diff --git a/tempest/api/compute/servers/test_server_rescue.py b/tempest/api/compute/servers/test_server_rescue.py
index 17cd443..1247494 100644
--- a/tempest/api/compute/servers/test_server_rescue.py
+++ b/tempest/api/compute/servers/test_server_rescue.py
@@ -110,27 +110,29 @@
     create_default_network = True
 
     @classmethod
-    def skip_checks(self):
-        super(BaseServerStableDeviceRescueTest, self).skip_checks()
+    def skip_checks(cls):
+        super(BaseServerStableDeviceRescueTest, cls).skip_checks()
         if not CONF.compute_feature_enabled.rescue:
             msg = "Server rescue not available."
-            raise self.skipException(msg)
+            raise cls.skipException(msg)
         if not CONF.compute_feature_enabled.stable_rescue:
             msg = "Stable rescue not available."
-            raise self.skipException(msg)
+            raise cls.skipException(msg)
 
     def _create_server_and_rescue_image(self, hw_rescue_device=None,
                                         hw_rescue_bus=None,
                                         block_device_mapping_v2=None):
+
+        server_id = self.create_test_server(
+            wait_until='ACTIVE')['id']
+        image_id = self.create_image_from_server(
+            server_id, wait_until='ACTIVE')['id']
+
         if block_device_mapping_v2:
             server_id = self.create_test_server(
                 wait_until='ACTIVE',
                 block_device_mapping_v2=block_device_mapping_v2)['id']
-        else:
-            server_id = self.create_test_server(wait_until='ACTIVE')['id']
 
-        image_id = self.create_image_from_server(server_id,
-                                                 wait_until='ACTIVE')['id']
         if hw_rescue_bus:
             self.images_client.update_image(
                 image_id, [dict(add='/hw_rescue_bus',
@@ -193,6 +195,7 @@
 
     min_microversion = '2.87'
 
+    @decorators.attr(type='slow')
     @decorators.idempotent_id('48f123cb-922a-4065-8db6-b9a9074a556b')
     def test_stable_device_rescue_bfv_blank_volume(self):
         block_device_mapping_v2 = [{
@@ -205,6 +208,7 @@
             block_device_mapping_v2=block_device_mapping_v2)
         self._test_stable_device_rescue(server_id, rescue_image_id)
 
+    @decorators.attr(type='slow')
     @decorators.idempotent_id('e4636333-c928-40fc-98b7-70a23eef4224')
     def test_stable_device_rescue_bfv_image_volume(self):
         block_device_mapping_v2 = [{
@@ -217,19 +221,3 @@
             hw_rescue_device='disk', hw_rescue_bus='virtio',
             block_device_mapping_v2=block_device_mapping_v2)
         self._test_stable_device_rescue(server_id, rescue_image_id)
-
-    @decorators.idempotent_id('7fcc5d2c-130e-4750-95f5-7343f9d0a2f3')
-    def test_stable_device_rescue_bfv_snapshot_volume(self):
-        volume_id = self.create_volume()['id']
-        self.volumes_client.set_bootable_volume(volume_id, bootable=True)
-        snapshot_id = self.create_volume_snapshot(volume_id)['id']
-        block_device_mapping_v2 = [{
-            "boot_index": "0",
-            "source_type": "snapshot",
-            "volume_size": CONF.volume.volume_size,
-            "uuid": snapshot_id,
-            "destination_type": "volume"}]
-        server_id, rescue_image_id = self._create_server_and_rescue_image(
-            hw_rescue_device='disk', hw_rescue_bus='virtio',
-            block_device_mapping_v2=block_device_mapping_v2)
-        self._test_stable_device_rescue(server_id, rescue_image_id)
diff --git a/tempest/api/image/v1/test_image_members.py b/tempest/api/image/v1/test_image_members.py
index bf2e510..5e2c8af 100644
--- a/tempest/api/image/v1/test_image_members.py
+++ b/tempest/api/image/v1/test_image_members.py
@@ -19,9 +19,11 @@
 
 
 class ImageMembersTest(base.BaseV1ImageMembersTest):
+    """Test image members"""
 
     @decorators.idempotent_id('1d6ef640-3a20-4c84-8710-d95828fdb6ad')
     def test_add_image_member(self):
+        """Test adding member for image"""
         image = self._create_image()
         self.image_member_client.create_image_member(image, self.alt_tenant_id)
         body = self.image_member_client.list_image_members(image)
@@ -33,6 +35,7 @@
 
