diff --git a/hwci/shell.nix b/hwci/shell.nix
index e361066..d4e0c93 100644
--- a/hwci/shell.nix
+++ b/hwci/shell.nix
@@ -1,7 +1,7 @@
 # Licensed under the Apache License, Version 2.0 or the MIT License.
 # SPDX-License-Identifier: Apache-2.0 OR MIT
 # Copyright Tock Contributors 2024.
-
+#TEST
 {pkgs ? import <nixpkgs> {}}: let
   pythonEnv = pkgs.python311.withPackages (ps:
     with ps; [