diff --git a/tests/unit/http/test_async_http_client.py b/tests/unit/http/test_async_http_client.py
index 23df35dc0..a536d0120 100644
--- a/tests/unit/http/test_async_http_client.py
+++ b/tests/unit/http/test_async_http_client.py
@@ -58,6 +58,22 @@ async def test_invalid_request_timeout_raises_exception(self):
         with self.assertRaises(ValueError):
             await self.client.request("doesnt matter", "doesnt matter", timeout=-1)
 
+    async def test_request_uses_client_timeout_when_none_passed(self):
+        self.client.timeout = 30
+        await self.client.request("GET", "https://mock.twilio.com")
+
+        self.session_mock.request.assert_called()
+        request_args = self.session_mock.request.call_args.kwargs
+        self.assertEqual(request_args["timeout"], 30)
+
+    async def test_request_timeout_overrides_client_timeout(self):
+        self.client.timeout = 30
+        await self.client.request("GET", "https://mock.twilio.com", timeout=15)
+
+        self.session_mock.request.assert_called()
+        request_args = self.session_mock.request.call_args.kwargs
+        self.assertEqual(request_args["timeout"], 15)
+
 
 class TestAsyncHttpClientRetries(aiounittest.AsyncTestCase):
     def setUp(self):
diff --git a/twilio/http/async_http_client.py b/twilio/http/async_http_client.py
index ecd5d4de9..50b90d417 100644
--- a/twilio/http/async_http_client.py
+++ b/twilio/http/async_http_client.py
@@ -76,7 +76,9 @@ async def request(
 
         :return: An http response
         """
-        if timeout is not None and timeout <= 0:
+        if timeout is None:
+            timeout = self.timeout
+        elif timeout <= 0:
             raise ValueError(timeout)
 
         basic_auth = None