In this case, the same ‘crisis’ situation did not lead to a uniform response amongst populist governments. This is because both the nature of the crisis and perceptions of risk/gain were differently understood (and actively constructed as such) by populists in power. This finding emphasizes the social, relational and multi-level nature of unpolitics as a phenomenon.