diff --git a/designateclient/client.py b/designateclient/client.py
index 03564cba..7db867f5 100644
--- a/designateclient/client.py
+++ b/designateclient/client.py
@@ -24,7 +24,7 @@ from oslo_serialization import jsonutils
 from designateclient import exceptions
 
 
-class Controller(object, metaclass=abc.ABCMeta):
+class Controller(metaclass=abc.ABCMeta):
 
     def __init__(self, client):
         self.client = client
@@ -38,10 +38,10 @@ class Controller(object, metaclass=abc.ABCMeta):
             params['limit'] = limit
 
         q = parse.urlencode(params) if params else ''
-        return '%(url)s%(params)s' % {
-            'url': url,
-            'params': '?%s' % q
-        }
+        return '{url}{params}'.format(
+            url=url,
+            params=f'?{q}'
+        )
 
     def _serialize(self, kwargs):
         headers = kwargs.get('headers')
@@ -122,13 +122,14 @@ class CrudController(Controller, metaclass=abc.ABCMeta):
 
 def get_versions():
     mgr = extension.ExtensionManager('designateclient.versions')
-    return dict([(ep.name, ep.plugin) for ep in mgr.extensions])
+    return {ep.name: ep.plugin for ep in mgr.extensions}
 
 
 def Client(version, *args, **kwargs):  # noqa
     versions = get_versions()
     if version not in versions:
-        msg = 'Version %s is not supported, use one of (%s)' % (
-            version, list(versions.keys()))
+        msg = 'Version {} is not supported, use one of ({})'.format(
+            version, list(versions.keys())
+        )
         raise exceptions.UnsupportedVersion(msg)
     return versions[version](*args, **kwargs)
diff --git a/designateclient/exceptions.py b/designateclient/exceptions.py
index e220b972..d1ebbcbf 100644
--- a/designateclient/exceptions.py
+++ b/designateclient/exceptions.py
@@ -19,7 +19,7 @@ class Base(Exception):
     def __init__(self, message=None):
         if not message:
             message = self.__class__.__name__
-        super(Base, self).__init__(message)
+        super().__init__(message)
 
 
 class UnsupportedVersion(Base):
@@ -44,7 +44,7 @@ class RemoteError(Base):
         self.errors = errors
         self.request_id = request_id
 
-        super(RemoteError, self).__init__(err_message)
+        super().__init__(err_message)
 
     def _get_error_message(self, _message, _type, _errors):
         # Try to get a useful error msg if 'message' has nothing
diff --git a/designateclient/functionaltests/client.py b/designateclient/functionaltests/client.py
index 6edf3773..dd0a309c 100644
--- a/designateclient/functionaltests/client.py
+++ b/designateclient/functionaltests/client.py
@@ -45,7 +45,7 @@ def build_option_string(options):
 
         "--email 'me@example.com' --name 'example.com.'
     """
-    return " ".join("{0} '{1}'".format(flag, value)
+    return " ".join(f"{flag} '{value}'"
                     for flag, value in options.items()
                     if value is not None)
 
@@ -72,18 +72,18 @@ def build_flags_string(flags):
     return " ".join(flags.keys())
 
 
-class ZoneCommands(object):
+class ZoneCommands:
     """This is a mixin that provides zone commands to DesignateCLI"""
 
     def zone_list(self, *args, **kwargs):
         return self.parsed_cmd('zone list', ListModel, *args, **kwargs)
 
     def zone_show(self, id, *args, **kwargs):
-        return self.parsed_cmd('zone show %s' % id, FieldValueModel, *args,
+        return self.parsed_cmd(f'zone show {id}', FieldValueModel, *args,
                                **kwargs)
 
     def zone_delete(self, id, *args, **kwargs):
-        return self.parsed_cmd('zone delete %s' % id, FieldValueModel, *args,
+        return self.parsed_cmd(f'zone delete {id}', FieldValueModel, *args,
                                **kwargs)
 
     def zone_create(self, name, email=None, ttl=None, description=None,
@@ -95,7 +95,7 @@ class ZoneCommands(object):
             "--masters": masters,
             "--type": type,
         })
-        cmd = 'zone create {0} {1}'.format(name, options_str)
+        cmd = f'zone create {name} {options_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_set(self, id, email=None, ttl=None, description=None,
@@ -107,11 +107,11 @@ class ZoneCommands(object):
             "--masters": masters,
             "--type": type,
         })
-        cmd = 'zone set {0} {1}'.format(id, options_str)
+        cmd = f'zone set {id} {options_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
 
-class ZoneTransferCommands(object):
+class ZoneTransferCommands:
     """A mixin for DesignateCLI to add zone transfer commands"""
 
     def zone_transfer_request_list(self, *args, **kwargs):
@@ -124,21 +124,20 @@ class ZoneTransferCommands(object):
             "--target-project-id": target_project_id,
             "--description": description,
         })
-        cmd = 'zone transfer request create {0} {1}'.format(
-            zone_id, options_str)
+        cmd = f'zone transfer request create {zone_id} {options_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_transfer_request_show(self, id, *args, **kwargs):
-        cmd = 'zone transfer request show {0}'.format(id)
+        cmd = f'zone transfer request show {id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_transfer_request_set(self, id, description=None, *args, **kwargs):
         options_str = build_option_string({"--description": description})
-        cmd = 'zone transfer request set {0} {1}'.format(options_str, id)
+        cmd = f'zone transfer request set {options_str} {id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_transfer_request_delete(self, id, *args, **kwargs):
-        cmd = 'zone transfer request delete {0}'.format(id)
+        cmd = f'zone transfer request delete {id}'
         return self.parsed_cmd(cmd, *args, **kwargs)
 
     def zone_transfer_accept_request(self, id, key, *args, **kwargs):
@@ -146,11 +145,11 @@ class ZoneTransferCommands(object):
             "--transfer-id": id,
             "--key": key,
         })
-        cmd = 'zone transfer accept request {0}'.format(options_str)
+        cmd = f'zone transfer accept request {options_str}'
         return self.parsed_cmd(cmd, *args, **kwargs)
 
     def zone_transfer_accept_show(self, id, *args, **kwargs):
-        cmd = 'zone transfer accept show {0}'.format(id)
+        cmd = f'zone transfer accept show {id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_transfer_accept_list(self, *args, **kwargs):
@@ -158,7 +157,7 @@ class ZoneTransferCommands(object):
         return self.parsed_cmd(cmd, ListModel, *args, **kwargs)
 
 
-class ZoneExportCommands(object):
+class ZoneExportCommands:
     """A mixin for DesignateCLI to add zone export commands"""
 
     def zone_export_list(self, *args, **kwargs):
@@ -166,24 +165,23 @@ class ZoneExportCommands(object):
         return self.parsed_cmd(cmd, ListModel, *args, **kwargs)
 
     def zone_export_create(self, zone_id, *args, **kwargs):
-        cmd = 'zone export create {0}'.format(
-            zone_id)
+        cmd = f'zone export create {zone_id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_export_show(self, zone_export_id, *args, **kwargs):
-        cmd = 'zone export show {0}'.format(zone_export_id)
+        cmd = f'zone export show {zone_export_id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_export_delete(self, zone_export_id, *args, **kwargs):
-        cmd = 'zone export delete {0}'.format(zone_export_id)
+        cmd = f'zone export delete {zone_export_id}'
         return self.parsed_cmd(cmd, *args, **kwargs)
 
     def zone_export_showfile(self, zone_export_id, *args, **kwargs):
-        cmd = 'zone export showfile {0}'.format(zone_export_id)
+        cmd = f'zone export showfile {zone_export_id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
 
-class ZoneImportCommands(object):
+class ZoneImportCommands:
     """A mixin for DesignateCLI to add zone import commands"""
 
     def zone_import_list(self, *args, **kwargs):
@@ -191,26 +189,26 @@ class ZoneImportCommands(object):
         return self.parsed_cmd(cmd, ListModel, *args, **kwargs)
 
     def zone_import_create(self, zone_file_path, *args, **kwargs):
-        cmd = 'zone import create {0}'.format(zone_file_path)
+        cmd = f'zone import create {zone_file_path}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_import_show(self, zone_import_id, *args, **kwargs):
-        cmd = 'zone import show {0}'.format(zone_import_id)
+        cmd = f'zone import show {zone_import_id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_import_delete(self, zone_import_id, *args, **kwargs):
-        cmd = 'zone import delete {0}'.format(zone_import_id)
+        cmd = f'zone import delete {zone_import_id}'
         return self.parsed_cmd(cmd, *args, **kwargs)
 
 
-class RecordsetCommands(object):
+class RecordsetCommands:
 
     def recordset_show(self, zone_id, id, *args, **kwargs):
-        cmd = 'recordset show {0} {1}'.format(zone_id, id)
+        cmd = f'recordset show {zone_id} {id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def recordset_list(self, zone_id, *args, **kwargs):
-        cmd = 'recordset list {0}'.format(zone_id)
+        cmd = f'recordset list {zone_id}'
         return self.parsed_cmd(cmd, ListModel, *args, **kwargs)
 
     def recordset_create(self, zone_id, name, records=None, type=None,
@@ -221,7 +219,7 @@ class RecordsetCommands(object):
             '--description': description,
             '--ttl': ttl,
         })
-        cmd = 'recordset create {0} {1} {2}'.format(zone_id, name, options_str)
+        cmd = f'recordset create {zone_id} {name} {options_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def recordset_set(self, zone_id, id, records=None, type=None,
@@ -237,33 +235,32 @@ class RecordsetCommands(object):
             '--no-description': no_description,
             '--no-ttl': no_ttl,
         })
-        cmd = 'recordset set {0} {1} {2} {3}'.format(
-            zone_id, id, flags_str, options_str)
+        cmd = f'recordset set {zone_id} {id} {flags_str} {options_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def recordset_delete(self, zone_id, id, *args, **kwargs):
-        cmd = 'recordset delete {0} {1}'.format(zone_id, id)
+        cmd = f'recordset delete {zone_id} {id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
 
-class TLDCommands(object):
+class TLDCommands:
 
     def tld_list(self, *args, **kwargs):
         return self.parsed_cmd('tld list', ListModel, *args, **kwargs)
 
     def tld_show(self, id, *args, **kwargs):
-        return self.parsed_cmd('tld show {0}'.format(id), FieldValueModel,
+        return self.parsed_cmd(f'tld show {id}', FieldValueModel,
                                *args, **kwargs)
 
     def tld_delete(self, id, *args, **kwargs):
-        return self.parsed_cmd('tld delete {0}'.format(id), *args, **kwargs)
+        return self.parsed_cmd(f'tld delete {id}', *args, **kwargs)
 
     def tld_create(self, name, description=None, *args, **kwargs):
         options_str = build_option_string({
             '--name': name,
             '--description': description,
         })
-        cmd = 'tld create {0}'.format(options_str)
+        cmd = f'tld create {options_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def tld_set(self, id, name=None, description=None, no_description=False,
@@ -273,20 +270,20 @@ class TLDCommands(object):
             '--description': description,
         })
         flags_str = build_flags_string({'--no-description': no_description})
-        cmd = 'tld set {0} {1} {2}'.format(id, options_str, flags_str)
+        cmd = f'tld set {id} {options_str} {flags_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
 
-class TSIGKeyCommands(object):
+class TSIGKeyCommands:
     def tsigkey_list(self, *args, **kwargs):
         return self.parsed_cmd('tsigkey list', ListModel, *args, **kwargs)
 
     def tsigkey_show(self, id, *args, **kwargs):
-        return self.parsed_cmd('tsigkey show {0}'.format(id), FieldValueModel,
+        return self.parsed_cmd(f'tsigkey show {id}', FieldValueModel,
                                *args, **kwargs)
 
     def tsigkey_delete(self, id, *args, **kwargs):
-        return self.parsed_cmd('tsigkey delete {0}'.format(id), *args,
+        return self.parsed_cmd(f'tsigkey delete {id}', *args,
                                **kwargs)
 
     def tsigkey_create(self, name, algorithm, secret, scope, resource_id,
@@ -298,7 +295,7 @@ class TSIGKeyCommands(object):
             '--scope': scope,
             '--resource-id': resource_id,
         })
-        cmd = 'tsigkey create {0}'.format(options_str)
+        cmd = f'tsigkey create {options_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def tsigkey_set(self, id, name=None, algorithm=None, secret=None,
@@ -310,11 +307,11 @@ class TSIGKeyCommands(object):
             '--secret': secret,
             '--scope': scope,
         })
-        cmd = 'tsigkey set {0} {1}'.format(id, options_str)
+        cmd = f'tsigkey set {id} {options_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
 
-class BlacklistCommands(object):
+class BlacklistCommands:
     def zone_blacklist_list(self, *args, **kwargs):
         cmd = 'zone blacklist list'
         return self.parsed_cmd(cmd, ListModel, *args, **kwargs)
@@ -325,7 +322,7 @@ class BlacklistCommands(object):
             '--pattern': pattern,
             '--description': description,
         })
-        cmd = 'zone blacklist create {0}'.format(options_str)
+        cmd = f'zone blacklist create {options_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_blacklist_set(self, id, pattern=None, description=None,
@@ -335,35 +332,34 @@ class BlacklistCommands(object):
             '--description': description,
         })
         flags_str = build_flags_string({'--no-description': no_description})
-        cmd = 'zone blacklist set {0} {1} {2}'.format(id, options_str,
-                                                      flags_str)
+        cmd = f'zone blacklist set {id} {options_str} {flags_str}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_blacklist_show(self, id, *args, **kwargs):
-        cmd = 'zone blacklist show {0}'.format(id)
+        cmd = f'zone blacklist show {id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def zone_blacklist_delete(self, id, *args, **kwargs):
-        cmd = 'zone blacklist delete {0}'.format(id)
+        cmd = f'zone blacklist delete {id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
 
