diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index f4e2185..6776220 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -1115,12 +1115,6 @@
 
         return rules
 
-    def _ssh_to_server(self, server, private_key):
-        ssh_login = CONF.validation.image_ssh_user
-        return self.get_remote_client(server,
-                                      username=ssh_login,
-                                      private_key=private_key)
-
     def _get_router(self, client=None, tenant_id=None):
         """Retrieve a router for the given tenant id.
 
diff --git a/tempest/scenario/test_aggregates_basic_ops.py b/tempest/scenario/test_aggregates_basic_ops.py
index 97a755d..cace90b 100644
--- a/tempest/scenario/test_aggregates_basic_ops.py
+++ b/tempest/scenario/test_aggregates_basic_ops.py
@@ -43,16 +43,14 @@
     def _create_aggregate(self, **kwargs):
         aggregate = (self.aggregates_client.create_aggregate(**kwargs)
                      ['aggregate'])
-        self.addCleanup(self._delete_aggregate, aggregate)
+        self.addCleanup(self.aggregates_client.delete_aggregate,
+                        aggregate['id'])
         aggregate_name = kwargs['name']
         availability_zone = kwargs['availability_zone']
         self.assertEqual(aggregate['name'], aggregate_name)
         self.assertEqual(aggregate['availability_zone'], availability_zone)
         return aggregate
 
-    def _delete_aggregate(self, aggregate):
-        self.aggregates_client.delete_aggregate(aggregate['id'])
-
     def _get_host_name(self):
         hosts = self.hosts_client.list_hosts()['hosts']
         self.assertTrue(len(hosts) >= 1)
diff --git a/tempest/scenario/test_minimum_basic.py b/tempest/scenario/test_minimum_basic.py
index d9c6924..f7c7434 100644
--- a/tempest/scenario/test_minimum_basic.py
+++ b/tempest/scenario/test_minimum_basic.py
@@ -62,12 +62,6 @@
             server, custom_matchers.MatchesDictExceptForKeys(
                 got_server, excluded_keys=excluded_keys))
 
-    def cinder_create(self):
-        return self.create_volume()
-
-    def cinder_list(self):
-        return self.volumes_client.list_volumes()['volumes']
-
     def cinder_show(self, volume):
         got_volume = self.volumes_client.show_volume(volume['id'])['volume']
         self.assertEqual(volume, got_volume)
@@ -115,8 +109,8 @@
 
         self.nova_show(server)
 
-        volume = self.cinder_create()
-        volumes = self.cinder_list()
+        volume = self.create_volume()
+        volumes = self.volumes_client.list_volumes()['volumes']
         self.assertIn(volume['id'], [x['id'] for x in volumes])
 
         self.cinder_show(volume)
diff --git a/tempest/scenario/test_network_basic_ops.py b/tempest/scenario/test_network_basic_ops.py
index 349ef11..79a5099 100644
--- a/tempest/scenario/test_network_basic_ops.py
+++ b/tempest/scenario/test_network_basic_ops.py
@@ -240,8 +240,8 @@
         old_floating_ip, server = self.floating_ip_tuple
         ip_address = old_floating_ip.floating_ip_address
         private_key = self._get_server_key(server)
-        ssh_client = self.get_remote_client(ip_address,
-                                            private_key=private_key)
+        ssh_client = self.get_remote_client(
+            ip_address, private_key=private_key)
         old_nic_list = self._get_server_nics(ssh_client)
         # get a port from a list of one item
         port_list = self._list_ports(device_id=server['id'])
@@ -336,7 +336,8 @@
                                    should_connect=True):
         ip_address = floating_ip.floating_ip_address
         private_key = self._get_server_key(self.floating_ip_tuple.server)
-        ssh_source = self._ssh_to_server(ip_address, private_key)
+        ssh_source = self.get_remote_client(
+            ip_address, private_key=private_key)
 
         for remote_ip in address_list:
             if should_connect:
@@ -553,7 +554,8 @@
         floating_ip, server = self.floating_ip_tuple
         ip_address = floating_ip.floating_ip_address
         private_key = self._get_server_key(server)
-        ssh_client = self._ssh_to_server(ip_address, private_key)
+        ssh_client = self.get_remote_client(
+            ip_address, private_key=private_key)
 
         dns_servers = [initial_dns_server]
         servers = ssh_client.get_dns_servers()
diff --git a/tempest/scenario/test_security_groups_basic_ops.py b/tempest/scenario/test_security_groups_basic_ops.py
index 1bf4089..18bd764 100644
--- a/tempest/scenario/test_security_groups_basic_ops.py
+++ b/tempest/scenario/test_security_groups_basic_ops.py
@@ -321,8 +321,8 @@
         access_point_ssh = \
             self.floating_ips[tenant.access_point['id']].floating_ip_address
         private_key = tenant.keypair['private_key']
-        access_point_ssh = self._ssh_to_server(access_point_ssh,
-                                               private_key=private_key)
+        access_point_ssh = self.get_remote_client(
+            access_point_ssh, private_key=private_key)
         return access_point_ssh
 
     def _check_connectivity(self, access_point, ip, should_succeed=True):
diff --git a/tempest/scenario/test_server_basic_ops.py b/tempest/scenario/test_server_basic_ops.py
index 239e120..6c24d04 100644
--- a/tempest/scenario/test_server_basic_ops.py
+++ b/tempest/scenario/test_server_basic_ops.py
@@ -69,10 +69,7 @@
                       image=self.image_ref, flavor=self.flavor_ref,
                       ssh=self.run_ssh, ssh_user=self.ssh_user))
 
