diff --git a/litellm/integrations/rubrik.py b/litellm/integrations/rubrik.py
index e901ec5fbb7..299e95eb813 100644
--- a/litellm/integrations/rubrik.py
+++ b/litellm/integrations/rubrik.py
@@ -320,12 +320,8 @@ class RubrikLogger(CustomGuardrail, CustomBatchLogger):
                         "content": system_prompt_msg_list,
                     }
                     if isinstance(standard_logging_payload["messages"], list):
-                        standard_logging_payload["messages"].insert(
-                            0, system_scaffold
-                        )
-                    elif isinstance(
-                        standard_logging_payload["messages"], (dict, str)
-                    ):
+                        standard_logging_payload["messages"].insert(0, system_scaffold)
+                    elif isinstance(standard_logging_payload["messages"], (dict, str)):
                         standard_logging_payload["messages"] = [
                             system_scaffold,
                             standard_logging_payload["messages"],
@@ -355,14 +351,10 @@ class RubrikLogger(CustomGuardrail, CustomBatchLogger):
                 exc_info=True,
             )
 
-    async def async_log_success_event(
-        self, kwargs, response_obj, start_time, end_time
-    ):
+    async def async_log_success_event(self, kwargs, response_obj, start_time, end_time):
         await self._enqueue_log_event(kwargs, "success")
 
-    async def async_log_failure_event(
-        self, kwargs, response_obj, start_time, end_time
-    ):
+    async def async_log_failure_event(self, kwargs, response_obj, start_time, end_time):
         await self._enqueue_log_event(kwargs, "failure")
 
     # -- Batch logging ---------------------------------------------------------
diff --git a/litellm/llms/bedrock/chat/invoke_transformations/anthropic_claude3_transformation.py b/litellm/llms/bedrock/chat/invoke_transformations/anthropic_claude3_transformation.py
index d6c5aacc35d..9e8467fe394 100644
--- a/litellm/llms/bedrock/chat/invoke_transformations/anthropic_claude3_transformation.py
+++ b/litellm/llms/bedrock/chat/invoke_transformations/anthropic_claude3_transformation.py
@@ -170,7 +170,9 @@ class AmazonAnthropicClaudeConfig(AmazonInvokeConfig, AnthropicConfig):
         anthropic_request.pop("model", None)
         anthropic_request.pop("stream", None)
         anthropic_request.pop("output_format", None)
-        if not _supports_factory(model=model, custom_llm_provider=None, key="supports_output_config"):
+        if not _supports_factory(
+            model=model, custom_llm_provider=None, key="supports_output_config"
+        ):
             anthropic_request.pop("output_config", None)
         if "anthropic_version" not in anthropic_request:
             anthropic_request["anthropic_version"] = self.anthropic_version
diff --git a/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py b/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py
index abb1920cc08..f5b0659068c 100644
--- a/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py
+++ b/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py
@@ -504,7 +504,9 @@ class AmazonAnthropicClaudeMessagesConfig(
         # 5b. Bedrock Invoke supports output_config (effort) for Claude 4.6+ models,
         # but older models do not — strip it to avoid request rejection.
         # Ref: https://github.com/BerriAI/litellm/issues/22797
-        if not _supports_factory(model=model, custom_llm_provider=None, key="supports_output_config"):
+        if not _supports_factory(
+            model=model, custom_llm_provider=None, key="supports_output_config"
+        ):
             anthropic_messages_request.pop("output_config", None)
 
         # 5a. Remove `custom` field from tools (Bedrock doesn't support it)
diff --git a/tests/test_litellm/integrations/rubrik_test_helpers.py b/tests/test_litellm/integrations/rubrik_test_helpers.py
index 1bdb8cb247b..f33d4413ddd 100644
--- a/tests/test_litellm/integrations/rubrik_test_helpers.py
+++ b/tests/test_litellm/integrations/rubrik_test_helpers.py
@@ -5,9 +5,7 @@ from typing import Any, Dict
 from litellm.types.utils import GenericGuardrailAPIInputs
 
 
-def make_tool_call_dict(
-    tc_id: str, name: str, arguments: str = "{}"
-) -> Dict[str, Any]:
+def make_tool_call_dict(tc_id: str, name: str, arguments: str = "{}") -> Dict[str, Any]:
     """Create a tool call dict matching the ChatCompletionMessageToolCall schema."""
     return {
         "id": tc_id,
diff --git a/tests/test_litellm/integrations/test_rubrik.py b/tests/test_litellm/integrations/test_rubrik.py
index d543516f183..162a9e44335 100644
--- a/tests/test_litellm/integrations/test_rubrik.py
+++ b/tests/test_litellm/integrations/test_rubrik.py
@@ -58,9 +58,7 @@ class TestInitialization:
 
