diff --git a/monascaclient/tests/test_shell.py b/monascaclient/tests/test_shell.py
index 76a9f93..267a6f0 100644
--- a/monascaclient/tests/test_shell.py
+++ b/monascaclient/tests/test_shell.py
@@ -1,4 +1,4 @@
-# (C) Copyright 2014-2016 Hewlett Packard Enterprise Development Company LP
+# (C) Copyright 2014-2016 Hewlett Packard Enterprise Development LP
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -279,6 +279,66 @@ class ShellTestMonascaCommands(ShellBase):
             retvalue = self.shell(argstr)
             self.assertRegexpMatches(retvalue, "id")
 
+    def test_good_notifications_patch(self):
+        self._script_keystone_client()
+
+        id_str = '0495340b-58fd-4e1c-932b-5e6f9cc96490'
+        resp = fakes.FakeHTTPResponse(
+            201,
+            'Created',
+            {'location': 'http://no.where/v2.0/notification-methods'},
+            None)
+        http.HTTPClient.json_request(
+            'PATCH',
+            '/notification-methods/' + id_str,
+            data={'type': 'EMAIL',
+                  'address': 'john.doe@hpe.com',
+                  'period': 0},
+            headers={'X-Auth-Key': 'password',
+                     'X-Auth-User': 'username'}).AndReturn((resp, 'id'))
+        self.m.ReplayAll()
+
+        argstring = 'notification-patch {0} --type EMAIL --address' \
+                    ' john.doe@hpe.com --period 0'.format(id_str)
+        retvalue = self.shell(argstring)
+        self.assertRegexpMatches(retvalue, "id")
+
+    def test_bad_notifications_patch(self):
+        self._script_keystone_client()
+
+        id_str = '0495340b-58fd-4e1c-932b-5e6f9cc96490'
+        argstring = 'notification-patch {0} --type EMAIL --address' \
+                    ' john.doe@hpe.com --period 60'.format(id_str)
+        self.m.ReplayAll()
+
+        retvalue = self.shell(argstring)
+        self.assertRegexpMatches(retvalue, "^Invalid")
+
+    def test_good_notifications_update(self):
+        self._script_keystone_client()
+
+        id_str = '0495340b-58fd-4e1c-932b-5e6f9cc96491'
+        resp = fakes.FakeHTTPResponse(
+            201,
+            'Created',
+            {'location': 'http://no.where/v2.0/notification-methods'},
+            None)
+        http.HTTPClient.json_request(
+            'PUT',
+            '/notification-methods/' + id_str,
+            data={'name': 'notification_updated_name',
+                  'type': 'EMAIL',
+                  'address': 'john.doe@hpe.com',
+                  'period': 0},
+            headers={'X-Auth-Key': 'password',
+                     'X-Auth-User': 'username'}).AndReturn((resp, 'id'))
+        self.m.ReplayAll()
+
+        argstring = 'notification-update {0} notification_updated_name ' \
+                    'EMAIL john.doe@hpe.com 0'.format(id_str)
+        retvalue = self.shell(argstring)
+        self.assertRegexpMatches(retvalue, "id")
+
     def test_good_alarm_definition_update(self):
         self._script_keystone_client()
 
diff --git a/monascaclient/v2_0/shell.py b/monascaclient/v2_0/shell.py
index a8f3333..09541a0 100644
--- a/monascaclient/v2_0/shell.py
+++ b/monascaclient/v2_0/shell.py
@@ -1,4 +1,4 @@
-# (C) Copyright 2014-2016 Hewlett Packard Enterprise Development Company LP
+# (C) Copyright 2014-2016 Hewlett Packard Enterprise Development LP
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -693,7 +693,7 @@ def do_notification_patch(mc, args):
         fields['type'] = args.type
     if args.address:
         fields['address'] = args.address
-    if args.period:
+    if args.period or args.period == 0:
         if args.type and not _validate_notification_period(
                 args.period, args.type.upper()):
             return