diff --git a/litellm/llms/base_llm/ocr/transformation.py b/litellm/llms/base_llm/ocr/transformation.py
index 3668c64defa..280a8e43049 100644
--- a/litellm/llms/base_llm/ocr/transformation.py
+++ b/litellm/llms/base_llm/ocr/transformation.py
@@ -78,7 +78,7 @@ class OCRResponse(LiteLLMPydanticObjectBase):
     _hidden_params: dict = PrivateAttr(default_factory=dict)
 
     def model_post_init(self, __context: Any) -> None:
-        extra_fields = getattr(self, "__pydantic_extra__", None)
+        extra_fields = self.model_extra
         if isinstance(extra_fields, dict):
             hidden_params = extra_fields.pop("_hidden_params", None)
             if isinstance(hidden_params, dict):
diff --git a/litellm/ocr/main.py b/litellm/ocr/main.py
index 6cd8b641b34..9ddd713d5fa 100644
--- a/litellm/ocr/main.py
+++ b/litellm/ocr/main.py
@@ -266,6 +266,8 @@ def _get_rust_bridge_callbacks() -> tuple[list[object], list[object]]:
         if isinstance(callback, CustomGuardrail):
             if callback not in guardrails:
                 guardrails.append(callback)
+        # CustomGuardrail inherits CustomLogger; keep it in both lists so
+        # Rust OCR runs guard hooks and success/failure logging hooks.
         if isinstance(callback, CustomLogger) and callback not in callbacks:
             callbacks.append(callback)
     return callbacks, guardrails
diff --git a/litellm/proxy/spend_tracking/spend_tracking_utils.py b/litellm/proxy/spend_tracking/spend_tracking_utils.py
index 48493fec7ab..3be8482f06b 100644
--- a/litellm/proxy/spend_tracking/spend_tracking_utils.py
+++ b/litellm/proxy/spend_tracking/spend_tracking_utils.py
@@ -390,7 +390,9 @@ def get_logging_payload(kwargs, response_obj, start_time, end_time) -> SpendLogs
         ),
         litellm_overhead_time_ms=litellm_overhead_time_ms,
         litellm_rust=(
-            standard_logging_payload.get("hidden_params", {}).get("litellm_rust", None)
+            (standard_logging_payload.get("hidden_params") or {}).get(
+                "litellm_rust", None
+            )
             if standard_logging_payload is not None
             else None
         ),
diff --git a/tests/ocr_tests/test_ocr_rust_bridge_callbacks.py b/tests/ocr_tests/test_ocr_rust_bridge_callbacks.py
index 6393f6381b5..0fb7dab7eda 100644
--- a/tests/ocr_tests/test_ocr_rust_bridge_callbacks.py
+++ b/tests/ocr_tests/test_ocr_rust_bridge_callbacks.py
@@ -1,4 +1,4 @@
-"""Tests proving Rust OCR receives and executes Python callbacks."""
+"""Network-free tests proving Rust OCR receives and executes Python callbacks."""
 
 from datetime import datetime
 from typing import Any, Optional
@@ -14,7 +14,7 @@ from litellm.types.utils import StandardLoggingPayload
 MODEL = "mistral/mistral-ocr-latest"
 DOCUMENT: dict[str, object] = {
     "type": "document_url",
-    "document_url": "https://example.com/test.pdf",
+    "document_url": "data:application/pdf;base64,JVBERi0xLjQK",
 }
 FAKE_RUST_OCR_RESPONSE: dict[str, object] = {
     "pages": [{"index": 0, "markdown": "hello from rust ocr"}],
@@ -78,7 +78,7 @@ class OCRCustomGuardrail(CustomGuardrail):
         self.success_log_calls += 1
 
 
-class ExecutingRustAocrBridge:
+class MockExecutingRustAocrBridge:
     def __init__(self) -> None:
         self.calls: list[dict[str, object]] = []
 
@@ -155,7 +155,7 @@ def reset_litellm_rust_callbacks():
 
 @pytest.mark.asyncio
 async def test_rust_ocr_executes_custom_logger_from_callback_manager():
-    bridge = ExecutingRustAocrBridge()
+    bridge = MockExecutingRustAocrBridge()
     custom_logger = OCRCustomLogger()
     litellm.logging_callback_manager.add_litellm_callback(custom_logger)
     litellm.use_litellm_rust(True, aocr=bridge)
@@ -188,7 +188,7 @@ async def test_rust_ocr_executes_custom_logger_from_callback_manager():
 
 @pytest.mark.asyncio
 async def test_rust_ocr_executes_custom_guardrail_from_callback_manager():
-    bridge = ExecutingRustAocrBridge()
+    bridge = MockExecutingRustAocrBridge()
     custom_guardrail = OCRCustomGuardrail()
     litellm.logging_callback_manager.add_litellm_callback(custom_guardrail)
     litellm.use_litellm_rust(True, aocr=bridge)