diff --git a/pkgs/development/python-modules/mercantile/default.nix b/pkgs/development/python-modules/mercantile/default.nix
index 3d8485817d09..61357b3a7ad6 100644
--- a/pkgs/development/python-modules/mercantile/default.nix
+++ b/pkgs/development/python-modules/mercantile/default.nix
@@ -40,6 +40,8 @@ buildPythonPackage rec {
   ];
 
   disabledTests = [
+    # AssertionError CLI exists with non-zero error code
+    # This is a regression introduced by https://github.com/NixOS/nixpkgs/pull/448189
     "test_cli_bounding_tile"
     "test_cli_bounding_tile2"
     "test_cli_bounding_tile_bbox"