diff --git a/test-requirements.txt b/test-requirements.txt
index 53b3732..a26ae65 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,7 +5,7 @@
 
 bandit>=1.1.0 # Apache-2.0
 Babel!=2.4.0,>=2.3.4 # BSD
-hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
+hacking>=1.1.0,<1.2.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 mock>=2.0.0 # BSD
 funcsigs>=1.0.0;python_version=='2.7' or python_version=='2.6' # Apache-2.0
diff --git a/tests/test_email_notification.py b/tests/test_email_notification.py
index f108a8b..5935829 100644
--- a/tests/test_email_notification.py
+++ b/tests/test_email_notification.py
@@ -16,15 +16,18 @@
 # limitations under the License.
 
 import base64
+import datetime
 import email.header
-import mock
 import smtplib
 import socket
 import time
 
+import mock
 import six
 
-import datetime
+from monasca_notification.notification import Notification
+from monasca_notification.plugins import email_notifier
+from tests import base
 
 if six.PY2:
     import urlparse
@@ -32,10 +35,6 @@ else:
     from urllib import parse
     from urllib.parse import urlparse
 
-from monasca_notification.notification import Notification
-from monasca_notification.plugins import email_notifier
-from tests import base
-
 UNICODE_CHAR = six.unichr(2344)
 UNICODE_CHAR_ENCODED = UNICODE_CHAR.encode("utf-8")