diff --git a/litellm/tests/test_router_init.py b/litellm/tests/test_router_init.py
index 9ab68866f0..36470d2396 100644
--- a/litellm/tests/test_router_init.py
+++ b/litellm/tests/test_router_init.py
@@ -23,6 +23,10 @@ load_dotenv()
 
 def test_init_clients():
     litellm.set_verbose = True
+    import logging
+    from litellm._logging import verbose_router_logger
+
+    verbose_router_logger.setLevel(logging.DEBUG)
     try:
         print("testing init 4 clients with diff timeouts")
         model_list = [
@@ -39,7 +43,7 @@ def test_init_clients():
                 },
             },
         ]
-        router = Router(model_list=model_list)
+        router = Router(model_list=model_list, set_verbose=True)
         for elem in router.model_list:
             model_id = elem["model_info"]["id"]
             assert router.cache.get_cache(f"{model_id}_client") is not None
@@ -55,6 +59,18 @@ def test_init_clients():
 
             assert async_client.timeout == 0.01
             assert stream_async_client.timeout == 0.000_001
+            print(vars(async_client))
+            print()
+            print(async_client._base_url)
+            assert (
+                async_client._base_url
+                == "https://openai-gpt-4-test-v-1.openai.azure.com//openai/"
+            )  # openai python adds the extra /
+            assert (
+                stream_async_client._base_url
+                == "https://openai-gpt-4-test-v-1.openai.azure.com//openai/"
+            )
+
         print("PASSED !")
 
     except Exception as e:
@@ -307,3 +323,44 @@ def test_xinference_embedding():
 
 
 # test_xinference_embedding()
+
+
+def test_router_init_gpt_4_vision_enhancements():
+    try:
+        # tests base_url set when any base_url with /openai/deployments passed to router
+        print("Testing Azure GPT_Vision enhancements")
+
+        model_list = [
+            {
+                "model_name": "gpt-4-vision-enhancements",
+                "litellm_params": {
+                    "model": "azure/gpt-4-vision",
+                    "api_key": os.getenv("AZURE_API_KEY"),
+                    "base_url": "https://gpt-4-vision-resource.openai.azure.com/openai/deployments/gpt-4-vision/extensions/",
+                },
+            }
+        ]
+
+        router = Router(model_list=model_list)
+
+        print(router.model_list)
+        print(router.model_list[0])
+
+        assert (
+            router.model_list[0]["litellm_params"]["base_url"]
+            == "https://gpt-4-vision-resource.openai.azure.com/openai/deployments/gpt-4-vision/extensions/"
+        )  # set in env
+
+        azure_client = router._get_client(
+            deployment=router.model_list[0],
+            kwargs={"stream": True, "model": "gpt-4-vision-enhancements"},
+            client_type="async",
+        )
+
+        assert (
+            azure_client._base_url
+            == "https://gpt-4-vision-resource.openai.azure.com/openai/deployments/gpt-4-vision/extensions/"
+        )
+        print("passed")
+    except Exception as e:
+        pytest.fail(f"Error occurred: {e}")