-class SharedZoneCommands(object):
+class SharedZoneCommands:
 
     def shared_zone_show(self, zone_id, shared_zone_id, *args, **kwargs):
-        cmd = 'zone share show {0} {1}'.format(zone_id, shared_zone_id)
+        cmd = f'zone share show {zone_id} {shared_zone_id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def shared_zone_list(self, zone_id, *args, **kwargs):
-        cmd = 'zone share list {0}'.format(zone_id)
+        cmd = f'zone share list {zone_id}'
         return self.parsed_cmd(cmd, ListModel, *args, **kwargs)
 
     def share_zone(self, zone_id, target_project_id, *args, **kwargs):
-        cmd = 'zone share create {0} {1}'.format(zone_id, target_project_id)
+        cmd = f'zone share create {zone_id} {target_project_id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
     def unshare_zone(self, zone_id, shared_zone_id, *args, **kwargs):
-        cmd = 'zone share delete {0} {1}'.format(zone_id, shared_zone_id)
+        cmd = f'zone share delete {zone_id} {shared_zone_id}'
         return self.parsed_cmd(cmd, FieldValueModel, *args, **kwargs)
 
 
@@ -375,7 +371,7 @@ class DesignateCLI(base.CLIClient, ZoneCommands, ZoneTransferCommands,
     _CLIENTS = None
 
     def __init__(self, *args, **kwargs):
-        super(DesignateCLI, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         # grab the project id. this is used for zone transfer requests
         resp = FieldValueModel(self.openstack('token issue'))
         self.project_id = resp.project_id
@@ -421,7 +417,7 @@ class DesignateCLI(base.CLIClient, ZoneCommands, ZoneTransferCommands,
         clients = self.get_clients()
         if user in clients:
             return clients[user]
-        raise Exception("User '{0}' does not exist".format(user))
+        raise Exception(f"User '{user}' does not exist")
 
     def parsed_cmd(self, cmd, model=None, *args, **kwargs):
         if self.using_auth_override:
diff --git a/designateclient/functionaltests/datagen.py b/designateclient/functionaltests/datagen.py
index 3aea79d6..1ed70271 100644
--- a/designateclient/functionaltests/datagen.py
+++ b/designateclient/functionaltests/datagen.py
@@ -18,40 +18,43 @@ import string
 
 
 def random_digits(n=8):
-    return "".join([random.choice(string.digits) for _ in range(n)])
+    return ''.join([random.choice(string.digits) for _ in range(n)])
 
 
 def random_tld(name='testtld'):
-    return "{0}{1}".format(name, random_digits())
+    return f'{name}{random_digits()}'
 
 
 def random_tsigkey_name(name='testtsig'):
-    return "{0}{1}".format(name, random_digits())
+    return f'{name}{random_digits()}'
 
 
 def random_tsigkey_secret(name='test-secret'):
-    return "{0}-{1}".format(name, random_digits(254 - len(name)))
+    return f'{name}-{random_digits(254 - len(name))}'
 
 
 def random_zone_name(name='testdomain', tld='com'):
-    return "{0}{1}.{2}.".format(name, random_digits(), tld)
+    return f'{name}{random_digits()}.{tld}.'
 
 
 def random_a_recordset_name(zone_name, recordset_name='testrecord'):
-    return "{0}{1}.{2}".format(recordset_name, random_digits(), zone_name)
+    return f'{recordset_name}{random_digits()}.{zone_name}'
 
 
 def random_blacklist(name='testblacklist'):
-    return '{0}{1}'.format(name, random_digits())
+    return f'{name}{random_digits()}'
 
 
 def random_zone_file(name='testzoneimport'):
-    return ("$ORIGIN {0}{1}.com.\n"
-            "$TTL 300\n"
-            "{0}{1}.com. 300 IN SOA ns.{0}{1}.com. "
-            "nsadmin.{0}{1}.com. 42 42 42 42 42\n"
-            "{0}{1}.com. 300 IN NS ns.{0}{1}.com.\n"
-            "{0}{1}.com. 300 IN MX 10 mail.{0}{1}.com.\n"
-            "ns.{0}{1}.com. 300 IN A 10.0.0.1\n"
-            "mail.{0}{1}.com. 300 IN A 10.0.0.2\n".format(name,
-                                                          random_digits()))
+    return (
+        '$ORIGIN {0}{1}.com.\n'
+        '$TTL 300\n'
+        '{0}{1}.com. 300 IN SOA ns.{0}{1}.com. '
+        'nsadmin.{0}{1}.com. 42 42 42 42 42\n'
+        '{0}{1}.com. 300 IN NS ns.{0}{1}.com.\n'
+        '{0}{1}.com. 300 IN MX 10 mail.{0}{1}.com.\n'
+        'ns.{0}{1}.com. 300 IN A 10.0.0.1\n'
+        'mail.{0}{1}.com. 300 IN A 10.0.0.2\n'.format(
+            name, random_digits()
+        )
+    )
diff --git a/designateclient/functionaltests/models.py b/designateclient/functionaltests/models.py
index 0e49d92e..8fac7978 100644
--- a/designateclient/functionaltests/models.py
+++ b/designateclient/functionaltests/models.py
@@ -16,7 +16,7 @@ limitations under the License.
 from tempest.lib.cli import output_parser
 
 
-class Model(object):
+class Model:
 
     def __str__(self):
         return str(self.__dict__)
diff --git a/designateclient/functionaltests/v2/fixtures.py b/designateclient/functionaltests/v2/fixtures.py
index c72a18b7..38f61fbc 100644
--- a/designateclient/functionaltests/v2/fixtures.py
+++ b/designateclient/functionaltests/v2/fixtures.py
@@ -28,7 +28,7 @@ class BaseFixture(fixtures.Fixture):
 
     def __init__(self, user='default', *args, **kwargs):
         """args/kwargs are forwarded to a create method on DesignateCLI"""
-        super(BaseFixture, self).__init__()
+        super().__init__()
         self.args = args
         self.kwargs = kwargs
         self.client = DesignateCLI.as_user(user)
@@ -39,7 +39,7 @@ class BaseFixture(fixtures.Fixture):
         # with an artificial SetupError, which produces bad error messages.
         # This just logs those stack traces to stderr for easier debugging.
         try:
-            super(BaseFixture, self).setUp()
+            super().setUp()
         except MultipleExceptions as e:
             for i, exc_info in enumerate(e.args):
                 print('--- printing MultipleExceptions traceback {} of {} ---'
@@ -52,7 +52,7 @@ class ZoneFixture(BaseFixture):
     """See DesignateCLI.zone_create for __init__ args"""
 
     def _setUp(self):
-        super(ZoneFixture, self)._setUp()
+        super()._setUp()
         self.zone = self.client.zone_create(*self.args, **self.kwargs)
         self.addCleanup(self.cleanup_zone, self.client, self.zone.id)
 
@@ -69,7 +69,7 @@ class TransferRequestFixture(BaseFixture):
 
     def __init__(self, zone, user='default', target_user='alt', *args,
                  **kwargs):
-        super(TransferRequestFixture, self).__init__(user, *args, **kwargs)
+        super().__init__(user, *args, **kwargs)
         self.zone = zone
         self.target_client = DesignateCLI.as_user(target_user)
 
@@ -78,7 +78,7 @@ class TransferRequestFixture(BaseFixture):
         self.kwargs['target_project_id'] = self.target_client.project_id
 
     def _setUp(self):
-        super(TransferRequestFixture, self)._setUp()
+        super()._setUp()
         self.transfer_request = self.client.zone_transfer_request_create(
             zone_id=self.zone.id,
             *self.args, **self.kwargs
@@ -101,11 +101,11 @@ class ExportFixture(BaseFixture):
     """See DesignateCLI.zone_export_create for __init__ args"""
 
     def __init__(self, zone, user='default', *args, **kwargs):
-        super(ExportFixture, self).__init__(user, *args, **kwargs)
+        super().__init__(user, *args, **kwargs)
         self.zone = zone
 
     def _setUp(self):
-        super(ExportFixture, self)._setUp()
+        super()._setUp()
         self.zone_export = self.client.zone_export_create(
             zone_id=self.zone.id,
             *self.args, **self.kwargs
@@ -126,11 +126,11 @@ class ImportFixture(BaseFixture):
     """See DesignateCLI.zone_import_create for __init__ args"""
 
     def __init__(self, zone_file_contents, user='default', *args, **kwargs):
-        super(ImportFixture, self).__init__(user, *args, **kwargs)
+        super().__init__(user, *args, **kwargs)
         self.zone_file_contents = zone_file_contents
 
     def _setUp(self):
-        super(ImportFixture, self)._setUp()
+        super()._setUp()
 
         with tempfile.NamedTemporaryFile() as f:
             f.write(self.zone_file_contents)
@@ -158,7 +158,7 @@ class RecordsetFixture(BaseFixture):
     """See DesignateCLI.recordset_create for __init__ args"""
 
     def _setUp(self):
-        super(RecordsetFixture, self)._setUp()
+        super()._setUp()
         self.recordset = self.client.recordset_create(
             *self.args, **self.kwargs)
         self.addCleanup(self.cleanup_recordset, self.client,
@@ -176,10 +176,10 @@ class TLDFixture(BaseFixture):
     """See DesignateCLI.tld_create for __init__ args"""
 
     def __init__(self, user='admin', *args, **kwargs):
-        super(TLDFixture, self).__init__(user=user, *args, **kwargs)
+        super().__init__(user=user, *args, **kwargs)
 
     def _setUp(self):
-        super(TLDFixture, self)._setUp()
+        super()._setUp()
         self.tld = self.client.tld_create(*self.args, **self.kwargs)
         self.addCleanup(self.cleanup_tld, self.client, self.tld.id)
 
@@ -195,10 +195,10 @@ class TSIGKeyFixture(BaseFixture):
     """See DesignateCLI.tsigkey_create for __init__ args"""
 
     def __init__(self, user='admin', *args, **kwargs):
-        super(TSIGKeyFixture, self).__init__(user=user, *args, **kwargs)
+        super().__init__(user=user, *args, **kwargs)
 
     def _setUp(self):
-        super(TSIGKeyFixture, self)._setUp()
+        super()._setUp()
         self.tsigkey = self.client.tsigkey_create(*self.args, **self.kwargs)
         self.addCleanup(self.cleanup_tsigkey(self.client, self.tsigkey.id))
 
@@ -214,10 +214,10 @@ class BlacklistFixture(BaseFixture):
     """See DesignateCLI.zone_blacklist_create for __init__ args"""
 
     def __init__(self, user='admin', *args, **kwargs):
-        super(BlacklistFixture, self).__init__(user=user, *args, **kwargs)
+        super().__init__(user=user, *args, **kwargs)
 
     def _setUp(self):
-        super(BlacklistFixture, self)._setUp()
+        super()._setUp()
         self.blacklist = self.client.zone_blacklist_create(*self.args,
                                                            **self.kwargs)
         self.addCleanup(self.cleanup_blacklist, self.client, self.blacklist.id)
@@ -234,11 +234,11 @@ class SharedZoneFixture(BaseFixture):
     """See DesignateCLI.recordset_create for __init__ args"""
 
     def __init__(self, zone, *args, **kwargs):
-        super(SharedZoneFixture, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.zone = zone
 
     def _setUp(self):
-        super(SharedZoneFixture, self)._setUp()
+        super()._setUp()
         self.zone_share = self.client.zone_share(zone_id=self.zone.id,
                                                  *self.args, **self.kwargs)
         self.addCleanup(self.cleanup_shared_zone, self.client, self.zone.id,
diff --git a/designateclient/functionaltests/v2/test_blacklist.py b/designateclient/functionaltests/v2/test_blacklist.py
index db8c756c..e9881965 100644
--- a/designateclient/functionaltests/v2/test_blacklist.py
+++ b/designateclient/functionaltests/v2/test_blacklist.py
@@ -23,7 +23,7 @@ from designateclient.functionaltests.v2.fixtures import BlacklistFixture
 class TestBlacklist(BaseDesignateTest):
 
     def setUp(self):
-        super(TestBlacklist, self).setUp()
+        super().setUp()
         pattern = random_blacklist()
         self.blacklist = self.useFixture(BlacklistFixture(
             pattern=pattern,
diff --git a/designateclient/functionaltests/v2/test_recordsets.py b/designateclient/functionaltests/v2/test_recordsets.py
index 419d03ce..69f4161e 100644
--- a/designateclient/functionaltests/v2/test_recordsets.py
+++ b/designateclient/functionaltests/v2/test_recordsets.py
@@ -25,7 +25,7 @@ from designateclient.functionaltests.v2.fixtures import ZoneFixture
 class TestRecordset(BaseDesignateTest):
 
     def setUp(self):
-        super(TestRecordset, self).setUp()
+        super().setUp()
         self.ensure_tld_exists('com')
         self.zone = self.useFixture(ZoneFixture(
             name=random_zone_name(),
diff --git a/designateclient/functionaltests/v2/test_shared_zone.py b/designateclient/functionaltests/v2/test_shared_zone.py
index 0e8b3928..1aa225a9 100644
--- a/designateclient/functionaltests/v2/test_shared_zone.py
+++ b/designateclient/functionaltests/v2/test_shared_zone.py
@@ -23,7 +23,7 @@ from designateclient.functionaltests.v2.fixtures import ZoneFixture
 class TestSharedZone(BaseDesignateTest):
 
     def setUp(self):
-        super(TestSharedZone, self).setUp()
+        super().setUp()
         self.ensure_tld_exists('com')
         fixture = self.useFixture(ZoneFixture(
             name=random_zone_name(),
diff --git a/designateclient/functionaltests/v2/test_tlds.py b/designateclient/functionaltests/v2/test_tlds.py
index 402dffcf..2c8f3b6a 100644
--- a/designateclient/functionaltests/v2/test_tlds.py
+++ b/designateclient/functionaltests/v2/test_tlds.py
@@ -23,7 +23,7 @@ from designateclient.functionaltests.v2.fixtures import TLDFixture
 class TestTld(BaseDesignateTest):
 
     def setUp(self):
-        super(TestTld, self).setUp()
+        super().setUp()
         tld_name = random_tld()
         self.tld = self.useFixture(TLDFixture(
             name=tld_name,
diff --git a/designateclient/functionaltests/v2/test_tsigkeys.py b/designateclient/functionaltests/v2/test_tsigkeys.py
index 7ed4d75b..4aa7c537 100644
--- a/designateclient/functionaltests/v2/test_tsigkeys.py
+++ b/designateclient/functionaltests/v2/test_tsigkeys.py
@@ -25,7 +25,7 @@ from designateclient.functionaltests.v2.fixtures import ZoneFixture
 
