diff --git a/litellm/secret_managers/main.py b/litellm/secret_managers/main.py
index a093fe2d2fd..38405f058c3 100644
--- a/litellm/secret_managers/main.py
+++ b/litellm/secret_managers/main.py
@@ -17,6 +17,22 @@
 oidc_cache = DualCache()
 
 
+def _get_oidc_http_handler(timeout: Optional[httpx.Timeout] = None) -> HTTPHandler:
+    """
+    Factory function to create HTTPHandler for OIDC requests.
+    This function can be mocked in tests.
+    
+    Args:
+        timeout: Optional timeout for HTTP requests. Defaults to 600.0 seconds with 5.0 connect timeout.
+    
+    Returns:
+        HTTPHandler instance configured for OIDC requests.
+    """
+    if timeout is None:
+        timeout = httpx.Timeout(timeout=600.0, connect=5.0)
+    return HTTPHandler(timeout=timeout)
+
+
 ######### Secret Manager ############################
 # checks if user has passed in a secret manager client
 # if passed in then checks the secret there
@@ -103,7 +119,7 @@ def get_secret(  # noqa: PLR0915
             if oidc_token is not None:
                 return oidc_token
 
-            oidc_client = HTTPHandler(timeout=httpx.Timeout(timeout=600.0, connect=5.0))
+            oidc_client = _get_oidc_http_handler()
             # https://cloud.google.com/compute/docs/instances/verifying-instance-identity#request_signature
             response = oidc_client.get(
                 "http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/identity",
@@ -141,7 +157,7 @@ def get_secret(  # noqa: PLR0915
             if oidc_token is not None:
                 return oidc_token
 
-            oidc_client = HTTPHandler(timeout=httpx.Timeout(timeout=600.0, connect=5.0))
+            oidc_client = _get_oidc_http_handler()
             response = oidc_client.get(
                 actions_id_token_request_url,
                 params={"audience": oidc_aud},
diff --git a/tests/test_litellm/containers/test_container_integration.py b/tests/test_litellm/containers/test_container_integration.py
index e83ae921c19..d36918c63b9 100644
--- a/tests/test_litellm/containers/test_container_integration.py
+++ b/tests/test_litellm/containers/test_container_integration.py
@@ -357,15 +357,15 @@ def test_container_workflow_simulation(self):
 
     def test_error_handling_integration(self):
         """Test error handling in the integration flow."""
-        with patch('litellm.containers.main.base_llm_http_handler') as mock_handler:
-            # Simulate an API error
-            mock_handler.container_create_handler.side_effect = litellm.APIError(
-                status_code=400,
-                message="API Error occurred", 
-                llm_provider="openai",
-                model=""
-            )
-            
+        # Simulate an API error
+        api_error = litellm.APIError(
+            status_code=400,
+            message="API Error occurred", 
+            llm_provider="openai",
+            model=""
+        )
+        
+        with patch.object(litellm.main.base_llm_http_handler, 'container_create_handler', side_effect=api_error):
             with pytest.raises(litellm.APIError):
                 create_container(
                     name="Error Test Container",
@@ -385,12 +385,12 @@ def test_provider_support(self, provider):
             name="Provider Test Container"
         )
         
-        with patch('litellm.containers.main.base_llm_http_handler') as mock_handler:
-            mock_handler.container_create_handler.return_value = mock_response
-            
+        with patch.object(litellm.main.base_llm_http_handler, 'container_create_handler', return_value=mock_response) as mock_handler:
             response = create_container(
                 name="Provider Test Container",
                 custom_llm_provider=provider
             )
             
             assert response.name == "Provider Test Container"
+            # Verify the mock was actually called (not making real API calls)
+            mock_handler.assert_called_once()
diff --git a/tests/test_litellm/secret_managers/test_secret_managers_main.py b/tests/test_litellm/secret_managers/test_secret_managers_main.py
index 2e5270b5d70..9246b2a9ef8 100644
--- a/tests/test_litellm/secret_managers/test_secret_managers_main.py
+++ b/tests/test_litellm/secret_managers/test_secret_managers_main.py
@@ -47,11 +47,11 @@ def mock_env():
 