     @decorators.idempotent_id('6a5328a5-80e8-4b82-bd32-6c061f128da9')
     def test_get_shared_images(self):
+        """Test getting shared images"""
         image = self._create_image()
         self.image_member_client.create_image_member(image, self.alt_tenant_id)
         share_image = self._create_image()
@@ -47,6 +50,7 @@
 
     @decorators.idempotent_id('a76a3191-8948-4b44-a9d6-4053e5f2b138')
     def test_remove_member(self):
+        """Test removing member from image"""
         image_id = self._create_image()
         self.image_member_client.create_image_member(image_id,
                                                      self.alt_tenant_id)
diff --git a/tempest/api/image/v1/test_image_members_negative.py b/tempest/api/image/v1/test_image_members_negative.py
index 2748bd5..4e3c27c 100644
--- a/tempest/api/image/v1/test_image_members_negative.py
+++ b/tempest/api/image/v1/test_image_members_negative.py
@@ -19,11 +19,12 @@
 
 
 class ImageMembersNegativeTest(base.BaseV1ImageMembersTest):
+    """Negative tests of image members"""
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('147a9536-18e3-45da-91ea-b037a028f364')
     def test_add_member_with_non_existing_image(self):
-        # Add member with non existing image.
+        """Add member with non existing image"""
         non_exist_image = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound,
                           self.image_member_client.create_image_member,
@@ -32,7 +33,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('e1559f05-b667-4f1b-a7af-518b52dc0c0f')
     def test_delete_member_with_non_existing_image(self):
-        # Delete member with non existing image.
+        """Delete member with non existing image"""
         non_exist_image = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound,
                           self.image_member_client.delete_image_member,
@@ -41,7 +42,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('f5720333-dd69-4194-bb76-d2f048addd56')
     def test_delete_member_with_non_existing_tenant(self):
-        # Delete member with non existing tenant.
+        """Delete member from image with non existing tenant"""
         image_id = self._create_image()
         non_exist_tenant = data_utils.rand_uuid_hex()
         self.assertRaises(lib_exc.NotFound,
@@ -51,7 +52,10 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('f25f89e4-0b6c-453b-a853-1f80b9d7ef26')
     def test_get_image_without_membership(self):
-        # Image is hidden from another tenants.
+        """Get image without membership
+
+        Image is hidden from another tenants.
+        """
         image_id = self._create_image()
         self.assertRaises(lib_exc.NotFound,
                           self.alt_img_cli.show_image,
diff --git a/tempest/api/image/v1/test_images.py b/tempest/api/image/v1/test_images.py
index 2432c8b..595717e 100644
--- a/tempest/api/image/v1/test_images.py
+++ b/tempest/api/image/v1/test_images.py
@@ -57,7 +57,7 @@
 
     @decorators.idempotent_id('3027f8e6-3492-4a11-8575-c3293017af4d')
     def test_register_then_upload(self):
-        # Register, then upload an image
+        """Register, then upload an image"""
         properties = {'prop1': 'val1'}
         container_format, disk_format = get_container_and_disk_format()
         image = self.create_image(name='New Name',
@@ -79,7 +79,7 @@
 
     @decorators.idempotent_id('69da74d9-68a9-404b-9664-ff7164ccb0f5')
     def test_register_remote_image(self):
-        # Register a new remote image
+        """Register a new remote image"""
         container_format, disk_format = get_container_and_disk_format()
         body = self.create_image(name='New Remote Image',
                                  container_format=container_format,
@@ -96,6 +96,7 @@
 
     @decorators.idempotent_id('6d0e13a7-515b-460c-b91f-9f4793f09816')
     def test_register_http_image(self):
+        """Register a new image from an http image path url"""
         container_format, disk_format = get_container_and_disk_format()
         image = self.create_image(name='New Http Image',
                                   container_format=container_format,
@@ -108,7 +109,7 @@
 
     @decorators.idempotent_id('05b19d55-140c-40d0-b36b-fafd774d421b')
     def test_register_image_with_min_ram(self):
-        # Register an image with min ram
+        """Register an image with min ram"""
         container_format, disk_format = get_container_and_disk_format()
         properties = {'prop1': 'val1'}
         body = self.create_image(name='New_image_with_min_ram',
@@ -213,7 +214,7 @@
 
