diff --git a/ydb_dbapi/connections.py b/ydb_dbapi/connections.py
index c9bf773..faf1be4 100644
--- a/ydb_dbapi/connections.py
+++ b/ydb_dbapi/connections.py
@@ -263,7 +263,7 @@ def callee() -> ydb.Directory:
             if child.is_table():
                 result.append(child_abs_path)
             elif child.is_directory() and not child.name.startswith("."):
-                result.extend(self.get_table_names(child_abs_path))
+                result.extend(self._get_table_names(child_abs_path))
         return result
 
 
@@ -392,7 +392,7 @@ async def callee() -> ydb.Directory:
             if child.is_table():
                 result.append(child_abs_path)
             elif child.is_directory() and not child.name.startswith("."):
-                result.extend(await self.get_table_names(child_abs_path))
+                result.extend(await self._get_table_names(child_abs_path))
         return result