     def test_init_with_constructor_params(self):
         with patch("asyncio.create_task", Mock()):
-            handler = RubrikLogger(
-                api_key="ctor-key", api_base="http://ctor-host:9090"
-            )
+            handler = RubrikLogger(api_key="ctor-key", api_base="http://ctor-host:9090")
             assert handler.key == "ctor-key"
             assert (
                 handler.tool_blocking_endpoint
@@ -152,9 +150,7 @@ class TestInitialization:
         assert handler._headers["Content-Type"] == "application/json"
 
     def test_headers_without_api_key(self):
-        with patch.dict(
-            os.environ, {"RUBRIK_WEBHOOK_URL": "http://host"}, clear=True
-        ):
+        with patch.dict(os.environ, {"RUBRIK_WEBHOOK_URL": "http://host"}, clear=True):
             with patch("asyncio.create_task", Mock()):
                 h = RubrikLogger()
                 assert "Authorization" not in h._headers
@@ -351,9 +347,7 @@ def _echo_service():
 @pytest.mark.asyncio
 class TestApplyGuardrail:
     async def test_skips_requests(self, handler):
-        inputs = make_inputs_with_tools(
-            [make_tool_call_dict("call_1", "test_tool")]
-        )
+        inputs = make_inputs_with_tools([make_tool_call_dict("call_1", "test_tool")])
         result = await handler.apply_guardrail(
             inputs=inputs, request_data={}, input_type="request"
         )
@@ -464,9 +458,7 @@ class TestApplyGuardrail:
 
     async def test_blocking_service_payload_format(self, handler):
         tc1 = make_tool_call_dict("call_1", "get_weather", '{"location": "SF"}')
-        tc2 = make_tool_call_dict(
-            "call_2", "send_email", '{"to": "user@example.com"}'
-        )
+        tc2 = make_tool_call_dict("call_2", "send_email", '{"to": "user@example.com"}')
         inputs = make_inputs_with_tools([tc1, tc2])
 
         captured_payload: Dict[str, Any] = {}
@@ -605,9 +597,7 @@ class TestApplyGuardrailAnthropicFormat:
         inputs = make_inputs_with_tools([tc])
 
         mock_client = AsyncMock()
-        mock_client.post = AsyncMock(
-            side_effect=httpx.TimeoutException("Timeout")
-        )
+        mock_client.post = AsyncMock(side_effect=httpx.TimeoutException("Timeout"))
         handler.tool_blocking_client = mock_client
 
         result = await handler.apply_guardrail(
@@ -728,5 +718,7 @@ class TestResolveModel:
 
         response = Mock()
         response.model = ""
-        result = RubrikLogger._resolve_model({"response": response}, {"model": "fallback"})
+        result = RubrikLogger._resolve_model(
+            {"response": response}, {"model": "fallback"}
+        )
         assert result == "unknown"
diff --git a/tests/test_litellm/llms/bedrock/messages/invoke_transformations/test_anthropic_claude3_transformation.py b/tests/test_litellm/llms/bedrock/messages/invoke_transformations/test_anthropic_claude3_transformation.py
index a8042c22178..f1e7de23315 100644
--- a/tests/test_litellm/llms/bedrock/messages/invoke_transformations/test_anthropic_claude3_transformation.py
+++ b/tests/test_litellm/llms/bedrock/messages/invoke_transformations/test_anthropic_claude3_transformation.py
@@ -702,7 +702,10 @@ async def test_promote_message_start_cache_when_message_stop_omits_cache_fields(
             "delta": {"stop_reason": "end_turn", "stop_sequence": None},
             "usage": {"input_tokens": 10, "output_tokens": 181},
         }
-        yield {"type": "message_stop", "usage": {"input_tokens": 10, "output_tokens": 181}}
+        yield {
+            "type": "message_stop",
+            "usage": {"input_tokens": 10, "output_tokens": 181},
+        }
 
     merged: list[dict] = []
     async for chunk in cfg._promote_message_stop_usage(_stream()):
@@ -756,7 +759,11 @@ async def test_unified_bedrock_messages_cache_on_start_only_never_negative_cost(
                 },
             },
         }
-        yield {"type": "content_block_start", "index": 0, "content_block": {"type": "text", "text": ""}}
+        yield {
+            "type": "content_block_start",
+            "index": 0,
+            "content_block": {"type": "text", "text": ""},
+        }
         yield {
             "type": "content_block_delta",
             "index": 0,
@@ -768,7 +775,10 @@ async def test_unified_bedrock_messages_cache_on_start_only_never_negative_cost(
             "delta": {"stop_reason": "end_turn", "stop_sequence": None},
             "usage": {"output_tokens": 181, "input_tokens": 10},
         }
-        yield {"type": "message_stop", "usage": {"input_tokens": 10, "output_tokens": 181}}
+        yield {
+            "type": "message_stop",
+            "usage": {"input_tokens": 10, "output_tokens": 181},
+        }
 
     logging_obj = LiteLLMLoggingObj(
         model="bedrock/anthropic.claude-3-5-sonnet-20240620-v1:0",