diff --git a/tempest/api/volume/admin/test_snapshots_actions.py b/tempest/api/volume/admin/test_snapshots_actions.py
index 5af83b3..29a161b 100644
--- a/tempest/api/volume/admin/test_snapshots_actions.py
+++ b/tempest/api/volume/admin/test_snapshots_actions.py
@@ -28,11 +28,6 @@
             raise cls.skipException("Cinder snapshot feature disabled")
 
     @classmethod
-    def setup_clients(cls):
-        super(SnapshotsActionsV2Test, cls).setup_clients()
-        cls.client = cls.snapshots_client
-
-    @classmethod
     def resource_setup(cls):
         super(SnapshotsActionsV2Test, cls).resource_setup()
 
@@ -59,7 +54,7 @@
                 reset_snapshot_status(temp_snapshot['id'], status)
         self.admin_snapshots_client.\
             force_delete_snapshot(temp_snapshot['id'])
-        self.client.wait_for_resource_deletion(temp_snapshot['id'])
+        self.snapshots_client.wait_for_resource_deletion(temp_snapshot['id'])
 
     def _get_progress_alias(self):
         return 'os-extended-snapshot-attributes:progress'
@@ -85,8 +80,9 @@
         progress = '80%'
         status = 'error'
         progress_alias = self._get_progress_alias()
-        self.client.update_snapshot_status(self.snapshot['id'],
-                                           status=status, progress=progress)
+        self.snapshots_client.update_snapshot_status(self.snapshot['id'],
+                                                     status=status,
+                                                     progress=progress)
         snapshot_get = self.admin_snapshots_client.show_snapshot(
             self.snapshot['id'])['snapshot']
         self.assertEqual(status, snapshot_get['status'])
diff --git a/tempest/api/volume/admin/test_volumes_actions.py b/tempest/api/volume/admin/test_volumes_actions.py
index e7a3f62..261e652 100644
--- a/tempest/api/volume/admin/test_volumes_actions.py
+++ b/tempest/api/volume/admin/test_volumes_actions.py
@@ -23,11 +23,6 @@
 class VolumesActionsV2Test(base.BaseVolumeAdminTest):
 
     @classmethod
-    def setup_clients(cls):
-        super(VolumesActionsV2Test, cls).setup_clients()
-        cls.client = cls.volumes_client
-
-    @classmethod
     def resource_setup(cls):
         super(VolumesActionsV2Test, cls).resource_setup()
 
@@ -47,7 +42,7 @@
             self.admin_volume_client.reset_volume_status(
                 temp_volume['id'], status=status)
         self.admin_volume_client.force_delete_volume(temp_volume['id'])
-        self.client.wait_for_resource_deletion(temp_volume['id'])
+        self.volumes_client.wait_for_resource_deletion(temp_volume['id'])
 
     @test.idempotent_id('d063f96e-a2e0-4f34-8b8a-395c42de1845')
     def test_volume_reset_status(self):
diff --git a/tempest/api/volume/test_snapshot_metadata.py b/tempest/api/volume/test_snapshot_metadata.py
index 688baf5..171e241 100644
--- a/tempest/api/volume/test_snapshot_metadata.py
+++ b/tempest/api/volume/test_snapshot_metadata.py
@@ -30,11 +30,6 @@
             raise cls.skipException("Cinder snapshot feature disabled")
 
     @classmethod
-    def setup_clients(cls):
-        super(SnapshotV2MetadataTestJSON, cls).setup_clients()
-        cls.client = cls.snapshots_client
-
-    @classmethod
     def resource_setup(cls):
         super(SnapshotV2MetadataTestJSON, cls).resource_setup()
         # Create a volume
@@ -45,7 +40,8 @@
 
     def tearDown(self):
         # Update the metadata to {}
-        self.client.update_snapshot_metadata(self.snapshot_id, metadata={})
+        self.snapshots_client.update_snapshot_metadata(
+            self.snapshot_id, metadata={})
         super(SnapshotV2MetadataTestJSON, self).tearDown()
 