     @decorators.idempotent_id('246178ab-3b33-4212-9a4b-a7fe8261794d')
     def test_index_no_params(self):
-        # Simple test to see all fixture images returned
+        """Simple test to see all fixture images returned"""
         images_list = self.client.list_images()['images']
         image_list = [image['id'] for image in images_list]
         for image_id in self.created_images:
@@ -221,6 +222,7 @@
 
     @decorators.idempotent_id('f1755589-63d6-4468-b098-589820eb4031')
     def test_index_disk_format(self):
+        """Test listing images by disk format"""
         images_list = self.client.list_images(
             disk_format=self.disk_format_alt)['images']
         for image in images_list:
@@ -232,6 +234,7 @@
 
     @decorators.idempotent_id('2143655d-96d9-4bec-9188-8674206b4b3b')
     def test_index_container_format(self):
+        """Test listing images by container format"""
         images_list = self.client.list_images(
             container_format=self.container_format)['images']
         for image in images_list:
@@ -243,6 +246,7 @@
 
     @decorators.idempotent_id('feb32ac6-22bb-4a16-afd8-9454bb714b14')
     def test_index_max_size(self):
+        """Test listing images by max size"""
         images_list = self.client.list_images(size_max=42)['images']
         for image in images_list:
             self.assertLessEqual(image['size'], 42)
@@ -252,6 +256,7 @@
 
     @decorators.idempotent_id('6ffc16d0-4cbf-4401-95c8-4ac63eac34d8')
     def test_index_min_size(self):
+        """Test listing images by min size"""
         images_list = self.client.list_images(size_min=142)['images']
         for image in images_list:
             self.assertGreaterEqual(image['size'], 142)
@@ -261,6 +266,7 @@
 
     @decorators.idempotent_id('e5dc26d9-9aa2-48dd-bda5-748e1445da98')
     def test_index_status_active_detail(self):
+        """Test listing active images sorting by size in descending order"""
         images_list = self.client.list_images(detail=True,
                                               status='active',
                                               sort_key='size',
@@ -274,6 +280,7 @@
 
     @decorators.idempotent_id('097af10a-bae8-4342-bff4-edf89969ed2a')
     def test_index_name(self):
+        """Test listing images by its name"""
         images_list = self.client.list_images(
             detail=True,
             name='New Remote Image dup')['images']
@@ -285,6 +292,8 @@
 
 
 class UpdateImageMetaTest(base.BaseV1ImageTest):
+    """Test image metadata"""
+
     @classmethod
     def resource_setup(cls):
         super(UpdateImageMetaTest, cls).resource_setup()
@@ -308,6 +317,7 @@
 
     @decorators.idempotent_id('01752c1c-0275-4de3-9e5b-876e44541928')
     def test_list_image_metadata(self):
+        """Test listing image metadata"""
         # All metadata key/value pairs for an image should be returned
         resp = self.client.check_image(self.image_id)
         resp_metadata = common_image.get_image_meta_from_headers(resp)
@@ -316,6 +326,7 @@
 
     @decorators.idempotent_id('d6d7649c-08ce-440d-9ea7-e3dda552f33c')
     def test_update_image_metadata(self):
+        """Test updating image metadata"""
         # The metadata for the image should match the updated values
         req_metadata = {'key1': 'alt1', 'key2': 'value2'}
         resp = self.client.check_image(self.image_id)
diff --git a/tempest/api/image/v1/test_images_negative.py b/tempest/api/image/v1/test_images_negative.py
index 690b8da..2af1288 100644
--- a/tempest/api/image/v1/test_images_negative.py
+++ b/tempest/api/image/v1/test_images_negative.py
@@ -26,7 +26,10 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('036ede36-6160-4463-8c01-c781eee6369d')
     def test_register_with_invalid_container_format(self):
-        # Negative tests for invalid data supplied to POST /images
+        """Create image with invalid container format
+
+        Negative tests for invalid data supplied to POST /images
+        """
         self.assertRaises(lib_exc.BadRequest, self.client.create_image,
                           headers={'x-image-meta-name': 'test',
                                    'x-image-meta-container_format': 'wrong',
@@ -35,6 +38,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('993face5-921d-4e84-aabf-c1bba4234a67')
     def test_register_with_invalid_disk_format(self):
+        """Create image with invalid disk format"""
         self.assertRaises(lib_exc.BadRequest, self.client.create_image,
                           headers={'x-image-meta-name': 'test',
                                    'x-image-meta-container_format': 'bare',
@@ -43,7 +47,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('ec652588-7e3c-4b67-a2f2-0fa96f57c8fc')
     def test_delete_non_existent_image(self):
-        # Return an error while trying to delete a non-existent image
+        """Return an error while trying to delete a non-existent image"""
 