 class TestTSIGKey(BaseDesignateTest):
     def setUp(self):
-        super(TestTSIGKey, self).setUp()
+        super().setUp()
         self.ensure_tsigkey_exists('com')
         self.zone = self.useFixture(ZoneFixture(
             name=random_zone_name(),
diff --git a/designateclient/functionaltests/v2/test_zone.py b/designateclient/functionaltests/v2/test_zone.py
index 4f1b803b..b571ca11 100644
--- a/designateclient/functionaltests/v2/test_zone.py
+++ b/designateclient/functionaltests/v2/test_zone.py
@@ -23,7 +23,7 @@ from designateclient.functionaltests.v2.fixtures import ZoneFixture
 class TestZone(BaseDesignateTest):
 
     def setUp(self):
-        super(TestZone, self).setUp()
+        super().setUp()
         self.ensure_tld_exists('com')
         self.fixture = self.useFixture(ZoneFixture(
             name=random_zone_name(),
@@ -61,7 +61,7 @@ class TestZone(BaseDesignateTest):
 
     def test_zone_set(self):
         ttl = int(self.zone.ttl) + 123
-        email = 'updated{0}'.format(self.zone.email)
+        email = f'updated{self.zone.email}'
         description = 'new description'
 
         zone = self.clients.zone_set(self.zone.id, ttl=ttl, email=email,
@@ -71,8 +71,9 @@ class TestZone(BaseDesignateTest):
         self.assertEqual(description, zone.description)
 
     def test_invalid_option_on_zone_create(self):
-        cmd = 'zone create %s --invalid "not a valid option"'.format(
-            random_zone_name())
+        cmd = 'zone create {} --invalid "not a valid option"'.format(
+            random_zone_name()
+        )
         self.assertRaises(CommandFailed, self.clients.openstack, cmd)
 
     def test_invalid_zone_command(self):
@@ -83,7 +84,7 @@ class TestZone(BaseDesignateTest):
 class TestsPassingZoneFlags(BaseDesignateTest):
 
     def setUp(self):
-        super(TestsPassingZoneFlags, self).setUp()
+        super().setUp()
         self.ensure_tld_exists('com')
 
     def test_zone_create_primary_with_all_args(self):
diff --git a/designateclient/functionaltests/v2/test_zone_export.py b/designateclient/functionaltests/v2/test_zone_export.py
index 6052a997..7f06fc1e 100644
--- a/designateclient/functionaltests/v2/test_zone_export.py
+++ b/designateclient/functionaltests/v2/test_zone_export.py
@@ -24,7 +24,7 @@ from designateclient.functionaltests.v2.fixtures import ZoneFixture
 class TestZoneExport(BaseDesignateTest):
 
     def setUp(self):
-        super(TestZoneExport, self).setUp()
+        super().setUp()
         self.ensure_tld_exists('com')
         fixture = self.useFixture(ZoneFixture(
             name=random_zone_name(),
diff --git a/designateclient/functionaltests/v2/test_zone_import.py b/designateclient/functionaltests/v2/test_zone_import.py
index 51c9906a..f672befc 100644
--- a/designateclient/functionaltests/v2/test_zone_import.py
+++ b/designateclient/functionaltests/v2/test_zone_import.py
@@ -23,7 +23,7 @@ from designateclient.functionaltests.v2.fixtures import ImportFixture
 class TestZoneImport(BaseDesignateTest):
 
     def setUp(self):
-        super(TestZoneImport, self).setUp()
+        super().setUp()
         self.ensure_tld_exists('com')
         self.zone_file_contents = random_zone_file()
 
diff --git a/designateclient/functionaltests/v2/test_zone_transfer.py b/designateclient/functionaltests/v2/test_zone_transfer.py
index 32c572b1..c43fc1a1 100644
--- a/designateclient/functionaltests/v2/test_zone_transfer.py
+++ b/designateclient/functionaltests/v2/test_zone_transfer.py
@@ -27,7 +27,7 @@ from designateclient.functionaltests.v2.fixtures import ZoneFixture
 class TestZoneTransferRequest(BaseDesignateTest):
 
     def setUp(self):
-        super(TestZoneTransferRequest, self).setUp()
+        super().setUp()
         self.ensure_tld_exists('com')
         fixture = self.useFixture(ZoneFixture(
             name=random_zone_name(),
@@ -92,7 +92,7 @@ class TestZoneTransferRequest(BaseDesignateTest):
 class TestZoneTransferAccept(BaseDesignateTest):
 
     def setUp(self):
-        super(TestZoneTransferAccept, self).setUp()
+        super().setUp()
         self.ensure_tld_exists('com')
         fixture = self.useFixture(ZoneFixture(
             name=random_zone_name(),
diff --git a/designateclient/tests/base.py b/designateclient/tests/base.py
index a4888c7d..5bcdd8cd 100644
--- a/designateclient/tests/base.py
+++ b/designateclient/tests/base.py
@@ -35,7 +35,7 @@ class TestCase(test.BaseTestCase):
     def setUp(self):
         """Run before each test method to initialize test environment."""
 
-        super(TestCase, self).setUp()
+        super().setUp()
         test_timeout = os.environ.get('OS_TEST_TIMEOUT', 0)
         try:
             test_timeout = int(test_timeout)
@@ -74,7 +74,7 @@ class APITestCase(TestCase):
 
     def get_base(self, base_url=None):
         if not base_url:
-            base_url = '%sv%s' % (self.TEST_URL, self.VERSION)
+            base_url = f'{self.TEST_URL}v{self.VERSION}'
         return base_url
 
     def stub_url(self, method, parts=None, base_url=None, json=None, **kwargs):
diff --git a/designateclient/tests/osc/v2/test_recordsets.py b/designateclient/tests/osc/v2/test_recordsets.py
index c9d2252c..1a8eba86 100644
--- a/designateclient/tests/osc/v2/test_recordsets.py
+++ b/designateclient/tests/osc/v2/test_recordsets.py
@@ -21,7 +21,7 @@ from designateclient.v2.cli import recordsets
 
 class TestDesignateCreateRecordSets(utils.TestCommand):
     def setUp(self):
-        super(TestDesignateCreateRecordSets, self).setUp()
+        super().setUp()
         self.app.client_manager.dns = mock.MagicMock()
         self.cmd = recordsets.CreateRecordSetCommand(self.app, None)
         self.dns_client = self.app.client_manager.dns
@@ -54,7 +54,7 @@ class TestDesignateCreateRecordSets(utils.TestCommand):
 
 class TestDesignateListRecordSets(utils.TestCommand):
     def setUp(self):
-        super(TestDesignateListRecordSets, self).setUp()
+        super().setUp()
         self.app.client_manager.dns = mock.MagicMock()
         self.cmd = recordsets.ListRecordSetsCommand(self.app, None)
         self.dns_client = self.app.client_manager.dns
diff --git a/designateclient/tests/osc/v2/test_zone.py b/designateclient/tests/osc/v2/test_zone.py
index adf3f3d9..1178b40b 100644
--- a/designateclient/tests/osc/v2/test_zone.py
+++ b/designateclient/tests/osc/v2/test_zone.py
@@ -21,7 +21,7 @@ from designateclient.v2.cli import zones
 
 class TestDesignateCreateZone(utils.TestCommand):
     def setUp(self):
-        super(TestDesignateCreateZone, self).setUp()
+        super().setUp()
         self.app.client_manager.dns = mock.MagicMock()
         self.cmd = zones.CreateZoneCommand(self.app, None)
         self.dns_client = self.app.client_manager.dns
@@ -49,7 +49,7 @@ class TestDesignateCreateZone(utils.TestCommand):
 
 class TestDesignateListZones(utils.TestCommand):
     def setUp(self):
-        super(TestDesignateListZones, self).setUp()
+        super().setUp()
         self.app.client_manager.dns = mock.MagicMock()
         self.cmd = zones.ListZonesCommand(self.app, None)
         self.dns_client = self.app.client_manager.dns
diff --git a/designateclient/tests/v2/__init__.py b/designateclient/tests/v2/__init__.py
index f870d158..20fa5693 100644
--- a/designateclient/tests/v2/__init__.py
+++ b/designateclient/tests/v2/__init__.py
@@ -18,7 +18,7 @@ import uuid
 from designateclient.tests import base
 
 
-class CrudMixin(object):
+class CrudMixin:
     path_prefix = None
 
     def new_ref(self, **kwargs):
diff --git a/designateclient/tests/v2/test_blacklists.py b/designateclient/tests/v2/test_blacklists.py
index df1ceb5d..ecbba6a0 100644
--- a/designateclient/tests/v2/test_blacklists.py
+++ b/designateclient/tests/v2/test_blacklists.py
@@ -22,7 +22,7 @@ class TestBlacklists(v2.APIV2TestCase, v2.CrudMixin):
     RESOURCE = 'blacklists'
 
     def new_ref(self, **kwargs):
-        ref = super(TestBlacklists, self).new_ref(**kwargs)
+        ref = super().new_ref(**kwargs)
         ref.setdefault("pattern", uuid.uuid4().hex)
         return ref
 
diff --git a/designateclient/tests/v2/test_recordsets.py b/designateclient/tests/v2/test_recordsets.py
index 1478f223..11806ac0 100644
--- a/designateclient/tests/v2/test_recordsets.py
+++ b/designateclient/tests/v2/test_recordsets.py
@@ -32,7 +32,7 @@ class TestRecordSets(v2.APIV2TestCase, v2.CrudMixin):
     RESOURCE = 'recordsets'
 
     def new_ref(self, **kwargs):
-        ref = super(TestRecordSets, self).new_ref(**kwargs)
+        ref = super().new_ref(**kwargs)
         ref.setdefault("name", uuid.uuid4().hex)
         ref.setdefault("type", "A")
         ref.setdefault("records", ["10.0.0.1"])
@@ -49,11 +49,11 @@ class TestRecordSets(v2.APIV2TestCase, v2.CrudMixin):
 
         self.client.recordsets.create(
             ZONE,
-            "%s.%s" % (values["name"], ZONE["name"]),
+            "{}.{}".format(values["name"], ZONE["name"]),
             values["type"],
             values["records"])
 
-        values["name"] = "%s.%s" % (ref["name"], ZONE["name"])
+        values["name"] = "{}.{}".format(ref["name"], ZONE["name"])
         self.assertRequestBodyIs(json=values)
 
     @patch.object(zones.ZoneController, "get")
@@ -70,11 +70,11 @@ class TestRecordSets(v2.APIV2TestCase, v2.CrudMixin):
 
         self.client.recordsets.create(
             ZONE["name"],
-            "%s.%s" % (values["name"], ZONE["name"]),
+            "{}.{}".format(values["name"], ZONE["name"]),
             values["type"],
             values["records"])
 
-        values["name"] = "%s.%s" % (ref["name"], ZONE["name"])
+        values["name"] = "{}.{}".format(ref["name"], ZONE["name"])
         self.assertRequestBodyIs(json=values)
 
     @patch.object(zones.ZoneController, "get")
@@ -95,7 +95,7 @@ class TestRecordSets(v2.APIV2TestCase, v2.CrudMixin):
             values["type"],
             values["records"])
 
-        values["name"] = "%s.%s" % (ref["name"], ZONE["name"])
+        values["name"] = "{}.{}".format(ref["name"], ZONE["name"])
         self.assertRequestBodyIs(json=values)
 
     @patch.object(zones.ZoneController, "list")
@@ -112,7 +112,7 @@ class TestRecordSets(v2.APIV2TestCase, v2.CrudMixin):
         with testtools.ExpectedException(exceptions.NoUniqueMatch):
             self.client.recordsets.create(
                 ZONE["name"],
-                "%s.%s" % (values["name"], ZONE["name"]),
+                "{}.{}".format(values["name"], ZONE["name"]),
                 values["type"],
                 values["records"])
 
@@ -127,11 +127,11 @@ class TestRecordSets(v2.APIV2TestCase, v2.CrudMixin):
 
         self.client.recordsets.create(
             ZONE["id"],
-            "%s.%s" % (values["name"], ZONE["name"]),
+            "{}.{}".format(values["name"], ZONE["name"]),
             values["type"],
             values["records"])
 
-        values["name"] = "%s.%s" % (ref["name"], ZONE["name"])
+        values["name"] = "{}.{}".format(ref["name"], ZONE["name"])
         self.assertRequestBodyIs(json=values)
 
     @patch.object(zones.ZoneController, "get")
@@ -152,7 +152,7 @@ class TestRecordSets(v2.APIV2TestCase, v2.CrudMixin):
             values["type"],
             values["records"])
 
-        values["name"] = "%s.%s" % (ref["name"], ZONE["name"])
+        values["name"] = "{}.{}".format(ref["name"], ZONE["name"])
         self.assertRequestBodyIs(json=values)
 
     def test_create_with_description(self):
@@ -166,12 +166,12 @@ class TestRecordSets(v2.APIV2TestCase, v2.CrudMixin):
 
         self.client.recordsets.create(
             ZONE["id"],
-            "%s.%s" % (values["name"], ZONE["name"]),
+            "{}.{}".format(values["name"], ZONE["name"]),
             values["type"],
             values["records"],
             description=values["description"])
 
-        values["name"] = "%s.%s" % (ref["name"], ZONE["name"])
+        values["name"] = "{}.{}".format(ref["name"], ZONE["name"])
         self.assertRequestBodyIs(json=values)
 
     def test_create_with_ttl(self):
@@ -185,12 +185,12 @@ class TestRecordSets(v2.APIV2TestCase, v2.CrudMixin):
 
         self.client.recordsets.create(
             ZONE["id"],
-            "%s.%s" % (values["name"], ZONE["name"]),
+            "{}.{}".format(values["name"], ZONE["name"]),
             values["type"],
             values["records"],
             ttl=values["ttl"])
 