     @test.idempotent_id('a2f20f99-e363-4584-be97-bc33afb1a56c')
@@ -56,17 +52,17 @@
                     "key3": "value3"}
         expected = {"key2": "value2",
                     "key3": "value3"}
-        body = self.client.create_snapshot_metadata(
+        body = self.snapshots_client.create_snapshot_metadata(
             self.snapshot_id, metadata)['metadata']
         # Get the metadata of the snapshot
-        body = self.client.show_snapshot_metadata(
+        body = self.snapshots_client.show_snapshot_metadata(
             self.snapshot_id)['metadata']
         self.assertThat(body.items(), matchers.ContainsAll(metadata.items()))
 
         # Delete one item metadata of the snapshot
-        self.client.delete_snapshot_metadata_item(
+        self.snapshots_client.delete_snapshot_metadata_item(
             self.snapshot_id, "key1")
-        body = self.client.show_snapshot_metadata(
+        body = self.snapshots_client.show_snapshot_metadata(
             self.snapshot_id)['metadata']
         self.assertThat(body.items(), matchers.ContainsAll(expected.items()))
         self.assertNotIn("key1", body)
@@ -80,18 +76,18 @@
         update = {"key3": "value3_update",
                   "key4": "value4"}
         # Create metadata for the snapshot
-        body = self.client.create_snapshot_metadata(
+        body = self.snapshots_client.create_snapshot_metadata(
             self.snapshot_id, metadata)['metadata']
         # Get the metadata of the snapshot
-        body = self.client.show_snapshot_metadata(
+        body = self.snapshots_client.show_snapshot_metadata(
             self.snapshot_id)['metadata']
         self.assertThat(body.items(), matchers.ContainsAll(metadata.items()))
 
         # Update metadata item
-        body = self.client.update_snapshot_metadata(
+        body = self.snapshots_client.update_snapshot_metadata(
             self.snapshot_id, metadata=update)['metadata']
         # Get the metadata of the snapshot
-        body = self.client.show_snapshot_metadata(
+        body = self.snapshots_client.show_snapshot_metadata(
             self.snapshot_id)['metadata']
         self.assertEqual(update, body)
 
@@ -106,17 +102,17 @@
                   "key2": "value2",
                   "key3": "value3_update"}
         # Create metadata for the snapshot
-        body = self.client.create_snapshot_metadata(
+        body = self.snapshots_client.create_snapshot_metadata(
             self.snapshot_id, metadata)['metadata']
         # Get the metadata of the snapshot
-        body = self.client.show_snapshot_metadata(
+        body = self.snapshots_client.show_snapshot_metadata(
             self.snapshot_id)['metadata']
         self.assertThat(body.items(), matchers.ContainsAll(metadata.items()))
         # Update metadata item
-        body = self.client.update_snapshot_metadata_item(
+        body = self.snapshots_client.update_snapshot_metadata_item(
             self.snapshot_id, "key3", meta=update_item)['meta']
         # Get the metadata of the snapshot
-        body = self.client.show_snapshot_metadata(
+        body = self.snapshots_client.show_snapshot_metadata(
             self.snapshot_id)['metadata']
         self.assertThat(body.items(), matchers.ContainsAll(expect.items()))
 
diff --git a/tempest/api/volume/test_volumes_extend.py b/tempest/api/volume/test_volumes_extend.py
index 7aea1c4..c3d6dbb 100644
--- a/tempest/api/volume/test_volumes_extend.py
+++ b/tempest/api/volume/test_volumes_extend.py
@@ -20,20 +20,16 @@
 
 class VolumesV2ExtendTest(base.BaseVolumeTest):
 
-    @classmethod
-    def setup_clients(cls):
-        super(VolumesV2ExtendTest, cls).setup_clients()
-        cls.client = cls.volumes_client
-
     @test.idempotent_id('9a36df71-a257-43a5-9555-dc7c88e66e0e')
     def test_volume_extend(self):
         # Extend Volume Test.
         self.volume = self.create_volume()
         extend_size = int(self.volume['size']) + 1
-        self.client.extend_volume(self.volume['id'], new_size=extend_size)
-        waiters.wait_for_volume_status(self.client,
+        self.volumes_client.extend_volume(self.volume['id'],
+                                          new_size=extend_size)
+        waiters.wait_for_volume_status(self.volumes_client,
                                        self.volume['id'], 'available')
-        volume = self.client.show_volume(self.volume['id'])['volume']
+        volume = self.volumes_client.show_volume(self.volume['id'])['volume']
         self.assertEqual(int(volume['size']), extend_size)
 
 
diff --git a/tempest/api/volume/test_volumes_get.py b/tempest/api/volume/test_volumes_get.py
index 51de2be..7507ce6 100644
--- a/tempest/api/volume/test_volumes_get.py
+++ b/tempest/api/volume/test_volumes_get.py
@@ -28,11 +28,6 @@
 class VolumesV2GetTest(base.BaseVolumeTest):
 
