diff --git a/nixos/tests/consul.nix b/nixos/tests/consul.nix
index 6233234ff083..c819312068dc 100644
--- a/nixos/tests/consul.nix
+++ b/nixos/tests/consul.nix
@@ -42,6 +42,8 @@ let
         ];
         networking.firewall = firewallSettings;
 
+        nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "consul" ];
+
         services.consul = {
           enable = true;
           inherit webUi;
@@ -65,6 +67,8 @@ let
         ];
         networking.firewall = firewallSettings;
 
+        nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "consul" ];
+
         services.consul =
           assert builtins.elem thisConsensusServerHost allConsensusServerHosts;
           {