-    def add_keypair(self):
-        self.keypair = self.create_keypair()
-
-    def verify_ssh(self):
+    def verify_ssh(self, keypair):
         if self.run_ssh:
             # Obtain a floating IP
             self.fip = self.create_floating_ip(self.instance)['ip']
@@ -80,7 +77,7 @@
             self.ssh_client = self.get_remote_client(
                 server_or_ip=self.fip,
                 username=self.image_utils.ssh_user(self.image_ref),
-                private_key=self.keypair['private_key'])
+                private_key=keypair['private_key'])
 
     def verify_metadata(self):
         if self.run_ssh and CONF.compute_feature_enabled.metadata_service:
@@ -123,19 +120,19 @@
     @test.attr(type='smoke')
     @test.services('compute', 'network')
     def test_server_basicops(self):
-        self.add_keypair()
+        keypair = self.create_keypair()
         self.security_group = self._create_security_group()
         security_groups = [{'name': self.security_group['name']}]
         self.md = {'meta1': 'data1', 'meta2': 'data2', 'metaN': 'dataN'}
         self.instance = self.create_server(
             image_id=self.image_ref,
             flavor=self.flavor_ref,
-            key_name=self.keypair['name'],
+            key_name=keypair['name'],
             security_groups=security_groups,
             config_drive=CONF.compute_feature_enabled.config_drive,
             metadata=self.md,
             wait_until='ACTIVE')
-        self.verify_ssh()
+        self.verify_ssh(keypair)
         self.verify_metadata()
         self.verify_metadata_on_config_drive()
         self.servers_client.delete_server(self.instance['id'])
diff --git a/tempest/scenario/test_stamp_pattern.py b/tempest/scenario/test_stamp_pattern.py
index 8183ce3..f88fb14 100644
--- a/tempest/scenario/test_stamp_pattern.py
+++ b/tempest/scenario/test_stamp_pattern.py
@@ -60,10 +60,6 @@
         if not CONF.volume_feature_enabled.snapshot:
             raise cls.skipException("Cinder volume snapshots are disabled")
 
-    def _wait_for_volume_snapshot_status(self, volume_snapshot, status):
-        self.snapshots_client.wait_for_snapshot_status(volume_snapshot['id'],
-                                                       status)
-
     def _create_volume_snapshot(self, volume):
         snapshot_name = data_utils.rand_name('scenario-snapshot')
         snapshot = self.snapshots_client.create_snapshot(
@@ -78,29 +74,12 @@
             except lib_exc.NotFound:
                 pass
         self.addCleanup(cleaner)
-        self._wait_for_volume_status(volume, 'available')
+        self.volumes_client.wait_for_volume_status(volume['id'], 'available')
         self.snapshots_client.wait_for_snapshot_status(snapshot['id'],
                                                        'available')
         self.assertEqual(snapshot_name, snapshot['display_name'])
         return snapshot
 
-    def _wait_for_volume_status(self, volume, status):
-        self.volumes_client.wait_for_volume_status(volume['id'], status)
-
-    def _create_volume(self, snapshot_id=None):
-        return self.create_volume(snapshot_id=snapshot_id)
-
-    def _attach_volume(self, server, volume):
-        attached_volume = self.servers_client.attach_volume(
-            server['id'], volumeId=volume['id'], device='/dev/%s'
-            % CONF.compute.volume_device_name)['volumeAttachment']
-        self.assertEqual(volume['id'], attached_volume['id'])
-        self._wait_for_volume_status(attached_volume, 'in-use')
-
-    def _detach_volume(self, server, volume):
-        self.servers_client.detach_volume(server['id'], volume['id'])
-        self._wait_for_volume_status(volume, 'available')
-
     def _wait_for_volume_available_on_the_system(self, server_or_ip,
                                                  private_key):
         ssh = self.get_remote_client(server_or_ip, private_key=private_key)
@@ -126,7 +105,7 @@
         security_group = self._create_security_group()
 
         # boot an instance and create a timestamp file in it
-        volume = self._create_volume()
+        volume = self.create_volume()
         server = self.create_server(
             image_id=CONF.compute.image_ref,
             key_name=keypair['name'],
@@ -136,13 +115,13 @@
         # create and add floating IP to server1
         ip_for_server = self.get_server_or_ip(server)
 
-        self._attach_volume(server, volume)
+        self.nova_volume_attach(server, volume)
         self._wait_for_volume_available_on_the_system(ip_for_server,
                                                       keypair['private_key'])
         timestamp = self.create_timestamp(ip_for_server,
                                           CONF.compute.volume_device_name,
                                           private_key=keypair['private_key'])
-        self._detach_volume(server, volume)
+        self.nova_volume_detach(server, volume)
 
         # snapshot the volume
         volume_snapshot = self._create_volume_snapshot(volume)
@@ -151,7 +130,7 @@
         snapshot_image = self.create_server_snapshot(server=server)
 
         # create second volume from the snapshot(volume2)
-        volume_from_snapshot = self._create_volume(
+        volume_from_snapshot = self.create_volume(
             snapshot_id=volume_snapshot['id'])
 
         # boot second instance from the snapshot(instance2)
@@ -164,7 +143,7 @@
         ip_for_snapshot = self.get_server_or_ip(server_from_snapshot)
 
         # attach volume2 to instance2
-        self._attach_volume(server_from_snapshot, volume_from_snapshot)
+        self.nova_volume_attach(server_from_snapshot, volume_from_snapshot)
         self._wait_for_volume_available_on_the_system(ip_for_snapshot,
                                                       keypair['private_key'])