-        values["name"] = "%s.%s" % (ref["name"], ZONE["name"])
+        values["name"] = "{}.{}".format(ref["name"], ZONE["name"])
         self.assertRequestBodyIs(json=values)
 
     def test_get(self):
diff --git a/designateclient/tests/v2/test_reverse.py b/designateclient/tests/v2/test_reverse.py
index a303f07b..85add3c9 100644
--- a/designateclient/tests/v2/test_reverse.py
+++ b/designateclient/tests/v2/test_reverse.py
@@ -17,7 +17,7 @@ import uuid
 
 from designateclient.tests import v2
 
-FIP_ID = '%s:%s' % (str(uuid.uuid4()), "RegionOne")
+FIP_ID = '{}:{}'.format(str(uuid.uuid4()), "RegionOne")
 
 
 class TestFloatingIP(v2.APIV2TestCase, v2.CrudMixin):
diff --git a/designateclient/tests/v2/test_service_statuses.py b/designateclient/tests/v2/test_service_statuses.py
index 9dd571d3..d6349ac3 100644
--- a/designateclient/tests/v2/test_service_statuses.py
+++ b/designateclient/tests/v2/test_service_statuses.py
@@ -20,7 +20,7 @@ class TestServiceStatuses(v2.APIV2TestCase, v2.CrudMixin):
     RESOURCE = 'service_statuses'
 
     def new_ref(self, **kwargs):
-        ref = super(TestServiceStatuses, self).new_ref(**kwargs)
+        ref = super().new_ref(**kwargs)
         ref["name"] = "foo"
         return ref
 
diff --git a/designateclient/tests/v2/test_timeout.py b/designateclient/tests/v2/test_timeout.py
index 0b42a39a..ec96bbd6 100644
--- a/designateclient/tests/v2/test_timeout.py
+++ b/designateclient/tests/v2/test_timeout.py
@@ -31,7 +31,7 @@ def create_session(timeout=None):
 class TestTimeout(v2.APIV2TestCase, v2.CrudMixin):
 
     def setUp(self):
-        super(TestTimeout, self).setUp()
+        super().setUp()
 
         # Mock methods in KeyStone's Session
         self._saved_methods = (
@@ -56,7 +56,7 @@ class TestTimeout(v2.APIV2TestCase, v2.CrudMixin):
         self.mock_send_request = keystone_session.Session._send_request
 
     def tearDown(self):
-        super(TestTimeout, self).tearDown()
+        super().tearDown()
         (
             keystone_session.Session.get_auth_headers,
             keystone_session.Session.get_endpoint,
diff --git a/designateclient/tests/v2/test_tlds.py b/designateclient/tests/v2/test_tlds.py
index 080e8fe5..4d699f10 100644
--- a/designateclient/tests/v2/test_tlds.py
+++ b/designateclient/tests/v2/test_tlds.py
@@ -22,7 +22,7 @@ class TestTlds(v2.APIV2TestCase, v2.CrudMixin):
     RESOURCE = 'tlds'
 
     def new_ref(self, **kwargs):
-        ref = super(TestTlds, self).new_ref(**kwargs)
+        ref = super().new_ref(**kwargs)
         ref.setdefault("name", uuid.uuid4().hex)
         return ref
 
diff --git a/designateclient/tests/v2/test_tsigkeys.py b/designateclient/tests/v2/test_tsigkeys.py
index 6290ffaa..0ce74cfd 100644
--- a/designateclient/tests/v2/test_tsigkeys.py
+++ b/designateclient/tests/v2/test_tsigkeys.py
@@ -22,7 +22,7 @@ class TestTSIGKeys(v2.APIV2TestCase, v2.CrudMixin):
     RESOURCE = 'tsigkeys'
 
     def new_ref(self, **kwargs):
-        ref = super(TestTSIGKeys, self).new_ref(**kwargs)
+        ref = super().new_ref(**kwargs)
         ref.setdefault("name", uuid.uuid4().hex)
         ref.setdefault("algorithm", "hmac-sha256")
         ref.setdefault("secret", uuid.uuid4().hex)
diff --git a/designateclient/tests/v2/test_zones.py b/designateclient/tests/v2/test_zones.py
index 63ee81e3..fd306545 100644
--- a/designateclient/tests/v2/test_zones.py
+++ b/designateclient/tests/v2/test_zones.py
@@ -23,7 +23,7 @@ class TestZones(v2.APIV2TestCase, v2.CrudMixin):
     RESOURCE = 'zones'
 
     def new_ref(self, **kwargs):
-        ref = super(TestZones, self).new_ref(**kwargs)
+        ref = super().new_ref(**kwargs)
         ref.setdefault("name", uuid.uuid4().hex)
         ref.setdefault("type", "PRIMARY")
         return ref
@@ -278,7 +278,7 @@ class TestZoneTransfers(v2.APIV2TestCase, v2.CrudMixin):
 
 class TestZoneExports(v2.APIV2TestCase, v2.CrudMixin):
     def new_ref(self, **kwargs):
-        ref = super(TestZoneExports, self).new_ref(**kwargs)
+        ref = super().new_ref(**kwargs)
         ref.setdefault("zone_id", uuid.uuid4().hex)
         ref.setdefault("created_at", time.strftime("%c"))
         ref.setdefault("updated_at", time.strftime("%c"))
@@ -342,7 +342,7 @@ class TestZoneExports(v2.APIV2TestCase, v2.CrudMixin):
 
 class TestZoneImports(v2.APIV2TestCase, v2.CrudMixin):
     def new_ref(self, **kwargs):
-        ref = super(TestZoneImports, self).new_ref(**kwargs)
+        ref = super().new_ref(**kwargs)
         ref.setdefault("zone_id", uuid.uuid4().hex)
         ref.setdefault("created_at", time.strftime("%c"))
         ref.setdefault("updated_at", time.strftime("%c"))
@@ -396,7 +396,7 @@ class TestZoneImports(v2.APIV2TestCase, v2.CrudMixin):
 
 class TestZoneShared(v2.APIV2TestCase, v2.CrudMixin):
     def setUp(self):
-        super(TestZoneShared, self).setUp()
+        super().setUp()
         self.zone_id = str(uuid.uuid4())
         self.target_project_id = str(uuid.uuid4())
         self.project_id = str(uuid.uuid4())
@@ -404,7 +404,7 @@ class TestZoneShared(v2.APIV2TestCase, v2.CrudMixin):
         self.updated_at = time.strftime("%c")
 
     def new_ref(self, **kwargs):
-        ref = super(TestZoneShared, self).new_ref(**kwargs)
+        ref = super().new_ref(**kwargs)
         ref.setdefault("zone_id", self.zone_id)
         ref.setdefault("target_project_id", self.target_project_id)
         ref.setdefault("project_id", self.project_id)
diff --git a/designateclient/utils.py b/designateclient/utils.py
index 79b1fb68..8781378f 100644
--- a/designateclient/utils.py
+++ b/designateclient/utils.py
@@ -82,11 +82,11 @@ def find_resourceid_by_name_or_id(resource_client, name_or_id):
     candidate_ids = [r['id'] for r in resources if r.get('name') == name_or_id]
     if not candidate_ids:
         raise exceptions.ResourceNotFound(
-            'Could not find resource with name "%s"' % name_or_id)
+            f'Could not find resource with name "{name_or_id}"')
     elif len(candidate_ids) > 1:
         str_ids = ','.join(candidate_ids)
         raise exceptions.NoUniqueMatch(
-            'Multiple resources with name "%s": %s' % (name_or_id, str_ids))
+            f'Multiple resources with name "{name_or_id}": {str_ids}')
     return candidate_ids[0]
 
 
@@ -108,4 +108,4 @@ class AdapterWithTimeout(adapter.Adapter):
         if self.timeout is not None:
             kwargs.setdefault('timeout', self.timeout)
 
-        return super(AdapterWithTimeout, self).request(*args, **kwargs)
+        return super().request(*args, **kwargs)
diff --git a/designateclient/v2/blacklists.py b/designateclient/v2/blacklists.py
index 102c0183..cb1e6296 100644
--- a/designateclient/v2/blacklists.py
+++ b/designateclient/v2/blacklists.py
@@ -30,19 +30,19 @@ class BlacklistController(V2Controller):
     def list(self, criterion=None, marker=None, limit=None):
         url = self.build_url('/blacklists', criterion, marker, limit)
 
-        return self._get(url, response_key="blacklists")
+        return self._get(url, response_key='blacklists')
 
     def get(self, blacklist_id):
-        url = '/blacklists/%s' % blacklist_id
+        url = f'/blacklists/{blacklist_id}'
 
         return self._get(url)
 
     def update(self, blacklist_id, values):
-        url = '/blacklists/%s' % blacklist_id
+        url = f'/blacklists/{blacklist_id}'
 
         return self._patch(url, data=values)
 
     def delete(self, blacklist_id):
-        url = '/blacklists/%s' % blacklist_id
+        url = f'/blacklists/{blacklist_id}'
 
         return self._delete(url)
diff --git a/designateclient/v2/cli/blacklists.py b/designateclient/v2/cli/blacklists.py
index 11f66403..4e6bc4ed 100644
--- a/designateclient/v2/cli/blacklists.py
+++ b/designateclient/v2/cli/blacklists.py
@@ -37,7 +37,7 @@ class ListBlacklistsCommand(command.Lister):
     columns = ['id', 'pattern', 'description']
 
     def get_parser(self, prog_name):
-        parser = super(ListBlacklistsCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
         common.add_all_common_options(parser)
 
@@ -56,9 +56,9 @@ class ShowBlacklistCommand(command.ShowOne):
     """Show blacklist details"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowBlacklistCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Blacklist ID")
+        parser.add_argument('id', help='Blacklist ID')
 
         common.add_all_common_options(parser)
 
@@ -76,11 +76,11 @@ class CreateBlacklistCommand(command.ShowOne):
     """Create new blacklist"""
 
     def get_parser(self, prog_name):
-        parser = super(CreateBlacklistCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('--pattern', help="Blacklist pattern",
+        parser.add_argument('--pattern', help='Blacklist pattern',
                             required=True)
-        parser.add_argument('--description', help="Description")
+        parser.add_argument('--description', help='Description')
 
         common.add_all_common_options(parser)
 
@@ -101,13 +101,13 @@ class SetBlacklistCommand(command.ShowOne):
     """Set blacklist properties"""
 
     def get_parser(self, prog_name):
-        parser = super(SetBlacklistCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Blacklist ID")
-        parser.add_argument('--pattern', help="Blacklist pattern")
+        parser.add_argument('id', help='Blacklist ID')
+        parser.add_argument('--pattern', help='Blacklist pattern')
 
         description_group = parser.add_mutually_exclusive_group()
-        description_group.add_argument('--description', help="Description")
+        description_group.add_argument('--description', help='Description')
         description_group.add_argument('--no-description', action='store_true')
 
         common.add_all_common_options(parser)
@@ -138,9 +138,9 @@ class DeleteBlacklistCommand(command.Command):
     """Delete blacklist"""
 
     def get_parser(self, prog_name):
-        parser = super(DeleteBlacklistCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Blacklist ID")
+        parser.add_argument('id', help='Blacklist ID')
 
         common.add_all_common_options(parser)
 
diff --git a/designateclient/v2/cli/quotas.py b/designateclient/v2/cli/quotas.py
index a6fcda71..451d06b2 100644
--- a/designateclient/v2/cli/quotas.py
+++ b/designateclient/v2/cli/quotas.py
@@ -39,13 +39,13 @@ class ListQuotasCommand(show.ShowOne):
     # columns = ['resource', 'hard_limit']
 
     def get_parser(self, prog_name):
-        parser = super(ListQuotasCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
         common.add_all_common_options(parser)
 
         parser.add_argument(
             '--project-id',
-            help="Project ID Default: current project")
+            help='Project ID Default: current project')
 
         return parser
 
@@ -70,18 +70,18 @@ class SetQuotasCommand(show.ShowOne):
         return itertools.chain(DNS_QUOTAS.items())
 
     def get_parser(self, prog_name):
-        parser = super(SetQuotasCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
         common.add_all_common_options(parser)
 
-        parser.add_argument('--project-id', help="Project ID")
+        parser.add_argument('--project-id', help='Project ID')
         for k, v in self._build_options_list():
             parser.add_argument(
-                '--%s' % v,
-                metavar='<%s>' % v,
+                f'--{v}',
+                metavar=f'<{v}>',
                 dest=k,
                 type=int,
-                help='New value for the %s quota' % v,
+                help=f'New value for the {v} quota',
             )
 
         return parser
@@ -111,11 +111,11 @@ class ResetQuotasCommand(command.Command):
     """Reset quotas"""
 
     def get_parser(self, prog_name):
-        parser = super(ResetQuotasCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
         common.add_all_common_options(parser)
 
-        parser.add_argument('--project-id', help="Project ID")
+        parser.add_argument('--project-id', help='Project ID')
 
         return parser
 
diff --git a/designateclient/v2/cli/recordsets.py b/designateclient/v2/cli/recordsets.py
index d79dfb8f..10caba68 100644
--- a/designateclient/v2/cli/recordsets.py
+++ b/designateclient/v2/cli/recordsets.py
@@ -48,19 +48,19 @@ class ListRecordSetsCommand(command.Lister):
     columns = ['id', 'name', 'type', 'records', 'status', 'action']
 
     def get_parser(self, prog_name):
-        parser = super(ListRecordSetsCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('--name', help="RecordSet Name", required=False)
-        parser.add_argument('--type', help="RecordSet Type", required=False)
-        parser.add_argument('--data', help="RecordSet Record Data",
+        parser.add_argument('--name', help='RecordSet Name', required=False)
+        parser.add_argument('--type', help='RecordSet Type', required=False)
+        parser.add_argument('--data', help='RecordSet Record Data',
                             required=False)
-        parser.add_argument('--ttl', help="Time To Live (Seconds)",
+        parser.add_argument('--ttl', help='Time To Live (Seconds)',
                             required=False)
-        parser.add_argument('--description', help="Description",
+        parser.add_argument('--description', help='Description',
                             required=False)
-        parser.add_argument('--status', help="RecordSet Status",
+        parser.add_argument('--status', help='RecordSet Status',
                             required=False)
-        parser.add_argument('--action', help="RecordSet Action",
+        parser.add_argument('--action', help='RecordSet Action',
                             required=False)
 
         parser.add_argument('zone_id', help="Zone ID. To list all"
@@ -76,25 +76,25 @@ class ListRecordSetsCommand(command.Lister):
 
         criterion = {}
         if parsed_args.type is not None:
-            criterion["type"] = parsed_args.type
+            criterion['type'] = parsed_args.type
 
         if parsed_args.name is not None:
-            criterion["name"] = parsed_args.name
+            criterion['name'] = parsed_args.name
 
         if parsed_args.data is not None:
-            criterion["data"] = parsed_args.data
+            criterion['data'] = parsed_args.data
 
         if parsed_args.ttl is not None:
-            criterion["ttl"] = parsed_args.ttl
+            criterion['ttl'] = parsed_args.ttl
 
         if parsed_args.description is not None:
-            criterion["description"] = parsed_args.description
+            criterion['description'] = parsed_args.description
 
         if parsed_args.status is not None:
-            criterion["status"] = parsed_args.status
+            criterion['status'] = parsed_args.status
 
         if parsed_args.action is not None:
-            criterion["action"] = parsed_args.action
+            criterion['action'] = parsed_args.action
 
         cols = list(self.columns)
 
