diff --git a/nixos/tests/wstunnel.nix b/nixos/tests/wstunnel.nix
index 12547213f20b..7a0a8ce3496a 100644
--- a/nixos/tests/wstunnel.nix
+++ b/nixos/tests/wstunnel.nix
@@ -1,5 +1,3 @@
-{ lib, ... }:
-
 let
   certs = import ./common/acme/server/snakeoil-certs.nix;
   domain = certs.domain;