diff --git a/tests/unit/distribution/routers/test_routing_tables.py b/tests/unit/distribution/routers/test_routing_tables.py
index 8c1838ba3..bfa93d913 100644
--- a/tests/unit/distribution/routers/test_routing_tables.py
+++ b/tests/unit/distribution/routers/test_routing_tables.py
@@ -130,7 +130,7 @@ class ToolGroupsImpl(Impl):
     async def unregister_toolgroup(self, toolgroup_id: str):
         return toolgroup_id
 
-    async def list_runtime_tools(self, toolgroup_id, mcp_endpoint):
+    async def list_runtime_tools(self, toolgroup_id, mcp_endpoint, authorization=None):
         return ListToolDefsResponse(
             data=[
                 ToolDef(