diff --git a/tests/requirements.txt b/tests/requirements.txt
index 679f8e13d..a6224c982 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -2,7 +2,6 @@ Sphinx>=1.8.0
 mock
 pytest
 pytest-cov
-aiounittest
 flake8
 wheel>=0.22.0
 cryptography
diff --git a/tests/unit/base/test_version.py b/tests/unit/base/test_version.py
index 94c0ad496..85b9fdd16 100644
--- a/tests/unit/base/test_version.py
+++ b/tests/unit/base/test_version.py
@@ -1,7 +1,6 @@
 import unittest
 from unittest.mock import Mock
 
-import aiounittest
 from tests import IntegrationTestCase
 from tests.holodeck import Request
 from twilio.base.version import Version
@@ -791,7 +790,7 @@ def test_fetch_with_response_info_returns_tuple(self):
         self.assertIsInstance(headers, dict)
 
 
-class AsyncVersionTestCase(aiounittest.AsyncTestCase):
+class AsyncVersionTestCase(unittest.IsolatedAsyncioTestCase):
     def setUp(self):
         from tests.holodeck import AsyncHolodeck
         from twilio.rest import Client
diff --git a/tests/unit/http/test_async_http_client.py b/tests/unit/http/test_async_http_client.py
index 23df35dc0..bbb89eda0 100644
--- a/tests/unit/http/test_async_http_client.py
+++ b/tests/unit/http/test_async_http_client.py
@@ -1,4 +1,4 @@
-import aiounittest
+import unittest
 
 from aiohttp import ClientSession
 from mock import patch, AsyncMock
@@ -20,7 +20,7 @@ async def text(self):
         return self._text
 
 
-class TestAsyncHttpClientRequest(aiounittest.AsyncTestCase):
+class TestAsyncHttpClientRequest(unittest.IsolatedAsyncioTestCase):
     def setUp(self):
         self.session_mock = AsyncMock(wraps=ClientSession)
         self.session_mock.request.return_value = MockResponse("test", 200)
@@ -59,7 +59,7 @@ async def test_invalid_request_timeout_raises_exception(self):
             await self.client.request("doesnt matter", "doesnt matter", timeout=-1)
 
 
-class TestAsyncHttpClientRetries(aiounittest.AsyncTestCase):
+class TestAsyncHttpClientRetries(unittest.IsolatedAsyncioTestCase):
     def setUp(self):
         self.session_mock = AsyncMock(wraps=ClientSession)
         self.session_mock.request.side_effect = [
@@ -92,7 +92,7 @@ async def test_request_retries_until_max(self):
         self.assertEqual(response.text, "Error")
 
 
-class TestAsyncHttpClientSession(aiounittest.AsyncTestCase):
+class TestAsyncHttpClientSession(unittest.IsolatedAsyncioTestCase):
     def setUp(self):
         self.session_patcher = patch("twilio.http.async_http_client.ClientSession")
         self.session_constructor_mock = self.session_patcher.start()
diff --git a/tests/unit/rest/test_client.py b/tests/unit/rest/test_client.py
index f2e2affc0..6053120f7 100644
--- a/tests/unit/rest/test_client.py
+++ b/tests/unit/rest/test_client.py
@@ -1,7 +1,5 @@
 import unittest
 
-import aiounittest
-
 from mock import AsyncMock, Mock
 
 from twilio.http.response import Response
@@ -108,7 +106,7 @@ def test_set_user_agent_extensions(self):
         self.assertEqual(user_agent_extensions, expected_user_agent_extensions)
 
 
-class TestClientAsyncRequest(aiounittest.AsyncTestCase):
+class TestClientAsyncRequest(unittest.IsolatedAsyncioTestCase):
     def setUp(self):
         self.mock_async_http_client = AsyncMock()
         self.mock_async_http_client.request.return_value = Response(200, "test")