diff --git a/doc/source/conf.py b/doc/source/conf.py
index 66bd075a..fe6e03ae 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -71,8 +71,8 @@ htmlhelp_basename = 'tackerclientdoc'
 # -- Options for manual page output -------------------------------------------
 
 man_pages = [
-    ('cli/index', 'tacker', u'Client for Tacker API',
-     [u'OpenStack Contributors'], 1),
+    ('cli/index', 'tacker', 'Client for Tacker API',
+     ['OpenStack Contributors'], 1),
 ]
 
 # -- Options for openstackdocstheme -------------------------------------------
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 5ad659f2..644be214 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -53,8 +53,8 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'Tacker Client Release Notes'
-copyright = u'2016, Tacker Developers'
+project = 'Tacker Client Release Notes'
+copyright = '2016, Tacker Developers'
 
 # Release notes are version independent.
 release = ''
@@ -190,8 +190,8 @@ latex_elements = {
 #  [howto/manual]).
 latex_documents = [
     ('index', 'TackerClientReleaseNotes.tex',
-     u'Tacker Client Release Notes Documentation',
-     u'Tacker Developers', 'manual'),
+     'Tacker Client Release Notes Documentation',
+     'Tacker Developers', 'manual'),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -221,8 +221,8 @@ latex_documents = [
 # (source start file, name, description, authors, manual section).
 man_pages = [
     ('index', 'tackerreleasenotes',
-     u'Tacker Client Release Notes Documentation',
-     [u'Tacker Developers'], 1)
+     'Tacker Client Release Notes Documentation',
+     ['Tacker Developers'], 1)
 ]
 
 # If true, show URL addresses after external links.
@@ -236,8 +236,8 @@ man_pages = [
 #  dir menu entry, description, category)
 texinfo_documents = [
     ('index', 'TackerClientReleaseNotes',
-     u'Tacker Client Release Notes Documentation',
-     u'Tacker Developers', 'TackerClientReleaseNotes',
+     'Tacker Client Release Notes Documentation',
+     'Tacker Developers', 'TackerClientReleaseNotes',
      'Tacker Client Project.',
      'Miscellaneous'),
 ]
diff --git a/tackerclient/osc/v1/nfvo/nsd.py b/tackerclient/osc/v1/nfvo/nsd.py
index dccc26e7..f173d2c3 100644
--- a/tackerclient/osc/v1/nfvo/nsd.py
+++ b/tackerclient/osc/v1/nfvo/nsd.py
@@ -217,7 +217,7 @@ class ShowTemplateNSD(command.ShowOne):
             obj[_NSD]['attributes']['nsd'])
         data = utils.get_item_properties(
             sdk_utils.DictModel(obj[_NSD]),
-            (u'attributes',),
+            ('attributes',),
             formatters=_formatters)
         data = (data or _('Unable to display NSD template!'))
-        return ((u'attributes',), data)
+        return (('attributes',), data)
diff --git a/tackerclient/osc/v1/nfvo/vnffgd.py b/tackerclient/osc/v1/nfvo/vnffgd.py
index f12ec83f..74cb7ebc 100644
--- a/tackerclient/osc/v1/nfvo/vnffgd.py
+++ b/tackerclient/osc/v1/nfvo/vnffgd.py
@@ -211,7 +211,7 @@ class ShowTemplateVNFFGD(command.ShowOne):
         obj = client.show_vnffgd(obj_id)
         data = utils.get_item_properties(
             sdk_utils.DictModel(obj[_VNFFGD]),
-            (u'template',),
+            ('template',),
             formatters=_formatters)
         data = (data or _('Unable to display VNFFGD template!'))
-        return ((u'template',), data)
+        return (('template',), data)
diff --git a/tackerclient/osc/v1/vnfm/vnfd.py b/tackerclient/osc/v1/vnfm/vnfd.py
index 704061e0..29295936 100644
--- a/tackerclient/osc/v1/vnfm/vnfd.py
+++ b/tackerclient/osc/v1/vnfm/vnfd.py
@@ -218,7 +218,7 @@ class ShowTemplateVNFD(command.ShowOne):
             obj[_VNFD]['attributes']['vnfd'])
         data = utils.get_item_properties(
             sdk_utils.DictModel(obj[_VNFD]),
-            (u'attributes',),
+            ('attributes',),
             formatters=_formatters)
         data = (data or _('Unable to display VNFD template!'))
-        return ((u'attributes',), data)
+        return (('attributes',), data)
diff --git a/tackerclient/tests/unit/test_cli10.py b/tackerclient/tests/unit/test_cli10.py
index ee4c7f43..d6a010fa 100644
--- a/tackerclient/tests/unit/test_cli10.py
+++ b/tackerclient/tests/unit/test_cli10.py
@@ -653,8 +653,8 @@ class CLITestV10Base(testtools.TestCase):
 class ClientV1TestJson(CLITestV10Base):
     def test_do_request_unicode(self):
         self.client.format = self.format
-        unicode_text = u'\u7f51\u7edc'
-        action = u'/test'
+        unicode_text = '\u7f51\u7edc'
+        action = '/test'
         params = {'test': unicode_text}
         body = params
         expect_body = self.client.serialize(body)
@@ -663,7 +663,7 @@ class ClientV1TestJson(CLITestV10Base):
             mock_req.return_value = (MyResp(200), expect_body)
             res_body = self.client.do_request('PUT', action, body=body,
                                               params=params)
-            expected_uri = u'localurl/v1.0/test.json?test=%E7%BD%91%E7%BB%9C'
+            expected_uri = 'localurl/v1.0/test.json?test=%E7%BD%91%E7%BB%9C'
             mock_req.assert_called_with(
                 expected_uri, 'PUT', body=expect_body,
                 headers={'X-Auth-Token': unicode_text,
diff --git a/tackerclient/tests/unit/test_shell.py b/tackerclient/tests/unit/test_shell.py
index dcaa4620..cdaaa68f 100644
--- a/tackerclient/tests/unit/test_shell.py
+++ b/tackerclient/tests/unit/test_shell.py
@@ -154,10 +154,10 @@ class ShellTest(testtools.TestCase):
     @mock.patch.object(openstack_shell.TackerShell, 'run')
     def test_main_with_unicode(self, mock_run):
         mock_run.return_value = 0
-        unicode_text = u'\u7f51\u7edc'
+        unicode_text = '\u7f51\u7edc'
         argv = ['net-list', unicode_text, unicode_text.encode('utf-8')]
         ret = openstack_shell.main(argv=argv)
-        mock_run.assert_called_once_with([u'net-list', unicode_text,
+        mock_run.assert_called_once_with(['net-list', unicode_text,
                                           unicode_text])
         self.assertEqual(0, ret)