     @classmethod
-    def setup_clients(cls):
-        super(VolumesV2GetTest, cls).setup_clients()
-        cls.client = cls.volumes_client
-
-    @classmethod
     def resource_setup(cls):
         super(VolumesV2GetTest, cls).resource_setup()
 
@@ -46,10 +41,11 @@
         # Create a volume
         kwargs[self.name_field] = v_name
         kwargs['metadata'] = metadata
-        volume = self.client.create_volume(**kwargs)['volume']
+        volume = self.volumes_client.create_volume(**kwargs)['volume']
         self.assertIn('id', volume)
-        self.addCleanup(self.delete_volume, self.client, volume['id'])
-        waiters.wait_for_volume_status(self.client, volume['id'], 'available')
+        self.addCleanup(self.delete_volume, self.volumes_client, volume['id'])
+        waiters.wait_for_volume_status(self.volumes_client, volume['id'],
+                                       'available')
         self.assertIn(self.name_field, volume)
         self.assertEqual(volume[self.name_field], v_name,
                          "The created volume name is not equal "
@@ -57,7 +53,8 @@
         self.assertIsNotNone(volume['id'],
                              "Field volume id is empty or not found.")
         # Get Volume information
-        fetched_volume = self.client.show_volume(volume['id'])['volume']
+        fetched_volume = self.volumes_client.show_volume(
+            volume['id'])['volume']
         self.assertEqual(v_name,
                          fetched_volume[self.name_field],
                          'The fetched Volume name is different '
@@ -79,20 +76,21 @@
         # Update Volume
         # Test volume update when display_name is same with original value
         params = {self.name_field: v_name}
-        self.client.update_volume(volume['id'], **params)
+        self.volumes_client.update_volume(volume['id'], **params)
         # Test volume update when display_name is new
         new_v_name = data_utils.rand_name(
             self.__class__.__name__ + '-new-Volume')
         new_desc = 'This is the new description of volume'
         params = {self.name_field: new_v_name,
                   self.descrip_field: new_desc}
-        update_volume = self.client.update_volume(
+        update_volume = self.volumes_client.update_volume(
             volume['id'], **params)['volume']
         # Assert response body for update_volume method
         self.assertEqual(new_v_name, update_volume[self.name_field])
         self.assertEqual(new_desc, update_volume[self.descrip_field])
         # Assert response body for show_volume method
-        updated_volume = self.client.show_volume(volume['id'])['volume']
+        updated_volume = self.volumes_client.show_volume(
+            volume['id'])['volume']
         self.assertEqual(volume['id'], updated_volume['id'])
         self.assertEqual(new_v_name, updated_volume[self.name_field])
         self.assertEqual(new_desc, updated_volume[self.descrip_field])
@@ -107,15 +105,16 @@
         params = {self.descrip_field: new_v_desc,
                   'availability_zone': volume['availability_zone'],
                   'size': CONF.volume.volume_size}
-        new_volume = self.client.create_volume(**params)['volume']
+        new_volume = self.volumes_client.create_volume(**params)['volume']
         self.assertIn('id', new_volume)
-        self.addCleanup(self.delete_volume, self.client, new_volume['id'])
-        waiters.wait_for_volume_status(self.client,
+        self.addCleanup(self.delete_volume, self.volumes_client,
+                        new_volume['id'])
+        waiters.wait_for_volume_status(self.volumes_client,
                                        new_volume['id'], 'available')
 
         params = {self.name_field: volume[self.name_field],
                   self.descrip_field: volume[self.descrip_field]}
-        self.client.update_volume(new_volume['id'], **params)
+        self.volumes_client.update_volume(new_volume['id'], **params)
 
         if 'imageRef' in kwargs:
             self.assertEqual('true', updated_volume['bootable'])
diff --git a/tempest/api/volume/test_volumes_list.py b/tempest/api/volume/test_volumes_list.py
index 40793ec..030ea6c 100644
--- a/tempest/api/volume/test_volumes_list.py
+++ b/tempest/api/volume/test_volumes_list.py
@@ -55,11 +55,6 @@
                              [str_vol(v) for v in fetched_list]))
 
