diff --git a/tempest/api/compute/volumes/test_attach_volume.py b/tempest/api/compute/volumes/test_attach_volume.py
index f83e62c..92524fc 100644
--- a/tempest/api/compute/volumes/test_attach_volume.py
+++ b/tempest/api/compute/volumes/test_attach_volume.py
@@ -41,11 +41,6 @@
         cls.prepare_instance_network()
         super(BaseAttachVolumeTest, cls).setup_credentials()
 
-    @classmethod
-    def resource_setup(cls):
-        super(BaseAttachVolumeTest, cls).resource_setup()
-        cls.device = CONF.compute.volume_device_name
-
     def _create_server(self):
         # Start a server and wait for it to become ready
         validation_resources = self.get_test_validation_resources(
@@ -84,15 +79,18 @@
             # NOTE(andreaf) We need to ensure the ssh key has been
             # injected in the guest before we power cycle
             linux_client.validate_authentication()
+            disks_before_attach = linux_client.count_disks()
 
         volume = self.create_volume()
 
         # NOTE: As of the 12.0.0 Liberty release, the Nova libvirt driver
-        # no longer honors a user-supplied device name, in that case
-        # CONF.compute.volume_device_name must be set the equal value as
-        # the libvirt auto-assigned one
-        attachment = self.attach_volume(server, volume,
-                                        device=('/dev/%s' % self.device))
+        # no longer honors a user-supplied device name, and there can be
+        # a mismatch between libvirt provide disk name and actual disk name
+        # on instance, hence we no longer validate this test with the supplied
+        # device name rather we count number of disk before attach
+        # detach to validate the testcase.
+
+        attachment = self.attach_volume(server, volume)
 
         self.servers_client.stop_server(server['id'])
         waiters.wait_for_server_status(self.servers_client, server['id'],
@@ -103,9 +101,8 @@
                                        'ACTIVE')
 
         if CONF.validation.run_validation:
-            disks = linux_client.get_disks()
-            device_name_to_match = '\n' + self.device + ' '
-            self.assertIn(device_name_to_match, disks)
+            disks_after_attach = linux_client.count_disks()
+            self.assertGreater(disks_after_attach, disks_before_attach)
 
         self.servers_client.detach_volume(server['id'], attachment['volumeId'])
         waiters.wait_for_volume_resource_status(
@@ -120,8 +117,8 @@
                                        'ACTIVE')
 
         if CONF.validation.run_validation:
-            disks = linux_client.get_disks()
-            self.assertNotIn(device_name_to_match, disks)
+            disks_after_detach = linux_client.count_disks()
+            self.assertEqual(disks_before_attach, disks_after_detach)
 
     @decorators.idempotent_id('7fa563fe-f0f7-43eb-9e22-a1ece036b513')
     def test_list_get_volume_attachments(self):
diff --git a/tempest/common/utils/linux/remote_client.py b/tempest/common/utils/linux/remote_client.py
index dad710c..5875da3 100644
--- a/tempest/common/utils/linux/remote_client.py
+++ b/tempest/common/utils/linux/remote_client.py
@@ -73,6 +73,13 @@
             msg = "'TYPE' column is required but the output doesn't have it: "
             raise tempest.lib.exceptions.TempestException(msg + output)
 
+    def count_disks(self):
+        disks_list = self.get_disks()
+        disks_list = [line[0] for line in
+                      [device_name.split()
+                       for device_name in disks_list.splitlines()][1:]]
+        return len(disks_list)
+
     def get_boot_time(self):
         cmd = 'cut -f1 -d. /proc/uptime'
         boot_secs = self.exec_command(cmd)
diff --git a/tempest/tests/common/utils/linux/test_remote_client.py b/tempest/tests/common/utils/linux/test_remote_client.py
index 644a018..caad41c 100644
--- a/tempest/tests/common/utils/linux/test_remote_client.py
+++ b/tempest/tests/common/utils/linux/test_remote_client.py
@@ -106,6 +106,15 @@
         self.assertEqual(self.conn.get_disks(), result)
         self._assert_exec_called_with('lsblk -lb --nodeps')
 
+    def test_count_disk(self):
+        output_lsblk = """\
+NAME       MAJ:MIN    RM          SIZE RO TYPE MOUNTPOINT
+sda          8:0       0  128035676160  0 disk
+sdb          8:16      0 1000204886016  0 disk
+sr0         11:0       1    1073741312  0 rom"""
+        self.ssh_mock.mock.exec_command.return_value = output_lsblk
+        self.assertEqual(self.conn.count_disks(), 2)
+
     def test_get_boot_time(self):
         booted_at = 10000
         uptime_sec = 5000.02