diff --git a/skbase/tests/conftest.py b/skbase/tests/conftest.py
index 07f6df8b..9907499a 100644
--- a/skbase/tests/conftest.py
+++ b/skbase/tests/conftest.py
@@ -188,6 +188,7 @@
 SKBASE_FUNCTIONS_BY_MODULE = SKBASE_PUBLIC_FUNCTIONS_BY_MODULE.copy()
 SKBASE_FUNCTIONS_BY_MODULE.update(
     {
+        "skbase.base._clone_base":{"_check_clone", "_clone"},
         "skbase.base._pretty_printing._object_html_repr": (
             "_get_visual_block",
             "_object_html_repr",