diff --git a/pkgs/development/python-modules/fastmcp/default.nix b/pkgs/development/python-modules/fastmcp/default.nix
index fcffa502451a..7e91558421bb 100644
--- a/pkgs/development/python-modules/fastmcp/default.nix
+++ b/pkgs/development/python-modules/fastmcp/default.nix
@@ -98,6 +98,9 @@ buildPythonPackage rec {
     "test_multi_client"
     "test_canonical_multi_client_with_transforms"
 
+    # AssertionError: assert {'annotations...object'}, ...} == {'annotations...sers']}}, ...}
+    "test_list_tools"
+
     # fastmcp.exceptions.ToolError: Unknown tool
     "test_multi_client_with_logging"
     "test_multi_client_with_elicitation"