diff --git a/tests/pass_through_unit_tests/messages_api_structured_output/base_anthropic_messages_structured_output_test.py b/tests/pass_through_unit_tests/messages_api_structured_output/base_anthropic_messages_structured_output_test.py
index e1df80c48e1..9346345eef6 100644
--- a/tests/pass_through_unit_tests/messages_api_structured_output/base_anthropic_messages_structured_output_test.py
+++ b/tests/pass_through_unit_tests/messages_api_structured_output/base_anthropic_messages_structured_output_test.py
@@ -9,7 +9,7 @@ import json
 import os
 import sys
 from abc import ABC, abstractmethod
-from typing import Any, Dict, List
+from typing import Any, Dict, List, Optional
 
 sys.path.insert(0, os.path.abspath("../../.."))
 
@@ -23,6 +23,10 @@ class BaseAnthropicMessagesStructuredOutputTest(ABC):
 
     Subclasses must implement:
     - get_model(): Returns the model string to use for tests
+
+    Subclasses may optionally implement:
+    - get_api_base(): Returns the API base URL (for Azure, etc.)
+    - get_api_key(): Returns the API key (for Azure, etc.)
     """
 
     @abstractmethod
@@ -32,6 +36,18 @@ class BaseAnthropicMessagesStructuredOutputTest(ABC):
         """
         pass
 
+    def get_api_base(self) -> Optional[str]:
+        """
+        Returns the API base URL. Override for providers like Azure.
+        """
+        return None
+
+    def get_api_key(self) -> Optional[str]:
+        """
+        Returns the API key. Override for providers like Azure.
+        """
+        return None
+
     def get_output_format_schema(self) -> Dict[str, Any]:
         """
         Returns a simple JSON schema for testing structured outputs.
@@ -71,12 +87,23 @@ class BaseAnthropicMessagesStructuredOutputTest(ABC):
         messages = self.get_test_messages()
         output_format = self.get_output_format_schema()
 
-        response = await litellm.anthropic.messages.acreate(
-            model=self.get_model(),
-            messages=messages,
-            max_tokens=100,
-            output_format=output_format,
-        )
+        # Build kwargs with optional api_base and api_key
+        kwargs: Dict[str, Any] = {
+            "model": self.get_model(),
+            "messages": messages,
+            "max_tokens": 100,
+            "output_format": output_format,
+        }
+
+        api_base = self.get_api_base()
+        if api_base:
+            kwargs["api_base"] = api_base
+
+        api_key = self.get_api_key()
+        if api_key:
+            kwargs["api_key"] = api_key
+
+        response = await litellm.anthropic.messages.acreate(**kwargs)
 
         print(f"Response: {response}")
 
diff --git a/tests/pass_through_unit_tests/messages_api_structured_output/test_azure_anthropic_structured_output.py b/tests/pass_through_unit_tests/messages_api_structured_output/test_azure_anthropic_structured_output.py
index 815e9a2e198..96233d715ca 100644
--- a/tests/pass_through_unit_tests/messages_api_structured_output/test_azure_anthropic_structured_output.py
+++ b/tests/pass_through_unit_tests/messages_api_structured_output/test_azure_anthropic_structured_output.py
@@ -9,6 +9,7 @@ Requires Azure AI credentials and model deployment.
 
 import os
 import sys
+from typing import Optional
 
 sys.path.insert(0, os.path.abspath("../../../.."))
 
@@ -26,4 +27,10 @@ class TestAzureAnthropicStructuredOutput(BaseAnthropicMessagesStructuredOutputTe
     """
 
     def get_model(self) -> str:
-        return "azure_ai/claude-3-5-sonnet-20241022"
\ No newline at end of file
+        return "azure_ai/claude-haiku-4-5"
+
+    def get_api_base(self) -> Optional[str]:
+        return "https://krish-mh44t553-eastus2.services.ai.azure.com/"
+
+    def get_api_key(self) -> Optional[str]:
+        return os.environ.get("AZURE_ANTHROPIC_API_KEY")
\ No newline at end of file