         non_existent_image_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound, self.client.delete_image,
@@ -52,13 +56,13 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('04f72aa3-fcec-45a3-81a3-308ef7cc82bc')
     def test_delete_image_blank_id(self):
-        # Return an error while trying to delete an image with blank Id
+        """Return an error while trying to delete an image with blank Id"""
         self.assertRaises(lib_exc.NotFound, self.client.delete_image, '')
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('950e5054-a3c7-4dee-ada5-e576f1087abd')
     def test_delete_image_non_hex_string_id(self):
-        # Return an error while trying to delete an image with non hex id
+        """Return an error while trying to delete an image with non hex id"""
         invalid_image_id = data_utils.rand_uuid()[:-1] + "j"
         self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           invalid_image_id)
@@ -66,13 +70,13 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('4ed757cd-450c-44b1-9fd1-c819748c650d')
     def test_delete_image_negative_image_id(self):
-        # Return an error while trying to delete an image with negative id
+        """Return an error while trying to delete an image with negative id"""
         self.assertRaises(lib_exc.NotFound, self.client.delete_image, -1)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('a4a448ab-3db2-4d2d-b9b2-6a1271241dfe')
     def test_delete_image_id_over_character_limit(self):
-        # Return an error while trying to delete image with id over limit
+        """Return an error while trying to delete image with id over limit"""
         overlimit_image_id = data_utils.rand_uuid() + "1"
         self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           overlimit_image_id)
diff --git a/tempest/api/image/v2/test_images_metadefs_namespace_objects.py b/tempest/api/image/v2/test_images_metadefs_namespace_objects.py
index 80f8112..32b81b1 100644
--- a/tempest/api/image/v2/test_images_metadefs_namespace_objects.py
+++ b/tempest/api/image/v2/test_images_metadefs_namespace_objects.py
@@ -30,6 +30,7 @@
 
     @decorators.idempotent_id('b1a3775e-3b5c-4f6a-a3b4-1ba3574ae718')
     def test_create_update_delete_meta_namespace_objects(self):
+        """Test creating/updating/deleting image metadata namespace objects"""
         # Create a namespace
         namespace = self.create_namespace()
         # Create a namespace object
@@ -52,6 +53,7 @@
 
     @decorators.idempotent_id('a2a3615e-3b5c-3f6a-a2b1-1ba3574ae738')
     def test_list_meta_namespace_objects(self):
+        """Test listing image metadata namespace objects"""
         # Create a namespace object
         namespace = self.create_namespace()
         meta_namespace_object = self._create_namespace_object(namespace)
@@ -64,6 +66,7 @@
 
     @decorators.idempotent_id('b1a3674e-3b4c-3f6a-a3b4-1ba3573ca768')
     def test_show_meta_namespace_objects(self):
+        """Test showing image metadata namespace object"""
         # Create a namespace object
         namespace = self.create_namespace()
         namespace_object = self._create_namespace_object(namespace)
diff --git a/tempest/api/image/v2/test_images_metadefs_namespace_properties.py b/tempest/api/image/v2/test_images_metadefs_namespace_properties.py
index ed91726..1d4f0a6 100644
--- a/tempest/api/image/v2/test_images_metadefs_namespace_properties.py
+++ b/tempest/api/image/v2/test_images_metadefs_namespace_properties.py
@@ -20,6 +20,7 @@
 
