diff --git a/crates/nu_plugin_python/plugin.py b/crates/nu_plugin_python/plugin.py
index 8de647dcdf..223a53bb30 100644
--- a/crates/nu_plugin_python/plugin.py
+++ b/crates/nu_plugin_python/plugin.py
@@ -41,6 +41,8 @@ def signatures():
                 "name": "nu-python",
                 "usage": "Signature test for Python",
                 "extra_usage": "",
+                "input_type": "Any",
+                "output_type": "Any",
                 "required_positional": [
                     {
                         "name": "a",