1 files changed, 2 insertions, 1 deletions
diff --git a/lib/sqlalchemy/testing/plugin/plugin_base.py b/lib/sqlalchemy/testing/plugin/plugin_base.py
index 0b4451b3c..52e42bb97 100644
--- a/lib/sqlalchemy/testing/plugin/plugin_base.py
+++ b/lib/sqlalchemy/testing/plugin/plugin_base.py
@@ -19,6 +19,7 @@ import logging
 import os
 import re
 import sys
+from typing import Any
 
 from sqlalchemy.testing import asyncio
 
@@ -738,7 +739,7 @@ class FixtureFunctions(abc.ABC):
         raise NotImplementedError()
 
     @abc.abstractmethod
-    def mark_base_test_class(self):
+    def mark_base_test_class(self) -> Any:
         raise NotImplementedError()
 
     @abc.abstractproperty