diff --git a/tests/test_litellm/proxy/_experimental/mcp_server/test_mcp_server_manager.py b/tests/test_litellm/proxy/_experimental/mcp_server/test_mcp_server_manager.py
index 6cbdcd28208..11e9dbbdd57 100644
--- a/tests/test_litellm/proxy/_experimental/mcp_server/test_mcp_server_manager.py
+++ b/tests/test_litellm/proxy/_experimental/mcp_server/test_mcp_server_manager.py
@@ -450,7 +450,7 @@ class TestMCPServerManager:
         captured_extra_headers = None
 
         async def capture_create_mcp_client(
-            server, mcp_auth_header, extra_headers, stdio_env
+            server, mcp_auth_header, extra_headers, stdio_env, subject_token=None
         ):  # pragma: no cover - helper
             nonlocal captured_extra_headers
             captured_extra_headers = extra_headers