@@ -119,10 +119,10 @@ class ShowRecordSetCommand(command.ShowOne):
     """Show recordset details"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowRecordSetCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('zone_id', help="Zone ID")
-        parser.add_argument('id', help="RecordSet ID")
+        parser.add_argument('zone_id', help='Zone ID')
+        parser.add_argument('id', help='RecordSet ID')
 
         common.add_all_common_options(parser)
 
@@ -143,10 +143,10 @@ class CreateRecordSetCommand(command.ShowOne):
     log = logging.getLogger('deprecated')
 
     def get_parser(self, prog_name):
-        parser = super(CreateRecordSetCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('zone_id', help="Zone ID")
-        parser.add_argument('name', help="RecordSet Name")
+        parser.add_argument('zone_id', help='Zone ID')
+        parser.add_argument('name', help='RecordSet Name')
         req_group = parser.add_mutually_exclusive_group(required=True)
         req_group.add_argument(
             '--records',
@@ -154,11 +154,11 @@ class CreateRecordSetCommand(command.ShowOne):
             nargs='+')
         req_group.add_argument(
             '--record',
-            help="RecordSet Record, repeat if necessary",
+            help='RecordSet Record, repeat if necessary',
             action='append')
-        parser.add_argument('--type', help="RecordSet Type", required=True)
-        parser.add_argument('--ttl', type=int, help="Time To Live (Seconds)")
-        parser.add_argument('--description', help="Description")
+        parser.add_argument('--type', help='RecordSet Type', required=True)
+        parser.add_argument('--ttl', type=int, help='Time To Live (Seconds)')
+        parser.add_argument('--description', help='Description')
 
         common.add_all_common_options(parser)
 
@@ -171,7 +171,7 @@ class CreateRecordSetCommand(command.ShowOne):
         all_records = parsed_args.record or parsed_args.records
         if parsed_args.records:
             self.log.warning(
-                "Option --records is deprecated, use --record instead.")
+                'Option --records is deprecated, use --record instead.')
         data = client.recordsets.create(
             parsed_args.zone_id,
             parsed_args.name,
@@ -188,10 +188,10 @@ class SetRecordSetCommand(command.ShowOne):
     """Set recordset properties"""
 
     def get_parser(self, prog_name):
-        parser = super(SetRecordSetCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('zone_id', help="Zone ID")
-        parser.add_argument('id', help="RecordSet ID")
+        parser.add_argument('zone_id', help='Zone ID')
+        parser.add_argument('id', help='RecordSet ID')
         req_group = parser.add_mutually_exclusive_group()
         req_group.add_argument(
             '--records',
@@ -199,15 +199,15 @@ class SetRecordSetCommand(command.ShowOne):
             nargs='+')
         req_group.add_argument(
             '--record',
-            help="RecordSet Record, repeat if necessary",
+            help='RecordSet Record, repeat if necessary',
             action='append')
 
         description_group = parser.add_mutually_exclusive_group()
-        description_group.add_argument('--description', help="Description")
+        description_group.add_argument('--description', help='Description')
         description_group.add_argument('--no-description', action='store_true')
 
         ttl_group = parser.add_mutually_exclusive_group()
-        ttl_group.add_argument('--ttl', type=int, help="TTL")
+        ttl_group.add_argument('--ttl', type=int, help='TTL')
         ttl_group.add_argument('--no-ttl', action='store_true')
 
         common.add_all_common_options(parser)
@@ -231,7 +231,7 @@ class SetRecordSetCommand(command.ShowOne):
         all_records = parsed_args.record or parsed_args.records
         if parsed_args.records:
             self.log.warning(
-                "Option --records is deprecated, use --record instead.")
+                'Option --records is deprecated, use --record instead.')
 
         if all_records:
             data['records'] = all_records
@@ -253,10 +253,10 @@ class DeleteRecordSetCommand(command.ShowOne):
     """Delete recordset"""
 
     def get_parser(self, prog_name):
-        parser = super(DeleteRecordSetCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('zone_id', help="Zone ID")
-        parser.add_argument('id', help="RecordSet ID")
+        parser.add_argument('zone_id', help='Zone ID')
+        parser.add_argument('id', help='RecordSet ID')
 
         common.add_all_common_options(parser)
         common.add_edit_managed_option(parser)
diff --git a/designateclient/v2/cli/reverse.py b/designateclient/v2/cli/reverse.py
index 11d53832..668cdf14 100644
--- a/designateclient/v2/cli/reverse.py
+++ b/designateclient/v2/cli/reverse.py
@@ -37,7 +37,7 @@ class ListFloatingIPCommand(command.Lister):
     columns = ['id', 'ptrdname', 'description', 'ttl']
 
     def get_parser(self, prog_name):
-        parser = super(ListFloatingIPCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
         common.add_all_common_options(parser)
 
@@ -56,10 +56,10 @@ class ShowFloatingIPCommand(command.ShowOne):
     """Show floatingip ptr record details"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowFloatingIPCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('floatingip_id', help="Floating IP ID in format "
-                            "region:floatingip_id")
+        parser.add_argument('floatingip_id', help='Floating IP ID in format '
+                            'region:floatingip_id')
 
         common.add_all_common_options(parser)
 
@@ -77,18 +77,18 @@ class SetFloatingIPCommand(command.ShowOne):
     """Set floatingip ptr record"""
 
     def get_parser(self, prog_name):
-        parser = super(SetFloatingIPCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('floatingip_id', help="Floating IP ID in format "
-                            "region:floatingip_id")
-        parser.add_argument('ptrdname', help="PTRD Name")
+        parser.add_argument('floatingip_id', help='Floating IP ID in format '
+                            'region:floatingip_id')
+        parser.add_argument('ptrdname', help='PTRD Name')
 
         description_group = parser.add_mutually_exclusive_group()
-        description_group.add_argument('--description', help="Description")
+        description_group.add_argument('--description', help='Description')
         description_group.add_argument('--no-description', action='store_true')
 
         ttl_group = parser.add_mutually_exclusive_group()
-        ttl_group.add_argument('--ttl', type=int, help="TTL")
+        ttl_group.add_argument('--ttl', type=int, help='TTL')
         ttl_group.add_argument('--no-ttl', action='store_true')
 
         common.add_all_common_options(parser)
@@ -125,10 +125,10 @@ class UnsetFloatingIPCommand(command.Command):
     """Unset floatingip ptr record"""
 
     def get_parser(self, prog_name):
-        parser = super(UnsetFloatingIPCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('floatingip_id', help="Floating IP ID in format "
-                            "region:floatingip_id")
+        parser.add_argument('floatingip_id', help='Floating IP ID in format '
+                            'region:floatingip_id')
 
         common.add_all_common_options(parser)
 
diff --git a/designateclient/v2/cli/service_statuses.py b/designateclient/v2/cli/service_statuses.py
index c7b4179a..19222757 100644
--- a/designateclient/v2/cli/service_statuses.py
+++ b/designateclient/v2/cli/service_statuses.py
@@ -27,10 +27,10 @@ LOG = logging.getLogger(__name__)
 
 
 def _format_status(status):
-    status.pop("links", None)
+    status.pop('links', None)
     # Remove unneeded fields for display output formatting
-    for k in ("capabilities", "stats"):
-        status[k] = "\n".join(status[k]) if status[k] else "-"
+    for k in ('capabilities', 'stats'):
+        status[k] = '\n'.join(status[k]) if status[k] else '-'
     return status
 
 
@@ -41,12 +41,12 @@ class ListServiceStatusesCommand(command.Lister):
                'capabilities']
 
     def get_parser(self, prog_name):
-        parser = super(ListServiceStatusesCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument("--hostname", help="Hostname", required=False)
-        parser.add_argument("--service_name", help="Service Name",
+        parser.add_argument('--hostname', help='Hostname', required=False)
+        parser.add_argument('--service_name', help='Service Name',
                             required=False)
-        parser.add_argument("--status", help="Status", required=False)
+        parser.add_argument('--status', help='Status', required=False)
         common.add_all_common_options(parser)
 
         return parser
@@ -58,7 +58,7 @@ class ListServiceStatusesCommand(command.Lister):
         cols = self.columns
 
         criterion = {}
-        for i in ["hostname", "service_name", "status"]:
+        for i in ['hostname', 'service_name', 'status']:
             v = getattr(parsed_args, i)
             if v is not None:
                 criterion[i] = v
@@ -76,9 +76,9 @@ class ShowServiceStatusCommand(command.ShowOne):
     """Show service status details"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowServiceStatusCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Service Status ID")
+        parser.add_argument('id', help='Service Status ID')
 
         common.add_all_common_options(parser)
 
diff --git a/designateclient/v2/cli/tlds.py b/designateclient/v2/cli/tlds.py
index 7ffe8847..227d710c 100644
--- a/designateclient/v2/cli/tlds.py
+++ b/designateclient/v2/cli/tlds.py
@@ -37,11 +37,11 @@ class ListTLDsCommand(command.Lister):
     columns = ['id', 'name', 'description']
 
     def get_parser(self, prog_name):
-        parser = super(ListTLDsCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('--name', help="TLD NAME")
+        parser.add_argument('--name', help='TLD NAME')
 
-        parser.add_argument('--description', help="TLD Description")
+        parser.add_argument('--description', help='TLD Description')
 
         common.add_all_common_options(parser)
 
@@ -61,9 +61,9 @@ class ShowTLDCommand(command.ShowOne):
     """Show tld details"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowTLDCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="TLD name or ID")
+        parser.add_argument('id', help='TLD name or ID')
 
         common.add_all_common_options(parser)
 
@@ -81,10 +81,10 @@ class CreateTLDCommand(command.ShowOne):
     """Create new tld"""
 
     def get_parser(self, prog_name):
-        parser = super(CreateTLDCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('--name', help="TLD Name", required=True)
-        parser.add_argument('--description', help="Description")
+        parser.add_argument('--name', help='TLD Name', required=True)
+        parser.add_argument('--description', help='Description')
 
         common.add_all_common_options(parser)
 
@@ -102,12 +102,12 @@ class SetTLDCommand(command.ShowOne):
     """Set tld properties"""
 
     def get_parser(self, prog_name):
-        parser = super(SetTLDCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="TLD name or ID")
-        parser.add_argument('--name', help="TLD Name")
+        parser.add_argument('id', help='TLD name or ID')
+        parser.add_argument('--name', help='TLD Name')
         description_group = parser.add_mutually_exclusive_group()
-        description_group.add_argument('--description', help="Description")
+        description_group.add_argument('--description', help='Description')
         description_group.add_argument('--no-description', action='store_true')
 
         common.add_all_common_options(parser)
@@ -137,9 +137,9 @@ class DeleteTLDCommand(command.Command):
     """Delete tld"""
 
     def get_parser(self, prog_name):
-        parser = super(DeleteTLDCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="TLD name or ID")
+        parser.add_argument('id', help='TLD name or ID')
 
         common.add_all_common_options(parser)
 
diff --git a/designateclient/v2/cli/tsigkeys.py b/designateclient/v2/cli/tsigkeys.py
index 587dfe7e..9c046fcf 100644
--- a/designateclient/v2/cli/tsigkeys.py
+++ b/designateclient/v2/cli/tsigkeys.py
@@ -36,12 +36,12 @@ class ListTSIGKeysCommand(command.Lister):
     columns = ['id', 'name', 'algorithm', 'secret', 'scope', 'resource_id']
 
     def get_parser(self, prog_name):
-        parser = super(ListTSIGKeysCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('--name', help="TSIGKey NAME", required=False)
-        parser.add_argument('--algorithm', help="TSIGKey algorithm",
+        parser.add_argument('--name', help='TSIGKey NAME', required=False)
+        parser.add_argument('--algorithm', help='TSIGKey algorithm',
                             required=False)
-        parser.add_argument('--scope', help="TSIGKey scope", required=False)
+        parser.add_argument('--scope', help='TSIGKey scope', required=False)
 
         common.add_all_common_options(parser)
 
@@ -53,11 +53,11 @@ class ListTSIGKeysCommand(command.Lister):
 
         criterion = {}
         if parsed_args.name is not None:
-            criterion["name"] = parsed_args.name
+            criterion['name'] = parsed_args.name
         if parsed_args.algorithm is not None:
-            criterion["algorithm"] = parsed_args.algorithm
+            criterion['algorithm'] = parsed_args.algorithm
         if parsed_args.scope is not None:
-            criterion["scope"] = parsed_args.scope
+            criterion['scope'] = parsed_args.scope
 
         data = get_all(client.tsigkeys.list, criterion)
 
@@ -69,9 +69,9 @@ class ShowTSIGKeyCommand(command.ShowOne):
     """Show tsigkey details"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowTSIGKeyCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="TSIGKey ID")
+        parser.add_argument('id', help='TSIGKey ID')
 
         common.add_all_common_options(parser)
 