     @classmethod
-    def setup_clients(cls):
-        super(VolumesV2ListTestJSON, cls).setup_clients()
-        cls.client = cls.volumes_client
-
-    @classmethod
     def resource_setup(cls):
         super(VolumesV2ListTestJSON, cls).resource_setup()
         cls.name = cls.VOLUME_FIELDS[1]
@@ -68,16 +63,17 @@
         cls.metadata = {'Type': 'work'}
         for i in range(3):
             volume = cls.create_volume(metadata=cls.metadata)
-            volume = cls.client.show_volume(volume['id'])['volume']
+            volume = cls.volumes_client.show_volume(volume['id'])['volume']
             cls.volume_list.append(volume)
 
     def _list_by_param_value_and_assert(self, params, with_detail=False):
         """list or list_details with given params and validates result"""
         if with_detail:
             fetched_vol_list = \
-                self.client.list_volumes(detail=True, params=params)['volumes']
+                self.volumes_client.list_volumes(detail=True,
+                                                 params=params)['volumes']
         else:
-            fetched_vol_list = self.client.list_volumes(
+            fetched_vol_list = self.volumes_client.list_volumes(
                 params=params)['volumes']
 
         # Validating params of fetched volumes
@@ -103,7 +99,7 @@
     def test_volume_list(self):
         # Get a list of Volumes
         # Fetch all volumes
-        fetched_list = self.client.list_volumes()['volumes']
+        fetched_list = self.volumes_client.list_volumes()['volumes']
         self.assertVolumesIn(fetched_list, self.volume_list,
                              fields=self.VOLUME_FIELDS)
 
@@ -111,14 +107,15 @@
     def test_volume_list_with_details(self):
         # Get a list of Volumes with details
         # Fetch all Volumes
-        fetched_list = self.client.list_volumes(detail=True)['volumes']
+        fetched_list = self.volumes_client.list_volumes(detail=True)['volumes']
         self.assertVolumesIn(fetched_list, self.volume_list)
 
