diff --git a/tests/unit/http/test_async_http_client.py b/tests/unit/http/test_async_http_client.py
index df4360684..3bdfc4d81 100644
--- a/tests/unit/http/test_async_http_client.py
+++ b/tests/unit/http/test_async_http_client.py
@@ -1,7 +1,11 @@
 import aiounittest
 
 from aiohttp import ClientSession
-from mock import patch, AsyncMock
+try:
+    from unittest.mock import patch, AsyncMock
+except ImportError:
+    # Python 3.7
+    from mock import patch, AsyncMock
 from twilio.http.async_http_client import AsyncTwilioHttpClient
 
 
diff --git a/tests/unit/http/test_http_client.py b/tests/unit/http/test_http_client.py
index 8484e57b1..2fcbbc4ef 100644
--- a/tests/unit/http/test_http_client.py
+++ b/tests/unit/http/test_http_client.py
@@ -3,7 +3,11 @@
 import unittest
 from collections import OrderedDict
 
-from mock import Mock, patch
+try:
+    from unittest.mock import Mock, patch
+except ImportError:
+    # Python 3.7
+    from mock import Mock, patch
 from requests import Session
 
 from twilio.base.exceptions import TwilioRestException
diff --git a/tests/unit/http/test_validation_client.py b/tests/unit/http/test_validation_client.py
index 5fdd4cb9f..05473579f 100644
--- a/tests/unit/http/test_validation_client.py
+++ b/tests/unit/http/test_validation_client.py
@@ -2,7 +2,11 @@
 
 import unittest
 
-from mock import patch, Mock
+try:
+    from unittest.mock import patch, Mock
+except ImportError:
+    # Python 3.7
+    from mock import patch, Mock
 from requests import Request
 from requests import Session
 
diff --git a/tests/unit/jwt/test_jwt.py b/tests/unit/jwt/test_jwt.py
index 2f5aba62d..2cc0f9257 100644
--- a/tests/unit/jwt/test_jwt.py
+++ b/tests/unit/jwt/test_jwt.py
@@ -2,7 +2,11 @@
 import unittest
 
 import jwt as jwt_lib
-from mock import patch
+try:
+    from unittest.mock import patch
+except ImportError:
+    # Python 3.7
+    from mock import patch
 
 from twilio.jwt import Jwt, JwtDecodeError
 
diff --git a/tests/unit/rest/test_client.py b/tests/unit/rest/test_client.py
index 9623dc52a..066f1fafd 100644
--- a/tests/unit/rest/test_client.py
+++ b/tests/unit/rest/test_client.py
@@ -1,7 +1,11 @@
 import unittest
 import aiounittest
 
-from mock import AsyncMock, Mock
+try:
+    from unittest.mock import AsyncMock, Mock
+except ImportError:
+    # Python 3.7
+    from mock import AsyncMock, Mock
 from twilio.http.response import Response
 from twilio.rest import Client