diff --git a/tests/integration/observability/test_grayswan_wire.py b/tests/integration/observability/test_grayswan_wire.py
index 589c8d9d340..b14e4a42079 100644
--- a/tests/integration/observability/test_grayswan_wire.py
+++ b/tests/integration/observability/test_grayswan_wire.py
@@ -106,7 +106,7 @@ def _grayswan_config(
     return path
 
 
-def _vendor(violation: float = 0.0):
+def _vendor(violation: float = 0.0) -> Callable[[Request], Reply]:
     def respond(request: Request) -> Reply:
         assert request.method == "POST"
         assert request.target == "/cygnal/monitor", request.target
@@ -125,7 +125,7 @@ def _serving_model_probe(respond: Callable[[Request], Reply]) -> Callable[[Reque
     return wrapped
 
 
-def _chat_provider(message: dict[str, JsonValue]):
+def _chat_provider(message: dict[str, JsonValue]) -> Callable[[Request], Reply]:
     def respond(request: Request) -> Reply:
         assert request.target == "/chat/completions", request.target
         return Reply(
@@ -577,7 +577,7 @@ def test_post_call_multi_choice_texts_and_tool_calls_stay_split(gateway: Gateway
             ], body
 
 
-def _chat_stream_provider(chunks: int):
+def _chat_stream_provider(chunks: int) -> Callable[[Request], Reply]:
     def respond(request: Request) -> Reply:
         assert request.target == "/chat/completions", request.target
         frames: Final = tuple(
diff --git a/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_grayswan.py b/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_grayswan.py
index 83b0be53fee..954c57b5cb6 100644
--- a/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_grayswan.py
+++ b/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_grayswan.py
@@ -248,7 +248,7 @@ async def test_run_guardrail_posts_payload(monkeypatch, grayswan_guardrail: Gray
 
     def fake_process(
         response_json: dict,
-        data: dict | None = None,
+        data: dict[str, object] | None = None,
         hook_type: GuardrailEventHooks | None = None,
     ) -> None:
         captured["response"] = response_json
@@ -598,11 +598,13 @@ def test_ensure_litellm_metadata_noop_when_already_present() -> None:
 
 
 class _CapturingClient:
-    def __init__(self, payload: dict[str, float] | None = None):
+    def __init__(self, payload: dict[str, float] | None = None) -> None:
         self.payload = payload or {"violation": 0.0}
         self.calls: tuple[Mapping[str, object], ...] = ()
 
-    async def post(self, *, url: str, headers: dict, json: dict, timeout: float):
+    async def post(
+        self, *, url: str, headers: Mapping[str, str], json: Mapping[str, object], timeout: float
+    ) -> _DummyResponse:
         self.calls = (
             *self.calls,
             MappingProxyType({"url": url, "headers": headers, "json": json, "timeout": timeout}),
@@ -611,7 +613,7 @@ class _CapturingClient:
 
 
 class _LoggingObj:
-    def __init__(self, call_type):
+    def __init__(self, call_type: str | None) -> None:
         self.call_type = call_type