diff --git a/tempest/api/volume/admin/test_volume_quota_classes.py b/tempest/api/volume/admin/test_volume_quota_classes.py
index 75dca41..ee52354 100644
--- a/tempest/api/volume/admin/test_volume_quota_classes.py
+++ b/tempest/api/volume/admin/test_volume_quota_classes.py
@@ -44,12 +44,10 @@
 
     @decorators.idempotent_id('abb9198e-67d0-4b09-859f-4f4a1418f176')
     def test_show_default_quota(self):
+        # response body is validated by schema
         default_quotas = self.admin_quota_classes_client.show_quota_class_set(
             'default')['quota_class_set']
-        self.assertIn('id', default_quotas)
         self.assertEqual('default', default_quotas.pop('id'))
-        for key in QUOTA_KEYS:
-            self.assertIn(key, default_quotas)
 
     @decorators.idempotent_id('a7644c63-2669-467a-b00e-452dd5c5397b')
     def test_update_default_quota(self):
diff --git a/tempest/lib/api_schema/response/volume/quota_classes.py b/tempest/lib/api_schema/response/volume/quota_classes.py
new file mode 100644
index 0000000..1a575d2
--- /dev/null
+++ b/tempest/lib/api_schema/response/volume/quota_classes.py
@@ -0,0 +1,68 @@
+# Copyright 2018 ZTE Corporation.  All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+show_quota_classes = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'quota_class_set': {
+                'type': 'object',
+                'properties': {
+                    'id': {'type': 'string', 'format': 'uuid'},
+                    'volumes': {'type': 'integer'},
+                    'snapshots': {'type': 'integer'},
+                    'backups': {'type': 'integer'},
+                    'groups': {'type': 'integer'},
+                    'per_volume_gigabytes': {'type': 'integer'},
+                    'gigabytes': {'type': 'integer'},
+                    'backup_gigabytes': {'type': 'integer'},
+                },
+                # for volumes_{volume_type}, etc
+                "additionalProperties": {'type': 'integer'},
+                'required': ['id', 'volumes', 'snapshots', 'backups',
+                             'per_volume_gigabytes', 'gigabytes',
+                             'backup_gigabytes'],
+            }
+        },
+        'required': ['quota_class_set']
+    }
+}
+
+update_quota_classes = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'quota_class_set': {
+                'type': 'object',
+                'properties': {
+                    'volumes': {'type': 'integer'},
+                    'snapshots': {'type': 'integer'},
+                    'backups': {'type': 'integer'},
+                    'groups': {'type': 'integer'},
+                    'per_volume_gigabytes': {'type': 'integer'},
+                    'gigabytes': {'type': 'integer'},
+                    'backup_gigabytes': {'type': 'integer'},
+                },
+                # for volumes_{volume_type}, etc
+                "additionalProperties": {'type': 'integer'},
+                'required': ['volumes', 'snapshots', 'backups',
+                             'per_volume_gigabytes', 'gigabytes',
+                             'backup_gigabytes'],
+            }
+        },
+        'required': ['quota_class_set']
+    }
+}
diff --git a/tempest/lib/services/volume/v3/quota_classes_client.py b/tempest/lib/services/volume/v3/quota_classes_client.py
index a8eb536..2ed055b 100644
--- a/tempest/lib/services/volume/v3/quota_classes_client.py
+++ b/tempest/lib/services/volume/v3/quota_classes_client.py
@@ -15,6 +15,7 @@
 
 from oslo_serialization import jsonutils as json
 
+from tempest.lib.api_schema.response.volume import quota_classes as schema
 from tempest.lib.common import rest_client
 
 
@@ -30,8 +31,8 @@
         """
         url = 'os-quota-class-sets/%s' % quota_class_id
         resp, body = self.get(url)
-        self.expected_success(200, resp.status)
         body = json.loads(body)
+        self.validate_response(schema.show_quota_classes, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def update_quota_class_set(self, quota_class_id, **kwargs):
@@ -44,6 +45,6 @@
         url = 'os-quota-class-sets/%s' % quota_class_id
         put_body = json.dumps({'quota_class_set': kwargs})
         resp, body = self.put(url, put_body)
-        self.expected_success(200, resp.status)
         body = json.loads(body)
+        self.validate_response(schema.update_quota_classes, resp, body)
         return rest_client.ResponseBody(resp, body)