diff --git a/litellm/llms/custom_httpx/llm_http_handler.py b/litellm/llms/custom_httpx/llm_http_handler.py
index b66cad85315..de860ea762c 100644
--- a/litellm/llms/custom_httpx/llm_http_handler.py
+++ b/litellm/llms/custom_httpx/llm_http_handler.py
@@ -4,6 +4,7 @@ import ssl
 from typing import (
     TYPE_CHECKING,
     Any,
+    AsyncGenerator,
     AsyncIterator,
     Coroutine,
     Dict,
@@ -154,7 +155,7 @@ else:
 
 async def _async_file_chunks(
     fp: Any, chunk_size: int = 65536
-) -> "AsyncIterator[bytes]":
+) -> "AsyncGenerator[bytes, None]":
     """Async generator that reads a sync file-like object in chunks via a thread executor.
 
     Dispatches each blocking disk read to a thread pool via anyio so the async
diff --git a/tests/test_litellm/proxy/openai_files_endpoint/test_files_endpoint.py b/tests/test_litellm/proxy/openai_files_endpoint/test_files_endpoint.py
index ab1fd795d8a..03517c1150b 100644
--- a/tests/test_litellm/proxy/openai_files_endpoint/test_files_endpoint.py
+++ b/tests/test_litellm/proxy/openai_files_endpoint/test_files_endpoint.py
@@ -2,7 +2,7 @@ import io
 import json
 import os
 import sys
-from typing import Union
+from typing import Any, Union
 from unittest.mock import ANY
 
 import pytest
@@ -25,9 +25,9 @@ from litellm.types.llms.openai import OpenAIFileObject
 client = TestClient(app)
 
 
-def _get_file_size(file_content: Union[bytes, io.IOBase]) -> int:
+def _get_file_size(file_content: Union[bytes, Any]) -> int:
     """Return file size without loading IO objects fully into memory."""
-    if isinstance(file_content, io.IOBase):
+    if hasattr(file_content, "read") and hasattr(file_content, "seek"):
         pos = file_content.tell()
         file_content.seek(0, 2)
         size = file_content.tell()