diff --git a/tempest/api/compute/floating_ips/test_floating_ips_actions.py b/tempest/api/compute/floating_ips/test_floating_ips_actions.py
index 19f5fba..e6f4fb0 100644
--- a/tempest/api/compute/floating_ips/test_floating_ips_actions.py
+++ b/tempest/api/compute/floating_ips/test_floating_ips_actions.py
@@ -13,6 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute.floating_ips import base
 from tempest.common.utils import data_utils
 from tempest import exceptions
@@ -135,7 +137,7 @@
 
         # Make sure no longer associated with old server
         self.assertRaises((exceptions.NotFound,
-                           exceptions.UnprocessableEntity,
+                           lib_exc.UnprocessableEntity,
                            exceptions.Conflict),
                           self.client.disassociate_floating_ip_from_server,
                           self.floating_ip, self.server_id)
diff --git a/tempest/common/service_client.py b/tempest/common/service_client.py
index dc634a1..513098e 100644
--- a/tempest/common/service_client.py
+++ b/tempest/common/service_client.py
@@ -71,8 +71,6 @@
             raise exceptions.OverLimit(ex)
         except lib_exceptions.InvalidContentType as ex:
             raise exceptions.InvalidContentType(ex)
-        except lib_exceptions.UnprocessableEntity as ex:
-            raise exceptions.UnprocessableEntity(ex)
         # TODO(oomichi): This is just a workaround for failing gate tests
         # when separating Forbidden from Unauthorized in tempest-lib.
         # We will need to remove this translation and replace negative tests
diff --git a/tempest/exceptions.py b/tempest/exceptions.py
index 680b92a..3b5fedb 100644
--- a/tempest/exceptions.py
+++ b/tempest/exceptions.py
@@ -163,10 +163,6 @@
     message = "Bad request"
 
 
-class UnprocessableEntity(RestClientException):
-    message = "Unprocessable entity"
-
-
 class OverLimit(RestClientException):
     message = "Quota exceeded"
 
diff --git a/tempest/services/volume/json/admin/volume_types_client.py b/tempest/services/volume/json/admin/volume_types_client.py
index b3b4ae6..fe85ac4 100644
--- a/tempest/services/volume/json/admin/volume_types_client.py
+++ b/tempest/services/volume/json/admin/volume_types_client.py
@@ -16,6 +16,8 @@
 import json
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.common import service_client
 from tempest import exceptions
 from tempest.services.volume.json import base
@@ -40,7 +42,7 @@
                     return True
             else:
                 msg = (" resource value is either not defined or incorrect.")
-                raise exceptions.UnprocessableEntity(msg)
+                raise lib_exc.UnprocessableEntity(msg)
         except exceptions.NotFound:
             return True
         return False
diff --git a/tempest/services/volume/json/qos_client.py b/tempest/services/volume/json/qos_client.py
index 32555eb..a2449d2 100644
--- a/tempest/services/volume/json/qos_client.py
+++ b/tempest/services/volume/json/qos_client.py
@@ -15,6 +15,8 @@
 import json
 import time
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.common import service_client
 from tempest import exceptions
 from tempest.services.volume.json import base
@@ -60,7 +62,7 @@
                     return
             else:
                 msg = (" operation value is either not defined or incorrect.")
-                raise exceptions.UnprocessableEntity(msg)
+                raise lib_exc.UnprocessableEntity(msg)
 
             if int(time.time()) - start_time >= self.build_timeout:
                 raise exceptions.TimeoutException