     @test.idempotent_id('a28e8da4-0b56-472f-87a8-0f4d3f819c02')
     def test_volume_list_by_name(self):
         volume = self.volume_list[data_utils.rand_int_id(0, 2)]
         params = {self.name: volume[self.name]}
-        fetched_vol = self.client.list_volumes(params=params)['volumes']
+        fetched_vol = self.volumes_client.list_volumes(
+            params=params)['volumes']
         self.assertEqual(1, len(fetched_vol), str(fetched_vol))
         self.assertEqual(fetched_vol[0][self.name],
                          volume[self.name])
@@ -127,7 +124,7 @@
     def test_volume_list_details_by_name(self):
         volume = self.volume_list[data_utils.rand_int_id(0, 2)]
         params = {self.name: volume[self.name]}
-        fetched_vol = self.client.list_volumes(
+        fetched_vol = self.volumes_client.list_volumes(
             detail=True, params=params)['volumes']
         self.assertEqual(1, len(fetched_vol), str(fetched_vol))
         self.assertEqual(fetched_vol[0][self.name],
@@ -136,7 +133,8 @@
     @test.idempotent_id('39654e13-734c-4dab-95ce-7613bf8407ce')
     def test_volumes_list_by_status(self):
         params = {'status': 'available'}
-        fetched_list = self.client.list_volumes(params=params)['volumes']
+        fetched_list = self.volumes_client.list_volumes(
+            params=params)['volumes']
         self._list_by_param_value_and_assert(params)
         self.assertVolumesIn(fetched_list, self.volume_list,
                              fields=self.VOLUME_FIELDS)
@@ -144,7 +142,7 @@
     @test.idempotent_id('2943f712-71ec-482a-bf49-d5ca06216b9f')
     def test_volumes_list_details_by_status(self):
         params = {'status': 'available'}
-        fetched_list = self.client.list_volumes(
+        fetched_list = self.volumes_client.list_volumes(
             detail=True, params=params)['volumes']
         for volume in fetched_list:
             self.assertEqual('available', volume['status'])
@@ -158,7 +156,8 @@
         in volume_list are not a bootable volume.
         """
         params = {'bootable': 'false'}
-        fetched_list = self.client.list_volumes(params=params)['volumes']
+        fetched_list = self.volumes_client.list_volumes(
+            params=params)['volumes']
         self._list_by_param_value_and_assert(params)
         self.assertVolumesIn(fetched_list, self.volume_list,
                              fields=self.VOLUME_FIELDS)
@@ -166,7 +165,7 @@
     @test.idempotent_id('2016a939-72ec-482a-bf49-d5ca06216b9f')
     def test_volumes_list_details_by_bootable(self):
         params = {'bootable': 'false'}
-        fetched_list = self.client.list_volumes(
+        fetched_list = self.volumes_client.list_volumes(
             detail=True, params=params)['volumes']
         for volume in fetched_list:
             self.assertEqual('false', volume['bootable'])
@@ -177,7 +176,8 @@
         volume = self.volume_list[data_utils.rand_int_id(0, 2)]
         zone = volume['availability_zone']
         params = {'availability_zone': zone}
-        fetched_list = self.client.list_volumes(params=params)['volumes']
+        fetched_list = self.volumes_client.list_volumes(
+            params=params)['volumes']
         self._list_by_param_value_and_assert(params)
         self.assertVolumesIn(fetched_list, self.volume_list,
                              fields=self.VOLUME_FIELDS)
@@ -187,7 +187,7 @@
         volume = self.volume_list[data_utils.rand_int_id(0, 2)]
         zone = volume['availability_zone']
         params = {'availability_zone': zone}
-        fetched_list = self.client.list_volumes(
+        fetched_list = self.volumes_client.list_volumes(
             detail=True, params=params)['volumes']
         for volume in fetched_list:
             self.assertEqual(zone, volume['availability_zone'])
diff --git a/tempest/api/volume/test_volumes_negative.py b/tempest/api/volume/test_volumes_negative.py
index 6ed6b9c..c45ace6 100644
--- a/tempest/api/volume/test_volumes_negative.py
+++ b/tempest/api/volume/test_volumes_negative.py
@@ -22,11 +22,6 @@
 class VolumesV2NegativeTest(base.BaseVolumeTest):
 
     @classmethod
-    def setup_clients(cls):
-        super(VolumesV2NegativeTest, cls).setup_clients()
-        cls.client = cls.volumes_client
-
-    @classmethod
     def resource_setup(cls):
         super(VolumesV2NegativeTest, cls).resource_setup()
 
@@ -40,14 +35,14 @@
     @test.idempotent_id('f131c586-9448-44a4-a8b0-54ca838aa43e')
     def test_volume_get_nonexistent_volume_id(self):
         # Should not be able to get a non-existent volume
-        self.assertRaises(lib_exc.NotFound, self.client.show_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.show_volume,
                           data_utils.rand_uuid())
 
     @test.attr(type=['negative'])
     @test.idempotent_id('555efa6e-efcd-44ef-8a3b-4a7ca4837a29')
     def test_volume_delete_nonexistent_volume_id(self):
         # Should not be able to delete a non-existent Volume
-        self.assertRaises(lib_exc.NotFound, self.client.delete_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.delete_volume,
                           data_utils.rand_uuid())
 
     @test.attr(type=['negative'])
@@ -57,7 +52,8 @@
         # in request
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         metadata = {'Type': 'work'}
-        self.assertRaises(lib_exc.BadRequest, self.client.create_volume,
+        self.assertRaises(lib_exc.BadRequest,
+                          self.volumes_client.create_volume,
                           size='#$%', display_name=v_name, metadata=metadata)
 
     @test.attr(type=['negative'])
@@ -67,7 +63,8 @@
         # in request
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         metadata = {'Type': 'work'}
-        self.assertRaises(lib_exc.BadRequest, self.client.create_volume,
+        self.assertRaises(lib_exc.BadRequest,
+                          self.volumes_client.create_volume,
                           size='', display_name=v_name, metadata=metadata)
 
