diff --git a/nixos/tests/predictable-interface-names.nix b/nixos/tests/predictable-interface-names.nix
index 194b4dafa77..83883477a5c 100644
--- a/nixos/tests/predictable-interface-names.nix
+++ b/nixos/tests/predictable-interface-names.nix
@@ -4,7 +4,7 @@
 }:
 
 let
-  inherit (import ../lib/testing.nix { inherit system pkgs; }) makeTest;
+  inherit (import ../lib/testing-python.nix { inherit system pkgs; }) makeTest;
 in pkgs.lib.listToAttrs (pkgs.lib.crossLists (predictable: withNetworkd: {
   name = pkgs.lib.optionalString (!predictable) "un" + "predictable"
        + pkgs.lib.optionalString withNetworkd "Networkd";
@@ -20,8 +20,8 @@ in pkgs.lib.listToAttrs (pkgs.lib.crossLists (predictable: withNetworkd: {
     };
 
     testScript = ''
-      print $machine->succeed("ip link");
-      $machine->${if predictable then "fail" else "succeed"}("ip link show eth0 ");
+      print(machine.succeed("ip link"))
+      machine.${if predictable then "fail" else "succeed"}("ip link show eth0")
     '';
   };
 }) [[true false] [true false]])