diff --git a/nixos/tests/predictable-interface-names.nix b/nixos/tests/predictable-interface-names.nix
index b4c2039923cf..0b431034a7a9 100644
--- a/nixos/tests/predictable-interface-names.nix
+++ b/nixos/tests/predictable-interface-names.nix
@@ -1,27 +1,24 @@
-{ system ? builtins.currentSystem
-, pkgs ? import ../.. { inherit system; }
-}:
-with import ../lib/testing.nix { inherit system; };
-let boolToString = x: if x then "yes" else "no"; in
-let testWhenSetTo = predictable: withNetworkd:
-makeTest {
-  name = "${if predictable then "" else "un"}predictableInterfaceNames${if withNetworkd then "-with-networkd" else ""}";
-  meta = {};
+{ system ? builtins.currentSystem }:
 
-  machine = { config, pkgs, ... }: {
-    networking.usePredictableInterfaceNames = pkgs.stdenv.lib.mkForce predictable;
-    networking.useNetworkd = withNetworkd;
-    networking.dhcpcd.enable = !withNetworkd;
+let
+  inherit (import ../lib/testing.nix { inherit system; }) makeTest pkgs;
+in pkgs.lib.listToAttrs (pkgs.lib.crossLists (predictable: withNetworkd: {
+  name = pkgs.lib.optionalString (!predictable) "un" + "predictable"
+       + pkgs.lib.optionalString withNetworkd "Networkd";
+  value = makeTest {
+    name = "${if predictable then "" else "un"}predictableInterfaceNames${if withNetworkd then "-with-networkd" else ""}";
+    meta = {};
+
+    machine = { config, lib, ... }: {
+      networking.usePredictableInterfaceNames = lib.mkForce predictable;
+      networking.useNetworkd = withNetworkd;
+      networking.dhcpcd.enable = !withNetworkd;
+    };
+
+    testScript = ''
+      print $machine->succeed("ip link");
+      $machine->succeed("ip link show ${if predictable then "ens3" else "eth0"}");
+      $machine->fail("ip link show ${if predictable then "eth0" else "ens3"}");
+    '';
   };
-
-  testScript = ''
-    print $machine->succeed("ip link");
-    $machine->succeed("ip link show ${if predictable then "ens3" else "eth0"}");
-    $machine->fail("ip link show ${if predictable then "eth0" else "ens3"}");
-  '';
-}; in
-with pkgs.stdenv.lib.lists;
-with pkgs.stdenv.lib.attrsets;
-listToAttrs (map (drv: nameValuePair drv.name drv) (
-crossLists testWhenSetTo [[true false] [true false]]
-))
+}) [[true false] [true false]])