diff --git a/heatclient/tests/test_common_http.py b/heatclient/tests/test_common_http.py
index 4e0c59a5..93983479 100644
--- a/heatclient/tests/test_common_http.py
+++ b/heatclient/tests/test_common_http.py
@@ -11,12 +11,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mox
 import testtools
 
 from heatclient.common import http
 from heatclient import exc
 from heatclient.tests import fakes
+from mox3 import mox
 
 
 class HttpClientTest(testtools.TestCase):
diff --git a/heatclient/tests/test_shell.py b/heatclient/tests/test_shell.py
index 0165bb04..f90eceda 100644
--- a/heatclient/tests/test_shell.py
+++ b/heatclient/tests/test_shell.py
@@ -20,11 +20,12 @@ import urllib2
 import yaml
 
 import fixtures
-import mox
 import tempfile
 import testscenarios
 import testtools
 
+from mox3 import mox
+
 try:
     import json
 except ImportError:
diff --git a/test-requirements.txt b/test-requirements.txt
index e3e6346e..c18f5ee9 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,6 +8,7 @@ discover
 fixtures>=0.3.14
 mock>=1.0
 mox>=0.5.3
+mox3>=0.7.0
 sphinx>=1.1.2
 testscenarios>=0.4
 testrepository>=0.0.17