     @decorators.idempotent_id('b1a3765e-3a5d-4f6d-a3a7-3ca3476ae768')
     def test_basic_meta_def_namespace_property(self):
+        """Test operations of image metadata definition namespace property"""
         # Get the available resource types and use one resource_type
         body = self.resource_types_client.list_resource_types()
         resource_name = body['resource_types'][0]['name']
diff --git a/tempest/api/image/v2/test_images_metadefs_namespace_tags.py b/tempest/api/image/v2/test_images_metadefs_namespace_tags.py
index 482e808..dc64185 100644
--- a/tempest/api/image/v2/test_images_metadefs_namespace_tags.py
+++ b/tempest/api/image/v2/test_images_metadefs_namespace_tags.py
@@ -43,6 +43,7 @@
 
     @decorators.idempotent_id('a2a3765e-3a6d-4f6d-a3a7-3cc3476aa876')
     def test_create_list_delete_namespace_tags(self):
+        """Test creating/listing/deleting image metadata namespace tags"""
         # Create a namespace
         namespace = self.create_namespace()
         self._create_namespace_tags(namespace)
@@ -62,6 +63,7 @@
 
     @decorators.idempotent_id('a2a3765e-1a2c-3f6d-a3a7-3cc3466ab875')
     def test_create_update_delete_tag(self):
+        """Test creating/updating/deleting image metadata namespace tag"""
         # Create a namespace
         namespace = self.create_namespace()
         self._create_namespace_tags(namespace)
diff --git a/tempest/api/image/v2/test_images_metadefs_namespaces.py b/tempest/api/image/v2/test_images_metadefs_namespaces.py
index f71b16c..502949f 100644
--- a/tempest/api/image/v2/test_images_metadefs_namespaces.py
+++ b/tempest/api/image/v2/test_images_metadefs_namespaces.py
@@ -25,6 +25,7 @@
 
     @decorators.idempotent_id('319b765e-7f3d-4b3d-8b37-3ca3876ee768')
     def test_basic_metadata_definition_namespaces(self):
+        """Test operations of image metadata definition namespaces"""
         # get the available resource types and use one resource_type
         body = self.resource_types_client.list_resource_types()
         resource_name = body['resource_types'][0]['name']
diff --git a/tempest/api/image/v2/test_images_metadefs_schema.py b/tempest/api/image/v2/test_images_metadefs_schema.py
index 95cc310..7dd36d2 100644
--- a/tempest/api/image/v2/test_images_metadefs_schema.py
+++ b/tempest/api/image/v2/test_images_metadefs_schema.py
@@ -18,64 +18,64 @@
 
 
 class MetadataSchemaTest(base.BaseV2ImageTest):
-    """Test to get metadata schema"""
+    """Test to get image metadata schema"""
 
     @decorators.idempotent_id('e9e44891-3cb8-3b40-a532-e0a39fea3dab')
     def test_get_metadata_namespace_schema(self):
-        # Test to get namespace schema
+        """Test to get image namespace schema"""
         body = self.schemas_client.show_schema("metadefs/namespace")
         self.assertEqual("namespace", body['name'])
 
     @decorators.idempotent_id('ffe44891-678b-3ba0-a3e2-e0a3967b3aeb')
     def test_get_metadata_namespaces_schema(self):
-        # Test to get namespaces schema
+        """Test to get image namespaces schema"""
         body = self.schemas_client.show_schema("metadefs/namespaces")
         self.assertEqual("namespaces", body['name'])
 
     @decorators.idempotent_id('fde34891-678b-3b40-ae32-e0a3e67b6beb')
     def test_get_metadata_resource_type_schema(self):
-        # Test to get resource_type schema
+        """Test to get image resource_type schema"""
         body = self.schemas_client.show_schema("metadefs/resource_type")
         self.assertEqual("resource_type_association", body['name'])
 
     @decorators.idempotent_id('dfe4a891-b38b-3bf0-a3b2-e03ee67b3a3a')
     def test_get_metadata_resources_types_schema(self):
-        # Test to get resource_types schema
+        """Test to get image resource_types schema"""
         body = self.schemas_client.show_schema("metadefs/resource_types")
         self.assertEqual("resource_type_associations", body['name'])
 
     @decorators.idempotent_id('dff4a891-b38b-3bf0-a3b2-e03ee67b3a3b')
     def test_get_metadata_object_schema(self):
-        # Test to get object schema
+        """Test to get image object schema"""
         body = self.schemas_client.show_schema("metadefs/object")
         self.assertEqual("object", body['name'])
 
