diff --git a/tests/test_litellm/proxy/_experimental/mcp_server/outbound_credentials/test_resolver.py b/tests/test_litellm/proxy/_experimental/mcp_server/outbound_credentials/test_resolver.py
index 2eab053ab73..5fab4ceec72 100644
--- a/tests/test_litellm/proxy/_experimental/mcp_server/outbound_credentials/test_resolver.py
+++ b/tests/test_litellm/proxy/_experimental/mcp_server/outbound_credentials/test_resolver.py
@@ -19,6 +19,7 @@ from pydantic import SecretStr
 
 from litellm.proxy._experimental.mcp_server.outbound_credentials import (
     ApiKeyConfig,
+    AuthConfig,
     AuthorizationCodeConfig,
     AwsSigV4Config,
     Byok,
@@ -1216,7 +1217,9 @@ async def test_passthrough_ignores_the_carrier_and_keeps_the_callers_slot():
         (AuthorizationCodeConfig(), Subject(tenant_id="", subject_id="alice"), "stored-user-token", "Bearer stored-alice"),
     ],
 )
-async def test_resolved_source_matches_the_credential_sent_upstream(config, subject, expected_source, expected_header):
+async def test_resolved_source_matches_the_credential_sent_upstream(
+    config: AuthConfig, subject: Subject, expected_source: str, expected_header: str | None
+) -> None:
     from litellm.proxy._experimental.mcp_server.outbound_credentials.resolver import resolve_credentials_with_source
 
     store = _FakeTokenStore({("alice", "s"): OAuthToken(access_token="stored-alice")})
@@ -1230,7 +1233,7 @@ async def test_resolved_source_matches_the_credential_sent_upstream(config, subj
 
 
 @pytest.mark.asyncio
-async def test_resolved_source_preserves_missing_user_token_error():
+async def test_resolved_source_preserves_missing_user_token_error() -> None:
     from litellm.proxy._experimental.mcp_server.outbound_credentials.resolver import resolve_credentials_with_source
 
     result = await resolve_credentials_with_source(UpstreamCredentialProvider(), _SUBJECT, _spec(AuthorizationCodeConfig()))
@@ -1239,7 +1242,7 @@ async def test_resolved_source_preserves_missing_user_token_error():
 
 
 @pytest.mark.asyncio
-async def test_minted_token_sources_match_egress_and_do_not_fetch_twice():
+async def test_minted_token_sources_match_egress_and_do_not_fetch_twice() -> None:
     from litellm.proxy._experimental.mcp_server.outbound_credentials.resolver import resolve_credentials_with_source
 
     source = _FakeM2MSource(Ok(OAuthToken(access_token="m2m-at")))
@@ -1259,7 +1262,7 @@ async def test_minted_token_sources_match_egress_and_do_not_fetch_twice():
 
 
 @pytest.mark.asyncio
-async def test_id_jag_source_describes_final_token_after_both_exchanges():
+async def test_id_jag_source_describes_final_token_after_both_exchanges() -> None:
     from litellm.proxy._experimental.mcp_server.outbound_credentials.resolver import resolve_credentials_with_source
 
     endpoint = _FakeTokenEndpoint(_two_leg_ok("resource-token"))
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 99447acd371..adf985e9a21 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
@@ -5,7 +5,7 @@ import logging
 import os
 import sys
 from datetime import datetime
-from typing import Any, Dict, Final, Optional
+from typing import Any, Dict, Final, Literal, Optional
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
@@ -12582,8 +12582,11 @@ async def test_pre_call_tool_check_honors_guardrail_attached_to_key(monkeypatch,
     ],
 )
 async def test_debug_resolution_matches_final_header_conflict_winner(
-    config, extra_headers, expected_source, expected_authorization
-):
+    config: Literal["stored", "static", "none"],
+    extra_headers: dict[str, str] | None,
+    expected_source: str,
+    expected_authorization: str | None,
+) -> None:
     from mcp.server.lowlevel.server import request_ctx
     from mcp.shared.context import RequestContext
     from starlette.requests import Request
@@ -12598,7 +12601,7 @@ async def test_debug_resolution_matches_final_header_conflict_winner(
     from litellm.types.mcp_server.mcp_server_manager import MCPServer
 
     class Store:
-        def __init__(self):
+        def __init__(self) -> None:
             self.calls = 0
 
         async def fetch(self, user_id: str, server_id: str) -> OAuthToken | None:
@@ -12641,7 +12644,7 @@ async def test_debug_resolution_matches_final_header_conflict_winner(
 
 @pytest.mark.asyncio
 @pytest.mark.parametrize("transport", ["http", "stdio"])
-async def test_debug_reports_legacy_signing_and_non_http_transport(transport):
+async def test_debug_reports_legacy_signing_and_non_http_transport(transport: Literal["http", "stdio"]) -> None:
     from mcp.server.lowlevel.server import request_ctx
     from mcp.shared.context import RequestContext
     from starlette.requests import Request