     @test.attr(type=['negative'])
@@ -76,7 +73,8 @@
         # Should not be able to create volume with size zero
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         metadata = {'Type': 'work'}
-        self.assertRaises(lib_exc.BadRequest, self.client.create_volume,
+        self.assertRaises(lib_exc.BadRequest,
+                          self.volumes_client.create_volume,
                           size='0', display_name=v_name, metadata=metadata)
 
     @test.attr(type=['negative'])
@@ -85,7 +83,8 @@
         # Should not be able to create volume with size negative
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         metadata = {'Type': 'work'}
-        self.assertRaises(lib_exc.BadRequest, self.client.create_volume,
+        self.assertRaises(lib_exc.BadRequest,
+                          self.volumes_client.create_volume,
                           size='-1', display_name=v_name, metadata=metadata)
 
     @test.attr(type=['negative'])
@@ -94,7 +93,7 @@
         # Should not be able to create volume with non-existent volume type
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         metadata = {'Type': 'work'}
-        self.assertRaises(lib_exc.NotFound, self.client.create_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.create_volume,
                           size='1', volume_type=data_utils.rand_uuid(),
                           display_name=v_name, metadata=metadata)
 
@@ -104,7 +103,7 @@
         # Should not be able to create volume with non-existent snapshot
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         metadata = {'Type': 'work'}
-        self.assertRaises(lib_exc.NotFound, self.client.create_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.create_volume,
                           size='1', snapshot_id=data_utils.rand_uuid(),
                           display_name=v_name, metadata=metadata)
 
@@ -114,7 +113,7 @@
         # Should not be able to create volume with non-existent source volume
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         metadata = {'Type': 'work'}
-        self.assertRaises(lib_exc.NotFound, self.client.create_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.create_volume,
                           size='1', source_volid=data_utils.rand_uuid(),
                           display_name=v_name, metadata=metadata)
 
@@ -123,7 +122,7 @@
     def test_update_volume_with_nonexistent_volume_id(self):
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         metadata = {'Type': 'work'}
-        self.assertRaises(lib_exc.NotFound, self.client.update_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.update_volume,
                           volume_id=data_utils.rand_uuid(),
                           display_name=v_name,
                           metadata=metadata)
@@ -133,7 +132,7 @@
     def test_update_volume_with_invalid_volume_id(self):
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         metadata = {'Type': 'work'}
-        self.assertRaises(lib_exc.NotFound, self.client.update_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.update_volume,
                           volume_id='#$%%&^&^', display_name=v_name,
                           metadata=metadata)
 
@@ -142,7 +141,7 @@
     def test_update_volume_with_empty_volume_id(self):
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         metadata = {'Type': 'work'}
-        self.assertRaises(lib_exc.NotFound, self.client.update_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.update_volume,
                           volume_id='', display_name=v_name,
                           metadata=metadata)
 
@@ -150,27 +149,29 @@
     @test.idempotent_id('30799cfd-7ee4-446c-b66c-45b383ed211b')
     def test_get_invalid_volume_id(self):
         # Should not be able to get volume with invalid id
-        self.assertRaises(lib_exc.NotFound, self.client.show_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.show_volume,
                           '#$%%&^&^')
 
     @test.attr(type=['negative'])
     @test.idempotent_id('c6c3db06-29ad-4e91-beb0-2ab195fe49e3')
     def test_get_volume_without_passing_volume_id(self):
         # Should not be able to get volume when empty ID is passed
-        self.assertRaises(lib_exc.NotFound, self.client.show_volume, '')
+        self.assertRaises(lib_exc.NotFound,
+                          self.volumes_client.show_volume, '')
 
     @test.attr(type=['negative'])
     @test.idempotent_id('1f035827-7c32-4019-9240-b4ec2dbd9dfd')
     def test_delete_invalid_volume_id(self):
         # Should not be able to delete volume when invalid ID is passed
-        self.assertRaises(lib_exc.NotFound, self.client.delete_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.delete_volume,
                           '!@#$%^&*()')
 
