diff --git a/tests/multiple.nix b/tests/multiple.nix
index daf468a..8a4c07b 100644
--- a/tests/multiple.nix
+++ b/tests/multiple.nix
@@ -30,12 +30,7 @@ let
       };
       services.dnsmasq = {
         enable = true;
-        # Fixme: once nixos-22.11 has been removed, could be replaced by
-        # settings.mx-host = [ "domain1.com,domain1,10" "domain2.com,domain2,10" ];
-        extraConfig = ''
-          mx-host=domain1.com,domain1,10
-          mx-host=domain2.com,domain2,10
-        '';
+        settings.mx-host = [ "domain1.com,domain1,10" "domain2.com,domain2,10" ];
       };
     };