@@ -89,14 +89,14 @@ class CreateTSIGKeyCommand(command.ShowOne):
     """Create new tsigkey"""
 
     def get_parser(self, prog_name):
-        parser = super(CreateTSIGKeyCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('--name', help="TSIGKey Name", required=True)
-        parser.add_argument('--algorithm', help="TSIGKey algorithm",
+        parser.add_argument('--name', help='TSIGKey Name', required=True)
+        parser.add_argument('--algorithm', help='TSIGKey algorithm',
                             required=True)
-        parser.add_argument('--secret', help="TSIGKey secret", required=True)
-        parser.add_argument('--scope', help="TSIGKey scope", required=True)
-        parser.add_argument('--resource-id', help="TSIGKey resource_id",
+        parser.add_argument('--secret', help='TSIGKey secret', required=True)
+        parser.add_argument('--scope', help='TSIGKey scope', required=True)
+        parser.add_argument('--resource-id', help='TSIGKey resource_id',
                             required=True)
 
         common.add_all_common_options(parser)
@@ -117,13 +117,13 @@ class SetTSIGKeyCommand(command.ShowOne):
     """Set tsigkey properties"""
 
     def get_parser(self, prog_name):
-        parser = super(SetTSIGKeyCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="TSIGKey ID")
-        parser.add_argument('--name', help="TSIGKey Name")
-        parser.add_argument('--algorithm', help="TSIGKey algorithm")
-        parser.add_argument('--secret', help="TSIGKey secret")
-        parser.add_argument('--scope', help="TSIGKey scope")
+        parser.add_argument('id', help='TSIGKey ID')
+        parser.add_argument('--name', help='TSIGKey Name')
+        parser.add_argument('--algorithm', help='TSIGKey algorithm')
+        parser.add_argument('--secret', help='TSIGKey secret')
+        parser.add_argument('--scope', help='TSIGKey scope')
 
         common.add_all_common_options(parser)
 
@@ -153,9 +153,9 @@ class DeleteTSIGKeyCommand(command.Command):
     """Delete tsigkey"""
 
     def get_parser(self, prog_name):
-        parser = super(DeleteTSIGKeyCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="TSIGKey ID")
+        parser.add_argument('id', help='TSIGKey ID')
 
         common.add_all_common_options(parser)
 
diff --git a/designateclient/v2/cli/zones.py b/designateclient/v2/cli/zones.py
index d23d7462..9e034445 100644
--- a/designateclient/v2/cli/zones.py
+++ b/designateclient/v2/cli/zones.py
@@ -29,10 +29,10 @@ LOG = logging.getLogger(__name__)
 
 def _format_zone(zone):
     zone.pop('links', None)
-    zone['masters'] = ", ".join(zone['masters'])
+    zone['masters'] = ', '.join(zone['masters'])
     attrib = ''
     for attr in zone['attributes']:
-        attrib += "%s:%s\n" % (attr, zone['attributes'][attr])
+        attrib += '{}:{}\n'.format(attr, zone['attributes'][attr])
     zone['attributes'] = attrib
 
 
@@ -50,19 +50,19 @@ class ListZonesCommand(command.Lister):
     columns = ['id', 'name', 'type', 'serial', 'status', 'action']
 
     def get_parser(self, prog_name):
-        parser = super(ListZonesCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('--name', help="Zone Name", required=False)
-        parser.add_argument('--email', help="Zone Email", required=False)
-        parser.add_argument('--type', help="Zone Type",
-                            choices=["PRIMARY", "SECONDARY"],
+        parser.add_argument('--name', help='Zone Name', required=False)
+        parser.add_argument('--email', help='Zone Email', required=False)
+        parser.add_argument('--type', help='Zone Type',
+                            choices=['PRIMARY', 'SECONDARY'],
                             default=None,
                             required=False)
-        parser.add_argument('--ttl', help="Time To Live (Seconds)",
+        parser.add_argument('--ttl', help='Time To Live (Seconds)',
                             required=False)
-        parser.add_argument('--description', help="Description",
+        parser.add_argument('--description', help='Description',
                             required=False)
-        parser.add_argument('--status', help="Zone Status", required=False)
+        parser.add_argument('--status', help='Zone Status', required=False)
 
         common.add_all_common_options(parser)
 
@@ -74,22 +74,22 @@ class ListZonesCommand(command.Lister):
 
         criterion = {}
         if parsed_args.type is not None:
-            criterion["type"] = parsed_args.type
+            criterion['type'] = parsed_args.type
 
         if parsed_args.name is not None:
-            criterion["name"] = parsed_args.name
+            criterion['name'] = parsed_args.name
 
         if parsed_args.ttl is not None:
-            criterion["ttl"] = parsed_args.ttl
+            criterion['ttl'] = parsed_args.ttl
 
         if parsed_args.description is not None:
-            criterion["description"] = parsed_args.description
+            criterion['description'] = parsed_args.description
 
         if parsed_args.email is not None:
-            criterion["email"] = parsed_args.email
+            criterion['email'] = parsed_args.email
 
         if parsed_args.status is not None:
-            criterion["status"] = parsed_args.status
+            criterion['status'] = parsed_args.status
 
         data = get_all(client.zones.list, criterion)
 
@@ -105,9 +105,9 @@ class ShowZoneCommand(command.ShowOne):
     """Show zone details"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowZoneCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Zone ID")
+        parser.add_argument('id', help='Zone ID')
 
         common.add_all_common_options(parser)
 
@@ -127,17 +127,17 @@ class CreateZoneCommand(command.ShowOne):
     """Create new zone"""
 
     def get_parser(self, prog_name):
-        parser = super(CreateZoneCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('name', help="Zone Name")
-        parser.add_argument('--email', help="Zone Email")
-        parser.add_argument('--type', help="Zone Type",
-                            choices=["PRIMARY", "SECONDARY"],
+        parser.add_argument('name', help='Zone Name')
+        parser.add_argument('--email', help='Zone Email')
+        parser.add_argument('--type', help='Zone Type',
+                            choices=['PRIMARY', 'SECONDARY'],
                             default='PRIMARY')
-        parser.add_argument('--ttl', type=int, help="Time To Live (Seconds)")
-        parser.add_argument('--description', help="Description")
-        parser.add_argument('--masters', help="Zone Masters", nargs='+')
-        parser.add_argument('--attributes', help="Zone Attributes", nargs='+')
+        parser.add_argument('--ttl', type=int, help='Time To Live (Seconds)')
+        parser.add_argument('--description', help='Description')
+        parser.add_argument('--masters', help='Zone Masters', nargs='+')
+        parser.add_argument('--attributes', help='Zone Attributes', nargs='+')
 
         common.add_all_common_options(parser)
 
@@ -150,36 +150,39 @@ class CreateZoneCommand(command.ShowOne):
         payload = {}
 
         if parsed_args.description:
-            payload["description"] = parsed_args.description
+            payload['description'] = parsed_args.description
 
         if parsed_args.attributes:
-            payload["attributes"] = {}
+            payload['attributes'] = {}
             for attr in parsed_args.attributes:
                 try:
                     k, v = attr.split(':')
-                    payload["attributes"][k] = v
+                    payload['attributes'][k] = v
                 except ValueError:
-                    msg = ("Attribute '%s' is in an incorrect format. "
-                           "Attributes are <key>:<value> formated")
-                    raise osc_exc.CommandError(msg % attr)
+                    raise osc_exc.CommandError(
+                        f"Attribute '{attr}' is in an incorrect format. "
+                        "Attributes are <key>:<value> formated"
+                    )
 
         if parsed_args.type == 'PRIMARY':
             # email is just for PRIMARY.
             if not parsed_args.email:
-                msg = "Zone type PRIMARY requires --email."
-                raise osc_exc.CommandError(msg)
+                raise osc_exc.CommandError(
+                    'Zone type PRIMARY requires --email.'
+                )
 
-            payload["email"] = parsed_args.email
+            payload['email'] = parsed_args.email
 
             # TTL is just valid for PRIMARY
             if parsed_args.ttl is not None:
-                payload["ttl"] = parsed_args.ttl
+                payload['ttl'] = parsed_args.ttl
         elif parsed_args.type == 'SECONDARY':
-            payload["masters"] = parsed_args.masters
+            payload['masters'] = parsed_args.masters
         else:
-            msg = ("Type %s is not supported. Please choose between "
-                   "PRIMARY or SECONDARY")
-            raise osc_exc.CommandError(msg % parsed_args.type)
+            raise osc_exc.CommandError(
+                f'Type {parsed_args.type} is not supported. Please choose '
+                'between PRIMARY or SECONDARY'
+            )
 
         data = client.zones.create(
             parsed_args.name, parsed_args.type, **payload)
@@ -192,16 +195,16 @@ class SetZoneCommand(command.ShowOne):
     """Set zone properties"""
 
     def get_parser(self, prog_name):
-        parser = super(SetZoneCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Zone ID")
-        parser.add_argument('--email', help="Zone Email")
-        parser.add_argument('--ttl', type=int, help="Time To Live (Seconds)")
+        parser.add_argument('id', help='Zone ID')
+        parser.add_argument('--email', help='Zone Email')
+        parser.add_argument('--ttl', type=int, help='Time To Live (Seconds)')
         description_group = parser.add_mutually_exclusive_group()
-        description_group.add_argument('--description', help="Description")
+        description_group.add_argument('--description', help='Description')
         description_group.add_argument('--no-description', action='store_true')
 
-        parser.add_argument('--masters', help="Zone Masters", nargs='+')
+        parser.add_argument('--masters', help='Zone Masters', nargs='+')
 
         common.add_all_common_options(parser)
 
@@ -237,9 +240,9 @@ class DeleteZoneCommand(command.ShowOne):
     """Delete zone"""
 
     def get_parser(self, prog_name):
-        parser = super(DeleteZoneCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Zone ID")
+        parser.add_argument('id', help='Zone ID')
 
         parser.add_argument('--delete-shares', default=False,
                             action='store_true',
@@ -270,9 +273,9 @@ class DeleteZoneCommand(command.ShowOne):
 class AbandonZoneCommand(command.Command):
     """Abandon a zone"""
     def get_parser(self, prog_name):
-        parser = super(AbandonZoneCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Zone ID")
+        parser.add_argument('id', help='Zone ID')
 
         common.add_all_common_options(parser)
 
@@ -284,16 +287,16 @@ class AbandonZoneCommand(command.Command):
 
         client.zones.abandon(parsed_args.id)
 
-        LOG.info("Z %(zone_id)s abandoned",
-                 {"zone_id": parsed_args.id})
+        LOG.info('Z %(zone_id)s abandoned',
+                 {'zone_id': parsed_args.id})
 
 
 class AXFRZoneCommand(command.Command):
     """AXFR a zone"""
     def get_parser(self, prog_name):
-        parser = super(AXFRZoneCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Zone ID")
+        parser.add_argument('id', help='Zone ID')
 
         common.add_all_common_options(parser)
 
@@ -305,22 +308,22 @@ class AXFRZoneCommand(command.Command):
 
         client.zones.axfr(parsed_args.id)
 
-        LOG.info("Scheduled AXFR for zone %(zone_id)s",
-                 {"zone_id": parsed_args.id})
+        LOG.info('Scheduled AXFR for zone %(zone_id)s',
+                 {'zone_id': parsed_args.id})
 
 
 class CreateTransferRequestCommand(command.ShowOne):
     """Create new zone transfer request"""
 
     def get_parser(self, prog_name):
-        parser = super(CreateTransferRequestCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
-        parser.add_argument('zone_id', help="Zone ID to transfer.",)
+        parser.add_argument('zone_id', help='Zone ID to transfer.',)
         parser.add_argument(
             '--target-project-id',
-            help="Target Project ID to transfer to.")
-        parser.add_argument('--description', help="Description")
+            help='Target Project ID to transfer to.')
+        parser.add_argument('--description', help='Description')
 
         common.add_all_common_options(parser)
 
@@ -343,7 +346,7 @@ class ListTransferRequestsCommand(command.Lister):
                'target_project_id', 'status', 'key']
 
     def get_parser(self, prog_name):
-        parser = super(ListTransferRequestsCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
         common.add_all_common_options(parser)
@@ -364,9 +367,9 @@ class ShowTransferRequestCommand(command.ShowOne):
     """Show Zone Transfer Request Details"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowTransferRequestCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Zone Tranfer Request ID")
+        parser.add_argument('id', help='Zone Tranfer Request ID')
 
         common.add_all_common_options(parser)
 
@@ -385,16 +388,16 @@ class SetTransferRequestCommand(command.ShowOne):
     """Set a Zone Transfer Request"""
 
     def get_parser(self, prog_name):
-        parser = super(SetTransferRequestCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Zone Transfer Request ID")
+        parser.add_argument('id', help='Zone Transfer Request ID')
         description_group = parser.add_mutually_exclusive_group()
-        description_group.add_argument('--description', help="Description")
+        description_group.add_argument('--description', help='Description')
         description_group.add_argument('--no-description', action='store_true')
 
         parser.add_argument(
             '--target-project-id',
-            help="Target Project ID to transfer to.")
+            help='Target Project ID to transfer to.')
 
         common.add_all_common_options(parser)
 
@@ -421,10 +424,10 @@ class SetTransferRequestCommand(command.ShowOne):
 class DeleteTransferRequestCommand(command.Command):
     """Delete a Zone Transfer Request"""
     def get_parser(self, prog_name):
-        parser = super(DeleteTransferRequestCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
-        parser.add_argument('id', help="Zone Transfer Request ID")
+        parser.add_argument('id', help='Zone Transfer Request ID')
 
         common.add_all_common_options(parser)
 
@@ -443,12 +446,12 @@ class AcceptTransferRequestCommand(command.ShowOne):
     """Accept a Zone Transfer Request"""
 
     def get_parser(self, prog_name):
-        parser = super(AcceptTransferRequestCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
-        parser.add_argument('--transfer-id', help="Transfer ID", type=str,
+        parser.add_argument('--transfer-id', help='Transfer ID', type=str,
                             required=True)
-        parser.add_argument('--key', help="Transfer Key", type=str,
+        parser.add_argument('--key', help='Transfer Key', type=str,
                             required=True)
 
         common.add_all_common_options(parser)
@@ -471,7 +474,7 @@ class ListTransferAcceptsCommand(command.Lister):
                'zone_transfer_request_id', 'status', 'key']
 
     def get_parser(self, prog_name):
-        parser = super(ListTransferAcceptsCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
         common.add_all_common_options(parser)
@@ -492,9 +495,9 @@ class ShowTransferAcceptCommand(command.ShowOne):
     """Show Zone Transfer Accept"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowTransferAcceptCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
-        parser.add_argument('id', help="Zone Tranfer Accept ID")
+        parser.add_argument('id', help='Zone Tranfer Accept ID')
 
         common.add_all_common_options(parser)
 