     @test.attr(type=['negative'])
     @test.idempotent_id('441a1550-5d44-4b30-af0f-a6d402f52026')
     def test_delete_volume_without_passing_volume_id(self):
         # Should not be able to delete volume when empty ID is passed
-        self.assertRaises(lib_exc.NotFound, self.client.delete_volume, '')
+        self.assertRaises(lib_exc.NotFound,
+                          self.volumes_client.delete_volume, '')
 
     @test.attr(type=['negative'])
     @test.idempotent_id('f5e56b0a-5d02-43c1-a2a7-c9b792c2e3f6')
@@ -179,7 +180,7 @@
         server = self.create_server(wait_until='ACTIVE')
 
         self.assertRaises(lib_exc.NotFound,
-                          self.client.attach_volume,
+                          self.volumes_client.attach_volume,
                           data_utils.rand_uuid(),
                           instance_uuid=server['id'],
                           mountpoint=self.mountpoint)
@@ -188,7 +189,7 @@
     @test.idempotent_id('9f9c24e4-011d-46b5-b992-952140ce237a')
     def test_detach_volumes_with_invalid_volume_id(self):
         self.assertRaises(lib_exc.NotFound,
-                          self.client.detach_volume,
+                          self.volumes_client.detach_volume,
                           'xxx')
 
     @test.attr(type=['negative'])
@@ -196,7 +197,8 @@
     def test_volume_extend_with_size_smaller_than_original_size(self):
         # Extend volume with smaller size than original size.
         extend_size = 0
-        self.assertRaises(lib_exc.BadRequest, self.client.extend_volume,
+        self.assertRaises(lib_exc.BadRequest,
+                          self.volumes_client.extend_volume,
                           self.volume['id'], new_size=extend_size)
 
     @test.attr(type=['negative'])
@@ -204,7 +206,8 @@
     def test_volume_extend_with_non_number_size(self):
         # Extend volume when size is non number.
         extend_size = 'abc'
-        self.assertRaises(lib_exc.BadRequest, self.client.extend_volume,
+        self.assertRaises(lib_exc.BadRequest,
+                          self.volumes_client.extend_volume,
                           self.volume['id'], new_size=extend_size)
 
     @test.attr(type=['negative'])
@@ -212,7 +215,8 @@
     def test_volume_extend_with_None_size(self):
         # Extend volume with None size.
         extend_size = None
-        self.assertRaises(lib_exc.BadRequest, self.client.extend_volume,
+        self.assertRaises(lib_exc.BadRequest,
+                          self.volumes_client.extend_volume,
                           self.volume['id'], new_size=extend_size)
 
     @test.attr(type=['negative'])
@@ -220,7 +224,7 @@
     def test_volume_extend_with_nonexistent_volume_id(self):
         # Extend volume size when volume is nonexistent.
         extend_size = int(self.volume['size']) + 1
-        self.assertRaises(lib_exc.NotFound, self.client.extend_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.extend_volume,
                           data_utils.rand_uuid(), new_size=extend_size)
 
     @test.attr(type=['negative'])
@@ -228,41 +232,42 @@
     def test_volume_extend_without_passing_volume_id(self):
         # Extend volume size when passing volume id is None.
         extend_size = int(self.volume['size']) + 1
-        self.assertRaises(lib_exc.NotFound, self.client.extend_volume,
+        self.assertRaises(lib_exc.NotFound, self.volumes_client.extend_volume,
                           None, new_size=extend_size)
 
     @test.attr(type=['negative'])
     @test.idempotent_id('ac6084c0-0546-45f9-b284-38a367e0e0e2')
     def test_reserve_volume_with_nonexistent_volume_id(self):
         self.assertRaises(lib_exc.NotFound,
-                          self.client.reserve_volume,
+                          self.volumes_client.reserve_volume,
                           data_utils.rand_uuid())
 
     @test.attr(type=['negative'])
     @test.idempotent_id('eb467654-3dc1-4a72-9b46-47c29d22654c')
     def test_unreserve_volume_with_nonexistent_volume_id(self):
         self.assertRaises(lib_exc.NotFound,
-                          self.client.unreserve_volume,
+                          self.volumes_client.unreserve_volume,
                           data_utils.rand_uuid())
 