 
 @patch("litellm.secret_managers.main.oidc_cache")
-@patch("litellm.secret_managers.main.HTTPHandler")
-def test_oidc_google_success(mock_http_handler, mock_oidc_cache):
+@patch("litellm.secret_managers.main._get_oidc_http_handler")
+def test_oidc_google_success(mock_get_http_handler, mock_oidc_cache):
     mock_oidc_cache.get_cache.return_value = None
     mock_handler = MockHTTPHandler(timeout=600.0)
-    mock_http_handler.return_value = mock_handler
+    mock_get_http_handler.return_value = mock_handler
     secret_name = "oidc/google/[invalid url, do not cite]"
     result = get_secret(secret_name)
 
@@ -67,12 +67,12 @@ def test_oidc_google_cached(mock_oidc_cache):
     mock_oidc_cache.get_cache.return_value = "cached_token"
 
     secret_name = "oidc/google/[invalid url, do not cite]"
-    with patch("litellm.secret_managers.main.HTTPHandler") as mock_http:
+    with patch("litellm.secret_managers.main._get_oidc_http_handler") as mock_get_http:
         result = get_secret(secret_name)
 
         assert result == "cached_token", f"Expected cached token, got {result}"
         mock_oidc_cache.get_cache.assert_called_with(key=secret_name)
-        mock_http.assert_not_called()
+        mock_get_http.assert_not_called()
 
 
 @patch("litellm.secret_managers.main.oidc_cache")
@@ -80,7 +80,7 @@ def test_oidc_google_failure(mock_oidc_cache):
     mock_handler = MockHTTPHandler(timeout=600.0)
     mock_handler.status_code = 400
 
-    with patch("litellm.secret_managers.main.HTTPHandler", return_value=mock_handler):
+    with patch("litellm.secret_managers.main._get_oidc_http_handler", return_value=mock_handler):
         mock_oidc_cache.get_cache.return_value = None
         secret_name = "oidc/google/https://example.com/api"
 
@@ -106,13 +106,13 @@ def test_oidc_circleci_failure(monkeypatch):
 
 
 @patch("litellm.secret_managers.main.oidc_cache")
-@patch("litellm.secret_managers.main.HTTPHandler")
-def test_oidc_github_success(mock_http_handler, mock_oidc_cache, mock_env):
+@patch("litellm.secret_managers.main._get_oidc_http_handler")
+def test_oidc_github_success(mock_get_http_handler, mock_oidc_cache, mock_env):
     mock_env["ACTIONS_ID_TOKEN_REQUEST_URL"] = "https://github.com/token"
     mock_env["ACTIONS_ID_TOKEN_REQUEST_TOKEN"] = "github_token"
     mock_oidc_cache.get_cache.return_value = None
     mock_handler = MockHTTPHandler(timeout=600.0)
-    mock_http_handler.return_value = mock_handler
+    mock_get_http_handler.return_value = mock_handler
 
     secret_name = "oidc/github/github-audience"
     result = get_secret(secret_name)
diff --git a/tests/test_litellm/test_main.py b/tests/test_litellm/test_main.py
index d1185c72a29..80fd9f61298 100644
--- a/tests/test_litellm/test_main.py
+++ b/tests/test_litellm/test_main.py
@@ -477,6 +477,12 @@ async def test_openai_env_base(
     respx_mock: respx.MockRouter, env_base, openai_api_response, monkeypatch
 ):
     "This tests OpenAI env variables are honored, including legacy OPENAI_API_BASE"
+    # Clear cache to ensure no cached clients from previous tests interfere
+    # This prevents cache pollution where a previous test cached a client with
+    # aiohttp transport, which would bypass respx mocks
+    if hasattr(litellm, "in_memory_llm_clients_cache"):
+        litellm.in_memory_llm_clients_cache.flush_cache()
+    
     # Ensure aiohttp transport is disabled to use httpx which respx can mock
     litellm.disable_aiohttp_transport = True