@@ -513,12 +516,12 @@ class ExportZoneCommand(command.ShowOne):
     """Export a Zone"""
 
     def get_parser(self, prog_name):
-        parser = super(ExportZoneCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
         common.add_all_common_options(parser)
 
-        parser.add_argument('zone_id', help="Zone ID", type=str)
+        parser.add_argument('zone_id', help='Zone ID', type=str)
 
         return parser
 
@@ -545,7 +548,7 @@ class ListZoneExportsCommand(command.Lister):
     ]
 
     def get_parser(self, prog_name):
-        parser = super(ListZoneExportsCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
         common.add_all_common_options(parser)
@@ -567,10 +570,10 @@ class ShowZoneExportCommand(command.ShowOne):
     """Show a Zone Export"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowZoneExportCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
-        parser.add_argument('zone_export_id', help="Zone Export ID", type=str)
+        parser.add_argument('zone_export_id', help='Zone Export ID', type=str)
 
         common.add_all_common_options(parser)
 
@@ -591,10 +594,10 @@ class DeleteZoneExportCommand(command.Command):
     """Delete a Zone Export"""
 
     def get_parser(self, prog_name):
-        parser = super(DeleteZoneExportCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
-        parser.add_argument('zone_export_id', help="Zone Export ID", type=str)
+        parser.add_argument('zone_export_id', help='Zone Export ID', type=str)
 
         common.add_all_common_options(parser)
 
@@ -613,10 +616,10 @@ class ShowZoneExportFileCommand(command.ShowOne):
     """Show the zone file for the Zone Export"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowZoneExportFileCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
-        parser.add_argument('zone_export_id', help="Zone Export ID", type=str)
+        parser.add_argument('zone_export_id', help='Zone Export ID', type=str)
 
         common.add_all_common_options(parser)
 
@@ -635,11 +638,11 @@ class ImportZoneCommand(command.ShowOne):
     """Import a Zone from a file on the filesystem"""
 
     def get_parser(self, prog_name):
-        parser = super(ImportZoneCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
         parser.add_argument('zone_file_path',
-                            help="Path to a zone file", type=str)
+                            help='Path to a zone file', type=str)
 
         common.add_all_common_options(parser)
 
@@ -649,7 +652,7 @@ class ImportZoneCommand(command.ShowOne):
         client = self.app.client_manager.dns
         common.set_all_common_headers(client, parsed_args)
 
-        with open(parsed_args.zone_file_path, 'r') as f:
+        with open(parsed_args.zone_file_path) as f:
             zone_file_contents = f.read()
 
         data = client.zone_imports.create(zone_file_contents)
@@ -672,7 +675,7 @@ class ListZoneImportsCommand(command.Lister):
     ]
 
     def get_parser(self, prog_name):
-        parser = super(ListZoneImportsCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
         common.add_all_common_options(parser)
@@ -694,10 +697,10 @@ class ShowZoneImportCommand(command.ShowOne):
     """Show a Zone Import"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowZoneImportCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
-        parser.add_argument('zone_import_id', help="Zone Import ID", type=str)
+        parser.add_argument('zone_import_id', help='Zone Import ID', type=str)
 
         common.add_all_common_options(parser)
 
@@ -718,10 +721,10 @@ class DeleteZoneImportCommand(command.Command):
     """Delete a Zone Import"""
 
     def get_parser(self, prog_name):
-        parser = super(DeleteZoneImportCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
-        parser.add_argument('zone_import_id', help="Zone Import ID", type=str)
+        parser.add_argument('zone_import_id', help='Zone Import ID', type=str)
 
         common.add_all_common_options(parser)
 
@@ -740,7 +743,7 @@ class ShareZoneCommand(command.ShowOne):
     """Share a Zone"""
 
     def get_parser(self, prog_name):
-        parser = super(ShareZoneCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
         common.add_all_common_options(parser)
@@ -777,7 +780,7 @@ class ListSharedZonesCommand(command.Lister):
     ]
 
     def get_parser(self, prog_name):
-        parser = super(ListSharedZonesCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
         common.add_all_common_options(parser)
@@ -812,7 +815,7 @@ class ShowSharedZoneCommand(command.ShowOne):
     """Show Zone Share Details"""
 
     def get_parser(self, prog_name):
-        parser = super(ShowSharedZoneCommand, self).get_parser(prog_name)
+        parser = super().get_parser(prog_name)
 
         parser.add_argument('zone', help='The zone name or ID to share.')
         parser.add_argument('shared_zone_id',
@@ -837,7 +840,7 @@ class DeleteSharedZoneCommand(command.Command):
     """Delete a Zone Share"""
 
     def get_parser(self, prog_name):
-        parser = super(DeleteSharedZoneCommand, self).get_parser(
+        parser = super().get_parser(
             prog_name)
 
         parser.add_argument('zone', help='The zone name or ID to share.')
diff --git a/designateclient/v2/client.py b/designateclient/v2/client.py
index 053275ce..ebc2e26d 100644
--- a/designateclient/v2/client.py
+++ b/designateclient/v2/client.py
@@ -116,7 +116,7 @@ class DesignateAdapter(adapter.LegacyJsonAdapter):
         return response, body
 
 
-class Client(object):
+class Client:
     def __init__(self, region_name=None, endpoint_type='publicURL',
                  extensions=None, service_type='dns', service_name=None,
                  http_log_debug=False, session=None, auth=None, timeout=None,
@@ -131,7 +131,7 @@ class Client(object):
             region_name=region_name,
             service_type=service_type,
             interface=endpoint_type.rstrip('URL'),
-            user_agent='python-designateclient-%s' % version.version_info,
+            user_agent=f'python-designateclient-{version.version_info}',
             version=('2'),
             endpoint_override=endpoint_override,
             timeout=timeout,
diff --git a/designateclient/v2/nameservers.py b/designateclient/v2/nameservers.py
index b35649d3..7b64b7b6 100644
--- a/designateclient/v2/nameservers.py
+++ b/designateclient/v2/nameservers.py
@@ -21,6 +21,6 @@ class NameServerController(V2Controller):
     def list(self, zone):
         zone = v2_utils.resolve_by_name(self.client.zones.list, zone)
 
-        url = '/zones/%s/nameservers' % zone
+        url = f'/zones/{zone}/nameservers'
 
         return self._get(url, response_key='nameservers')
diff --git a/designateclient/v2/quotas.py b/designateclient/v2/quotas.py
index 6377a411..059529f2 100644
--- a/designateclient/v2/quotas.py
+++ b/designateclient/v2/quotas.py
@@ -18,10 +18,10 @@ from designateclient.v2.base import V2Controller
 
 class QuotasController(V2Controller):
     def list(self, project_id):
-        return self._get('/quotas/%s' % project_id)
+        return self._get(f'/quotas/{project_id}')
 
     def update(self, project_id, values):
-        return self._patch('/quotas/%s' % project_id, data=values)
+        return self._patch(f'/quotas/{project_id}', data=values)
 
     def reset(self, project_id):
-        return self._delete('/quotas/%s' % project_id)
+        return self._delete(f'/quotas/{project_id}')
diff --git a/designateclient/v2/recordsets.py b/designateclient/v2/recordsets.py
index e6904fcd..93b5cb2f 100644
--- a/designateclient/v2/recordsets.py
+++ b/designateclient/v2/recordsets.py
@@ -32,11 +32,11 @@ class RecordSetController(V2Controller):
 
         # We where given a name like "www" vs www.i.io., attempt to fix it on
         # the behalf of the actor.
-        if not name.endswith("."):
+        if not name.endswith('.'):
             if not isinstance(zone_info, dict):
                 zone_info = self.client.zones.get(zone)
 
-            name = "%s.%s" % (name, zone_info["name"])
+            name = '{}.{}'.format(name, zone_info['name'])
 
         return name, zone_info
 
@@ -57,24 +57,22 @@ class RecordSetController(V2Controller):
             data['description'] = description
 
         if zone_info is not None:
-            zone_id = zone_info["id"]
+            zone_id = zone_info['id']
         else:
             zone_id = zone
 
-        url = '/zones/%s/recordsets' % zone_id
-        return self._post(url, data=data)
+        return self._post(f'/zones/{zone_id}/recordsets', data=data)
 
     def list(self, zone, criterion=None, marker=None, limit=None):
         zone = v2_utils.resolve_by_name(self.client.zones.list, zone)
 
         url = self.build_url(
-            '/zones/%s/recordsets' % zone,
-            criterion, marker, limit)
+            f'/zones/{zone}/recordsets', criterion, marker, limit
+        )
 
         return self._get(url, response_key='recordsets')
 
     def list_all_zones(self, criterion=None, marker=None, limit=None):
-
         url = self.build_url('/recordsets', criterion, marker, limit)
 
         return self._get(url, response_key='recordsets')
@@ -83,8 +81,7 @@ class RecordSetController(V2Controller):
         zone = v2_utils.resolve_by_name(self.client.zones.list, zone)
         recordset = v2_utils.resolve_by_name(self.list, recordset, zone)
 
-        url = self.build_url('/zones/%s/recordsets/%s' % (
-                             zone, recordset))
+        url = self.build_url(f'/zones/{zone}/recordsets/{recordset}')
 
         return self._get(url)
 
@@ -92,7 +89,7 @@ class RecordSetController(V2Controller):
         zone = v2_utils.resolve_by_name(self.client.zones.list, zone)
         recordset = v2_utils.resolve_by_name(self.list, recordset, zone)
 
-        url = '/zones/%s/recordsets/%s' % (zone, recordset)
+        url = f'/zones/{zone}/recordsets/{recordset}'
 
         return self._put(url, data=values)
 
@@ -100,6 +97,6 @@ class RecordSetController(V2Controller):
         zone = v2_utils.resolve_by_name(self.client.zones.list, zone)
         recordset = v2_utils.resolve_by_name(self.list, recordset, zone)
 
-        url = '/zones/%s/recordsets/%s' % (zone, recordset)
+        url = f'/zones/{zone}/recordsets/{recordset}'
 
         return self._delete(url)
diff --git a/designateclient/v2/reverse.py b/designateclient/v2/reverse.py
index 3df78fa1..840844f6 100644
--- a/designateclient/v2/reverse.py
+++ b/designateclient/v2/reverse.py
@@ -23,12 +23,12 @@ class FloatingIPController(V2Controller):
         }
 
         if description is not None:
-            data["description"] = description
+            data['description'] = description
 
         if ttl is not None:
-            data["ttl"] = ttl
+            data['ttl'] = ttl
 
-        url = '/reverse/floatingips/%s' % floatingip_id
+        url = f'/reverse/floatingips/{floatingip_id}'
         return self._patch(url, data=data)
 
     def list(self, criterion=None):
@@ -37,13 +37,13 @@ class FloatingIPController(V2Controller):
         return self._get(url, response_key='floatingips')
 
     def get(self, floatingip_id):
-        url = '/reverse/floatingips/%s' % floatingip_id
+        url = f'/reverse/floatingips/{floatingip_id}'
 
         return self._get(url)
 
     def unset(self, floatingip_id):
-        data = {"ptrdname": None}
+        data = {'ptrdname': None}
 
-        url = '/reverse/floatingips/%s' % floatingip_id
+        url = f'/reverse/floatingips/{floatingip_id}'
 
         return self._patch(url, data=data)
diff --git a/designateclient/v2/service_statuses.py b/designateclient/v2/service_statuses.py
index 9477e97c..71cff9b3 100644
--- a/designateclient/v2/service_statuses.py
+++ b/designateclient/v2/service_statuses.py
@@ -20,9 +20,9 @@ class ServiceStatusesController(base.V2Controller):
     def list(self, criterion=None, marker=None, limit=None):
         url = self.build_url('/service_statuses', criterion, marker, limit)
 
-        return self._get(url, response_key="service_statuses")
+        return self._get(url, response_key='service_statuses')
 
     def get(self, service_status_id):
-        url = '/service_statuses/%s' % service_status_id
+        url = f'/service_statuses/{service_status_id}'
 
         return self._get(url)
diff --git a/designateclient/v2/tlds.py b/designateclient/v2/tlds.py
index d70c88ab..cfeb4895 100644
--- a/designateclient/v2/tlds.py
+++ b/designateclient/v2/tlds.py
@@ -24,7 +24,7 @@ class TLDController(V2Controller):
         }
 
         if description is not None:
-            data["description"] = description
+            data['description'] = description
 
         return self._post('/tlds', data=data)
 
@@ -36,14 +36,14 @@ class TLDController(V2Controller):
     def get(self, tld):
         tld = v2_utils.resolve_by_name(self.list, tld)
 
-        return self._get('/tlds/%s' % tld)
+        return self._get(f'/tlds/{tld}')
 
     def update(self, tld, values):
         tld = v2_utils.resolve_by_name(self.list, tld)
 
-        return self._patch('/tlds/%s' % tld, data=values)
+        return self._patch(f'/tlds/{tld}', data=values)
 
     def delete(self, tld):
         tld = v2_utils.resolve_by_name(self.list, tld)
 
-        return self._delete('/tlds/%s' % tld)
+        return self._delete(f'/tlds/{tld}')
diff --git a/designateclient/v2/tsigkeys.py b/designateclient/v2/tsigkeys.py
index 988700fb..e3162dae 100644
--- a/designateclient/v2/tsigkeys.py
+++ b/designateclient/v2/tsigkeys.py
@@ -37,14 +37,14 @@ class TSIGKeysController(V2Controller):
     def get(self, tsigkey):
         tsigkey = v2_utils.resolve_by_name(self.list, tsigkey)
 
