diff --git a/nixos/tests/kubernetes/base.nix b/nixos/tests/kubernetes/base.nix
index 8a6756b8f9e5..4665428a4027 100644
--- a/nixos/tests/kubernetes/base.nix
+++ b/nixos/tests/kubernetes/base.nix
@@ -18,7 +18,7 @@ let
     }:
     let
       masterName = head (
-        filter (machineName: lib.elem "master" machines.${machineName}.roles) (attrNames machines)
+        filter (machineName: elem "master" machines.${machineName}.roles) (attrNames machines)
       );
       master = machines.${masterName};
       extraHosts = ''