diff --git a/litellm/rust_bridge/ocr.py b/litellm/rust_bridge/ocr.py
index a592b128f2e..0efdc227335 100644
--- a/litellm/rust_bridge/ocr.py
+++ b/litellm/rust_bridge/ocr.py
@@ -19,8 +19,8 @@ class RustOcr(Protocol):
         extra_headers: dict[str, object] | None,
         optional_params: dict[str, object],
         timeout_seconds: float | None,
-        callbacks: list[object] | None,
-        guardrails: list[object] | None,
+        callbacks: list[object] | None = None,
+        guardrails: list[object] | None = None,
     ) -> dict[str, object]:
         raise NotImplementedError
 
@@ -36,8 +36,8 @@ class RustAocr(Protocol):
         extra_headers: dict[str, object] | None,
         optional_params: dict[str, object],
         timeout_seconds: float | None,
-        callbacks: list[object] | None,
-        guardrails: list[object] | None,
+        callbacks: list[object] | None = None,
+        guardrails: list[object] | None = None,
     ) -> Awaitable[dict[str, object]]:
         raise NotImplementedError
 
@@ -127,18 +127,21 @@ def ocr(
     rust_ocr = load_rust_ocr()
     if rust_ocr is None:
         return None
-    return rust_ocr(
-        model=model,
-        document=cast(dict[str, object], document),
-        api_key=api_key,
-        api_base=api_base,
-        custom_llm_provider=custom_llm_provider,
-        extra_headers=cast(dict[str, object] | None, extra_headers),
-        optional_params=optional_params,
-        timeout_seconds=_timeout_to_seconds(timeout),
-        callbacks=callbacks,
-        guardrails=guardrails,
-    )
+    kwargs: dict[str, object] = {
+        "model": model,
+        "document": cast(dict[str, object], document),
+        "api_key": api_key,
+        "api_base": api_base,
+        "custom_llm_provider": custom_llm_provider,
+        "extra_headers": cast(dict[str, object] | None, extra_headers),
+        "optional_params": optional_params,
+        "timeout_seconds": _timeout_to_seconds(timeout),
+    }
+    if callbacks:
+        kwargs["callbacks"] = callbacks
+    if guardrails:
+        kwargs["guardrails"] = guardrails
+    return rust_ocr(**kwargs)
 
 
 async def aocr(
@@ -157,15 +160,18 @@ async def aocr(
     rust_aocr = load_rust_aocr()
     if rust_aocr is None:
         return None
-    return await rust_aocr(
-        model=model,
-        document=cast(dict[str, object], document),
-        api_key=api_key,
-        api_base=api_base,
-        custom_llm_provider=custom_llm_provider,
-        extra_headers=cast(dict[str, object] | None, extra_headers),
-        optional_params=optional_params,
-        timeout_seconds=_timeout_to_seconds(timeout),
-        callbacks=callbacks,
-        guardrails=guardrails,
-    )
+    kwargs: dict[str, object] = {
+        "model": model,
+        "document": cast(dict[str, object], document),
+        "api_key": api_key,
+        "api_base": api_base,
+        "custom_llm_provider": custom_llm_provider,
+        "extra_headers": cast(dict[str, object] | None, extra_headers),
+        "optional_params": optional_params,
+        "timeout_seconds": _timeout_to_seconds(timeout),
+    }
+    if callbacks:
+        kwargs["callbacks"] = callbacks
+    if guardrails:
+        kwargs["guardrails"] = guardrails
+    return await rust_aocr(**kwargs)
diff --git a/tests/test_litellm/ocr/test_rust_bridge.py b/tests/test_litellm/ocr/test_rust_bridge.py
index 7fdd85323ef..acad249a2bb 100644
--- a/tests/test_litellm/ocr/test_rust_bridge.py
+++ b/tests/test_litellm/ocr/test_rust_bridge.py
@@ -53,8 +53,6 @@ class RecordingBridge:
         extra_headers: dict[str, object] | None,
         optional_params: dict[str, object],
         timeout_seconds: float | None,
-        callbacks: list[object] | None = None,
-        guardrails: list[object] | None = None,
     ) -> dict[str, object]:
         self.calls.append(
             {
@@ -66,8 +64,6 @@ class RecordingBridge:
                 "extra_headers": extra_headers,
                 "optional_params": optional_params,
                 "timeout_seconds": timeout_seconds,
-                "callbacks": callbacks or [],
-                "guardrails": guardrails or [],
             }
         )
         return dict(FAKE_OCR_RESPONSE)
@@ -89,8 +85,6 @@ class RecordingAsyncBridge:
         extra_headers: dict[str, object] | None,
         optional_params: dict[str, object],
         timeout_seconds: float | None,
-        callbacks: list[object] | None = None,
-        guardrails: list[object] | None = None,
     ) -> dict[str, object]:
         self.calls.append(
             {
@@ -102,8 +96,6 @@ class RecordingAsyncBridge:
                 "extra_headers": extra_headers,
                 "optional_params": optional_params,
                 "timeout_seconds": timeout_seconds,
-                "callbacks": callbacks or [],
-                "guardrails": guardrails or [],
             }
         )
         return dict(FAKE_OCR_RESPONSE)
@@ -120,8 +112,6 @@ class RaisingBridge:
         extra_headers: dict[str, object] | None,
         optional_params: dict[str, object],
         timeout_seconds: float | None,
-        callbacks: list[object] | None = None,
-        guardrails: list[object] | None = None,
     ) -> dict[str, object]:
         raise RuntimeError("bridge failed")
 
@@ -137,8 +127,6 @@ class RaisingAsyncBridge:
         extra_headers: dict[str, object] | None,
         optional_params: dict[str, object],
         timeout_seconds: float | None,
-        callbacks: list[object] | None = None,
-        guardrails: list[object] | None = None,
     ) -> dict[str, object]:
         raise RuntimeError("bridge failed")
 
@@ -226,11 +214,9 @@ def build_prepared_request(
 @pytest.fixture(autouse=True)
 def _reset_rust_flag():
     """Keep the global toggle isolated between tests."""
-    litellm.logging_callback_manager._reset_all_callbacks()
     rust_bridge.use_litellm_rust(False, ocr=None, aocr=None)
     rust_bridge_loader._cached_bridge = rust_bridge_loader._BRIDGE_SENTINEL
     yield
-    litellm.logging_callback_manager._reset_all_callbacks()
     rust_bridge.use_litellm_rust(False, ocr=None, aocr=None)
     rust_bridge_loader._cached_bridge = rust_bridge_loader._BRIDGE_SENTINEL
 
@@ -414,8 +400,6 @@ def test_bridge_wrapper_forwards_prepared_args_and_wraps_response():
         },
         "optional_params": {"include_image_base64": True, "pages": [0]},
         "timeout_seconds": 12.5,
-        "callbacks": [],
-        "guardrails": [],
     }
 
 
@@ -445,8 +429,6 @@ async def test_bridge_wrapper_forwards_prepared_async_args_and_wraps_response():
         "extra_headers": None,
         "optional_params": {"vertex_project": "project-1"},
         "timeout_seconds": 42.0,
-        "callbacks": [],
-        "guardrails": [],
     }
 
 
@@ -480,8 +462,6 @@ def test_run_rust_ocr_prepares_request_and_wraps_response():
         },
         "optional_params": {"include_image_base64": True},
         "timeout_seconds": 12.5,
-        "callbacks": [],
-        "guardrails": [],
     }