-        return self._get('/tsigkeys/%s' % tsigkey)
+        return self._get(f'/tsigkeys/{tsigkey}')
 
     def update(self, tsigkey, values):
         tsigkey = v2_utils.resolve_by_name(self.list, tsigkey)
 
-        return self._patch('/tsigkeys/%s' % tsigkey, data=values)
+        return self._patch(f'/tsigkeys/{tsigkey}', data=values)
 
     def delete(self, tsigkey):
         tsigkey = v2_utils.resolve_by_name(self.list, tsigkey)
 
-        return self._delete('/tsigkeys/%s' % tsigkey)
+        return self._delete(f'/tsigkeys/{tsigkey}')
diff --git a/designateclient/v2/utils.py b/designateclient/v2/utils.py
index 1c1b5afa..e741ff04 100644
--- a/designateclient/v2/utils.py
+++ b/designateclient/v2/utils.py
@@ -29,16 +29,17 @@ def resolve_by_name(func, name, *args):
     if uuidutils.is_uuid_like(name):
         return name
 
-    results = func(criterion={"name": "%s" % name}, *args)
+    results = func(criterion={"name": f"{name}"}, *args)
     length = len(results)
 
     if length == 1:
         return results[0]["id"]
     elif length == 0:
-        raise exceptions.NotFound("Name %s didn't resolve" % name)
+        raise exceptions.NotFound(f"Name {name} didn't resolve")
     else:
-        msg = "Multiple matches found for %s, please use ID instead." % name
-        raise exceptions.NoUniqueMatch(msg)
+        raise exceptions.NoUniqueMatch(
+            "Multiple matches found for {name}, please use ID instead."
+        )
 
 
 def parse_query_from_url(url):
diff --git a/designateclient/v2/zones.py b/designateclient/v2/zones.py
index 209d4f08..cfec73f6 100644
--- a/designateclient/v2/zones.py
+++ b/designateclient/v2/zones.py
@@ -20,52 +20,52 @@ from designateclient.v2 import utils as v2_utils
 class ZoneController(V2Controller):
     def create(self, name, type_=None, email=None, description=None, ttl=None,
                masters=None, attributes=None):
-        type_ = type_ or "PRIMARY"
+        type_ = type_ or 'PRIMARY'
 
         data = {
-            "name": name,
-            "type": type_
+            'name': name,
+            'type': type_
         }
 
-        if type_ == "PRIMARY":
+        if type_ == 'PRIMARY':
             if email:
-                data["email"] = email
+                data['email'] = email
 
             if ttl is not None:
-                data["ttl"] = ttl
+                data['ttl'] = ttl
 
-        elif type_ == "SECONDARY" and masters:
-            data["masters"] = masters
+        elif type_ == 'SECONDARY' and masters:
+            data['masters'] = masters
 
         if description is not None:
-            data["description"] = description
+            data['description'] = description
 
         if attributes is not None:
-            data["attributes"] = attributes
+            data['attributes'] = attributes
 
         return self._post('/zones', data=data)
 
     def list(self, criterion=None, marker=None, limit=None):
         url = self.build_url('/zones', criterion, marker, limit)
 
-        return self._get(url, response_key="zones")
+        return self._get(url, response_key='zones')
 
     def get(self, zone):
         zone = v2_utils.resolve_by_name(self.list, zone)
 
-        return self._get('/zones/%s' % zone)
+        return self._get(f'/zones/{zone}')
 
     def update(self, zone, values):
         zone = v2_utils.resolve_by_name(self.list, zone)
 
-        url = self.build_url('/zones/%s' % zone)
+        url = self.build_url(f'/zones/{zone}')
 
         return self._patch(url, data=values)
 
     def delete(self, zone, delete_shares=False):
         zone = v2_utils.resolve_by_name(self.list, zone)
 
-        url = self.build_url('/zones/%s' % zone)
+        url = self.build_url(f'/zones/{zone}')
 
         if delete_shares:
             headers = {'X-Designate-Delete-Shares': 'true'}
@@ -78,14 +78,14 @@ class ZoneController(V2Controller):
     def abandon(self, zone):
         zone = v2_utils.resolve_by_name(self.list, zone)
 
-        url = '/zones/%s/tasks/abandon' % zone
+        url = f'/zones/{zone}/tasks/abandon'
 
         self.client.session.post(url)
 
     def axfr(self, zone):
         zone = v2_utils.resolve_by_name(self.list, zone)
 
-        url = '/zones/%s/tasks/xfr' % zone
+        url = f'/zones/{zone}/tasks/xfr'
 
         self.client.session.post(url)
 
@@ -95,67 +95,67 @@ class ZoneTransfersController(V2Controller):
         zone = v2_utils.resolve_by_name(self.client.zones.list, zone)
 
         data = {
-            "target_project_id": target_project_id
+            'target_project_id': target_project_id
         }
 
         if description is not None:
-            data["description"] = description
+            data['description'] = description
 
-        url = '/zones/%s/tasks/transfer_requests' % zone
+        url = f'/zones/{zone}/tasks/transfer_requests'
 
         return self._post(url, data=data)
 
     def get_request(self, transfer_id):
-        url = '/zones/tasks/transfer_requests/%s' % transfer_id
+        url = f'/zones/tasks/transfer_requests/{transfer_id}'
         return self._get(url)
 
     def list_requests(self):
         url = '/zones/tasks/transfer_requests'
-        return self._get(url, response_key="transfer_requests")
+        return self._get(url, response_key='transfer_requests')
 
     def update_request(self, transfer_id, values):
-        url = '/zones/tasks/transfer_requests/%s' % transfer_id
+        url = f'/zones/tasks/transfer_requests/{transfer_id}'
         return self._patch(url, data=values)
 
     def delete_request(self, transfer_id):
-        url = '/zones/tasks/transfer_requests/%s' % transfer_id
+        url = f'/zones/tasks/transfer_requests/{transfer_id}'
         self._delete(url)
 
     def accept_request(self, transfer_id, key):
         url = '/zones/tasks/transfer_accepts'
 
         data = {
-            "key": key,
-            "zone_transfer_request_id": transfer_id
+            'key': key,
+            'zone_transfer_request_id': transfer_id
         }
         return self._post(url, data=data)
 
     def get_accept(self, accept_id):
-        url = '/zones/tasks/transfer_accepts/%s' % accept_id
+        url = f'/zones/tasks/transfer_accepts/{accept_id}'
         return self._get(url)
 
     def list_accepts(self):
         url = '/zones/tasks/transfer_accepts'
-        return self._get(url, response_key="transfer_accepts")
+        return self._get(url, response_key='transfer_accepts')
 
 
 class ZoneExportsController(V2Controller):
     def create(self, zone):
         zone_id = v2_utils.resolve_by_name(self.client.zones.list, zone)
 
-        return self._post('/zones/%s/tasks/export' % zone_id)
+        return self._post(f'/zones/{zone_id}/tasks/export')
 
     def get_export_record(self, zone_export_id):
-        return self._get('/zones/tasks/exports/%s' % zone_export_id)
+        return self._get(f'/zones/tasks/exports/{zone_export_id}')
 
     def list(self):
         return self._get('/zones/tasks/exports')
 
     def delete(self, zone_export_id):
-        return self._delete('/zones/tasks/exports/%s' % zone_export_id)
+        return self._delete(f'/zones/tasks/exports/{zone_export_id}')
 
     def get_export(self, zone_export_id):
-        return self._get('/zones/tasks/exports/%s/export' % zone_export_id,
+        return self._get(f'/zones/tasks/exports/{zone_export_id}/export',
                          headers={'Accept': 'text/dns'})
 
 
@@ -165,20 +165,20 @@ class ZoneImportsController(V2Controller):
                           headers={'Content-Type': 'text/dns'})
 
     def get_import_record(self, zone_import_id):
-        return self._get('/zones/tasks/imports/%s' % zone_import_id)
+        return self._get(f'/zones/tasks/imports/{zone_import_id}')
 
     def list(self):
         return self._get('/zones/tasks/imports')
 
     def delete(self, zone_import_id):
-        return self._delete('/zones/tasks/imports/%s' % zone_import_id)
+        return self._delete(f'/zones/tasks/imports/{zone_import_id}')
 
 
 class ZoneShareController(V2Controller):
     def create(self, zone, target_project_id):
         zone_id = v2_utils.resolve_by_name(self.client.zones.list, zone)
 
-        data = {"target_project_id": target_project_id}
+        data = {'target_project_id': target_project_id}
 
         return self._post(f'/zones/{zone_id}/shares', data=data)
 
diff --git a/doc/examples/recordset_create.py b/doc/examples/recordset_create.py
index bc12d4cc..62a3e519 100644
--- a/doc/examples/recordset_create.py
+++ b/doc/examples/recordset_create.py
@@ -31,7 +31,7 @@ client = client.Client(session=session)
 try:
     zone = client.zones.create('i.io.', email='i@i.io')
 except exceptions.RemoteError:
-    zone = dict([(z['name'], z) for z in client.zones.list()])['i.io.']
+    zone = {z['name']: z for z in client.zones.list()}['i.io.']
 
 print("Recordset list...")
 for rs in client.recordsets.list(zone['id']):
diff --git a/doc/examples/recordset_crud.py b/doc/examples/recordset_crud.py
index 6b09197d..16007efa 100644
--- a/doc/examples/recordset_crud.py
+++ b/doc/examples/recordset_crud.py
@@ -24,7 +24,7 @@ client = client.Client(session=session)
 
 
 try:
-    zone = dict([(z['name'], z) for z in client.zones.list()])['i.io.']
+    zone = {z['name']: z for z in client.zones.list()}['i.io.']
     client.zones.delete(zone['id'])
 except exceptions.NotFound:
     pass
@@ -40,7 +40,7 @@ for rrset in client.recordsets.list(zone['id']):
 # Make some A records
 www = client.recordsets.create(
     zone['id'],
-    'www.%s' % zone['name'],
+    'www.{}'.format(zone['name']),
     'A',
     ['10.0.0.1'])
 
@@ -52,7 +52,7 @@ client.recordsets.update(zone['id'], www['id'], values)
 
 cname = client.recordsets.create(
     zone['id'],
-    'my-site.%s' % zone['name'],
+    'my-site.{}'.format(zone['name']),
     'CNAME',
     [www['name']])
 
diff --git a/doc/examples/zone_create_primary.py b/doc/examples/zone_create_primary.py
index 65f8f44c..eb8419e3 100644
--- a/doc/examples/zone_create_primary.py
+++ b/doc/examples/zone_create_primary.py
@@ -1,4 +1,3 @@
-
 import logging
 import os
 
@@ -27,6 +26,6 @@ client = client.Client(session=session)
 try:
     zone = client.zones.create('i.io.', email='i@i.io')
 except exceptions.RemoteError:
-    zone = dict([(z['name'], z) for z in client.zones.list()])['i.io.']
+    zone = {z['name']: z for z in client.zones.list()}['i.io.']
 
 print(client.recordsets.list(zone['id']))
diff --git a/doc/examples/zone_create_secondary.py b/doc/examples/zone_create_secondary.py
index febbe906..ae6d10d7 100644
--- a/doc/examples/zone_create_secondary.py
+++ b/doc/examples/zone_create_secondary.py
@@ -24,13 +24,13 @@ client = client.Client(session=session)
 
 # Primary Zone
 primary = client.zones.create(
-    'primary-%s.io.' % str(uuid.uuid4()),
+    f'primary-{str(uuid.uuid4())}.io.',
     'PRIMARY',
     'root@x.com')
 
 # Secondary Zone
 slave = client.zones.create(
-    'secondary-%s.io.' % str(uuid.uuid4()),
+    f'secondary-{str(uuid.uuid4())}.io.',
     'SECONDARY',
     masters=["127.0.1.1"])
 
diff --git a/doc/examples/zone_list_nameservers.py b/doc/examples/zone_list_nameservers.py
index b1136e7e..fc56ff8c 100644
--- a/doc/examples/zone_list_nameservers.py
+++ b/doc/examples/zone_list_nameservers.py
@@ -23,7 +23,7 @@ session = keystone_session.Session(auth=auth)
 client = client.Client(session=session)
 
 zone = client.zones.create(
-    'primary-%s.io.' % str(uuid.uuid4()),
+    f'primary-{str(uuid.uuid4())}.io.',
     'PRIMARY',
     'root@x.com')
 
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 34bbb5f2..1fc872e0 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 #
 # designateclient documentation build configuration file
 
@@ -39,7 +38,7 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-copyright = u'2012, Managed I.T. 2013-2014, Hewlett-Packard Development Company, L.P.'
+copyright = '2012, Managed I.T. 2013-2014, Hewlett-Packard Development Company, L.P.'
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 67fb4704..d8461800 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -61,8 +61,8 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'Designate Client Release Notes'
-copyright = u'2015, Designate Developers'
+project = 'Designate Client Release Notes'
+copyright = '2015, Designate Developers'
 
 # Release notes are version independent.
 # The full version, including alpha/beta/rc tags.
@@ -212,9 +212,9 @@ latex_elements = {
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
     ('index', 'DesignateClientReleaseNotes.tex',
-     u'Designate Client Release Notes '
-     u'Documentation',
-     u'Designate Developers', 'manual'),
+     'Designate Client Release Notes '
+     'Documentation',
+     'Designate Developers', 'manual'),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -243,8 +243,8 @@ latex_documents = [
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    ('index', 'designateclientreleasenotes', u'Designate Client Release Notes '
-     u'Documentation', [u'Designate Developers'], 1)
+    ('index', 'designateclientreleasenotes', 'Designate Client Release Notes '
+     'Documentation', ['Designate Developers'], 1)
 ]
 
 # If true, show URL addresses after external links.
@@ -258,9 +258,9 @@ man_pages = [
 #  dir menu entry, description, category)
 texinfo_documents = [
     ('index', 'DesignateClientReleaseNotes',
-     u'Designate Client Release Notes '
-     u'Documentation',
-     u'Designate Developers', 'DesignateClientReleaseNotes',
+     'Designate Client Release Notes '
+     'Documentation',
+     'Designate Developers', 'DesignateClientReleaseNotes',
      'One line description of project.',
      'Miscellaneous'),
 ]