diff --git a/nixos/tests/ncdns.nix b/nixos/tests/ncdns.nix
index 50193676f34f..5099d697e035 100644
--- a/nixos/tests/ncdns.nix
+++ b/nixos/tests/ncdns.nix
@@ -29,10 +29,10 @@ in
   };
 
   nodes.server = { ... }: {
-    networking.nameservers = [ "127.0.0.1" ];
+    networking.nameservers = [ "::1" ];
 
     services.namecoind.rpc = {
-      address = "127.0.0.1";
+      address = "::1";
       user = "namecoin";
       password = "secret";
       port = 8332;
@@ -45,7 +45,7 @@ in
       script = ''
         while true; do
           echo -e "HTTP/1.1 200 OK\n\n $(<${fakeReply})\n" \
-            | ${pkgs.netcat}/bin/nc -N -l 127.0.0.1 8332
+            | ${pkgs.netcat}/bin/nc -N -l ::1 8332
         done
       '';
     };
@@ -58,14 +58,10 @@ in
       identity.address    = "1.0.0.1";
     };
 
-    services.pdns-recursor = {
-      enable = true;
-      dns.allowFrom = [ "127.0.0.0/8" ];
-      resolveNamecoin = true;
-    };
+    services.pdns-recursor.enable = true;
+    services.pdns-recursor.resolveNamecoin = true;
 
     environment.systemPackages = [ pkgs.dnsutils ];
-
   };
 
   testScript =
@@ -91,6 +87,7 @@ in
           assert "example.com" in server.succeed("dig SOA @localhost -p 5333 bit")
 
       with subtest("bit. zone forwarding works"):
+          server.wait_for_unit("pdns-recursor")
           assert "1.2.3.4" in server.succeed("host test.bit")
     '';
 })