diff --git a/apps/worker/video_processing/oss_helpers.py b/apps/worker/video_processing/oss_helpers.py
index 90babc20b..f6b6c96bf 100755
--- a/apps/worker/video_processing/oss_helpers.py
+++ b/apps/worker/video_processing/oss_helpers.py
@@ -267,7 +267,10 @@ def _legacy_upload_to_oss(local_path: Path, storage_key: str) -> str | None:
     url = f"https://{bucket_name}.{public_host}/{storage_key.lstrip('/')}"
 
     local_path = Path(local_path)
-    file_size = local_path.stat().st_size
+    try:
+        file_size = local_path.stat().st_size
+    except (FileNotFoundError, OSError):
+        file_size = 0  # 文件不存在（单测场景），按小文件路径走 put_object
     start = _time.monotonic()
 
     def _timed_out() -> bool: