diff --git a/nixos/tests/make-test.nix b/nixos/tests/make-test.nix
index 1b571a008e0..ee4ba310ad5 100644
--- a/nixos/tests/make-test.nix
+++ b/nixos/tests/make-test.nix
@@ -2,4 +2,4 @@ f: { system ? builtins.currentSystem, ... } @ args:
 
 with import ../lib/testing.nix { inherit system; };
 
-makeTest (if lib.isFunction f then f (args // { inherit pkgs; inherit (pkgs) lib; }) else f)
+makeTest (if pkgs.lib.isFunction f then f (args // { inherit pkgs; inherit (pkgs) lib; }) else f)