     @test.attr(type=['negative'])
     @test.idempotent_id('449c4ed2-ecdd-47bb-98dc-072aeccf158c')
     def test_reserve_volume_with_negative_volume_status(self):
         # Mark volume as reserved.
-        self.client.reserve_volume(self.volume['id'])
+        self.volumes_client.reserve_volume(self.volume['id'])
         # Mark volume which is marked as reserved before
         self.assertRaises(lib_exc.BadRequest,
-                          self.client.reserve_volume,
+                          self.volumes_client.reserve_volume,
                           self.volume['id'])
         # Unmark volume as reserved.
-        self.client.unreserve_volume(self.volume['id'])
+        self.volumes_client.unreserve_volume(self.volume['id'])
 
     @test.attr(type=['negative'])
     @test.idempotent_id('0f4aa809-8c7b-418f-8fb3-84c7a5dfc52f')
     def test_list_volumes_with_nonexistent_name(self):
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         params = {self.name_field: v_name}
-        fetched_volume = self.client.list_volumes(params=params)['volumes']
+        fetched_volume = self.volumes_client.list_volumes(
+            params=params)['volumes']
         self.assertEqual(0, len(fetched_volume))
 
     @test.attr(type=['negative'])
@@ -271,14 +276,16 @@
         v_name = data_utils.rand_name(self.__class__.__name__ + '-Volume')
         params = {self.name_field: v_name}
         fetched_volume = \
-            self.client.list_volumes(detail=True, params=params)['volumes']
+            self.volumes_client.list_volumes(
+                detail=True, params=params)['volumes']
         self.assertEqual(0, len(fetched_volume))
 
     @test.attr(type=['negative'])
     @test.idempotent_id('143b279b-7522-466b-81be-34a87d564a7c')
     def test_list_volumes_with_invalid_status(self):
         params = {'status': 'null'}
-        fetched_volume = self.client.list_volumes(params=params)['volumes']
+        fetched_volume = self.volumes_client.list_volumes(
+            params=params)['volumes']
         self.assertEqual(0, len(fetched_volume))
 
     @test.attr(type=['negative'])
@@ -286,7 +293,8 @@
     def test_list_volumes_detail_with_invalid_status(self):
         params = {'status': 'null'}
         fetched_volume = \
-            self.client.list_volumes(detail=True, params=params)['volumes']
+            self.volumes_client.list_volumes(detail=True,
+                                             params=params)['volumes']
         self.assertEqual(0, len(fetched_volume))
 
 
diff --git a/tempest/api/volume/v2/test_volumes_list.py b/tempest/api/volume/v2/test_volumes_list.py
index 03996af..fb8c65d 100644
--- a/tempest/api/volume/v2/test_volumes_list.py
+++ b/tempest/api/volume/v2/test_volumes_list.py
@@ -33,11 +33,6 @@
     """
 
     @classmethod
-    def setup_clients(cls):
-        super(VolumesV2ListTestJSON, cls).setup_clients()
-        cls.client = cls.volumes_client
-
-    @classmethod
     def resource_setup(cls):
         super(VolumesV2ListTestJSON, cls).resource_setup()
 
@@ -45,7 +40,7 @@
         cls.metadata = {'Type': 'work'}
         # NOTE(zhufl): When using pre-provisioned credentials, the project
         # may have volumes other than those created below.
-        existing_volumes = cls.client.list_volumes()['volumes']
+        existing_volumes = cls.volumes_client.list_volumes()['volumes']
         cls.volume_id_list = [vol['id'] for vol in existing_volumes]
         for i in range(3):
             volume = cls.create_volume(metadata=cls.metadata)
@@ -63,7 +58,7 @@
                       'sort_dir': sort_dir,
                       'sort_key': sort_key
                       }
-            fetched_volume = self.client.list_volumes(
+            fetched_volume = self.volumes_client.list_volumes(
                 detail=True, params=params)['volumes']
             self.assertEqual(limit, len(fetched_volume),
                              "The count of volumes is %s, expected:%s " %
@@ -192,8 +187,8 @@
         params = {'marker': random_volume}
 
         # Running volume list using marker parameter
-        vol_with_marker = self.client.list_volumes(detail=True,
-                                                   params=params)['volumes']
+        vol_with_marker = self.volumes_client.list_volumes(
+            detail=True, params=params)['volumes']
 
         # Fetching the index of the random volume from volume_id_list
         index_marker = self.volume_id_list.index(random_volume)