diff --git a/tests/default.nix b/tests/default.nix
index 2efe151ab79..46b3218168f 100644
--- a/tests/default.nix
+++ b/tests/default.nix
@@ -31,6 +31,7 @@ in
   firefox = apply (import ./firefox.nix);
   installer = pkgs.lib.mapAttrs (name: complete) (call (import ./installer.nix));
   kde4 = apply (import ./kde4.nix);
+  portmap = apply (import ./portmap.nix);
   proxy = apply (import ./proxy.nix);
   quake3 = apply (import ./quake3.nix);
   subversion = apply (import ./subversion.nix);
diff --git a/tests/portmap.nix b/tests/portmap.nix
new file mode 100644
index 00000000000..4ee4eb02890
--- /dev/null
+++ b/tests/portmap.nix
@@ -0,0 +1,17 @@
+{ pkgs, ... }:
+
+{
+
+  machine =
+    { config, pkgs, ... }:
+
+    { services.portmap.enable = true; };
+
+  testScript =
+    ''
+       # The `portmap' service must be registered once for TCP and once for
+       # UDP.
+       $machine->mustSucceed("test `rpcinfo -p | grep portmapper | wc -l` -eq 2");
+    '';
+
+}