     @decorators.idempotent_id('dee4a891-b38b-3bf0-a3b2-e03ee67b3a3c')
     def test_get_metadata_objects_schema(self):
-        # Test to get objects schema
+        """Test to get image objects schema"""
         body = self.schemas_client.show_schema("metadefs/objects")
         self.assertEqual("objects", body['name'])
 
     @decorators.idempotent_id('dae4a891-b38b-3bf0-a3b2-e03ee67b3a3d')
     def test_get_metadata_property_schema(self):
-        # Test to get property schema
+        """Test to get image property schema"""
         body = self.schemas_client.show_schema("metadefs/property")
         self.assertEqual("property", body['name'])
 
     @decorators.idempotent_id('dce4a891-b38b-3bf0-a3b2-e03ee67b3a3e')
     def test_get_metadata_properties_schema(self):
-        # Test to get properties schema
+        """Test to get image properties schema"""
         body = self.schemas_client.show_schema("metadefs/properties")
         self.assertEqual("properties", body['name'])
 
     @decorators.idempotent_id('dde4a891-b38b-3bf0-a3b2-e03ee67b3a3e')
     def test_get_metadata_tag_schema(self):
-        # Test to get tag schema
+        """Test to get image tag schema"""
         body = self.schemas_client.show_schema("metadefs/tag")
         self.assertEqual("tag", body['name'])
 
     @decorators.idempotent_id('cde4a891-b38b-3bf0-a3b2-e03ee67b3a3a')
     def test_get_metadata_tags_schema(self):
-        # Test to get tags schema
+        """Test to get image tags schema"""
         body = self.schemas_client.show_schema("metadefs/tags")
         self.assertEqual("tags", body['name'])
diff --git a/tempest/api/network/admin/test_routers.py b/tempest/api/network/admin/test_routers.py
index a4a057c..41f97d8 100644
--- a/tempest/api/network/admin/test_routers.py
+++ b/tempest/api/network/admin/test_routers.py
@@ -212,6 +212,42 @@
              'enable_snat': False})
         self._verify_gateway_port(router['id'])
 
+    @decorators.idempotent_id('cbe42f84-04c2-11e7-8adb-fa163e4fa634')
+    @utils.requires_ext(extension='ext-gw-mode', service='network')
+    def test_create_router_set_gateway_with_fixed_ip(self):
+        # At first create an external network and then use that
+        # to create address and delete
+        network_name = data_utils.rand_name(self.__class__.__name__)
+        network_1 = self.admin_networks_client.create_network(
+            name=network_name, **{'router:external': True})['network']
+        self.addCleanup(test_utils.call_and_ignore_notfound_exc,
+                        self.admin_networks_client.delete_network,
+                        network_1['id'])
+        subnet = self.create_subnet(
+            network_1, client=self.admin_subnets_client, enable_dhcp=False)
+        self.addCleanup(test_utils.call_and_ignore_notfound_exc,
+                        self.admin_subnets_client.delete_subnet, subnet['id'])
+        port = self.admin_ports_client.create_port(
+            name=data_utils.rand_name(self.__class__.__name__),
+            network_id=network_1['id'])['port']
+        self.admin_ports_client.delete_port(port_id=port['id'])
+        fixed_ip = {
+            'subnet_id': port['fixed_ips'][0]['subnet_id'],
+            'ip_address': port['fixed_ips'][0]['ip_address']
+        }
+        external_gateway_info = {
+            'network_id': network_1['id'],
+            'external_fixed_ips': [fixed_ip]
+        }
+        # Create a router and set gateway to fixed_ip
+        router = self.admin_routers_client.create_router(
+            external_gateway_info=external_gateway_info)['router']
+        self.admin_routers_client.delete_router(router['id'])
+        # Examine router's gateway is equal to fixed_ip
+        self.assertEqual(router['external_gateway_info'][
+                         'external_fixed_ips'][0]['ip_address'],
+                         fixed_ip['ip_address'])
+
 
 class RoutersIpV6AdminTest(RoutersAdminTest):
     _ip_version = 6
diff --git a/tempest/api/network/test_routers.py b/tempest/api/network/test_routers.py
index ad316d1..30423e3 100644
--- a/tempest/api/network/test_routers.py
+++ b/tempest/api/network/test_routers.py
@@ -142,39 +142,6 @@
         self.routers_client.remove_router_interface(
             router['id'], port_id=port_body['port']['id'])
 
-    @decorators.idempotent_id('cbe42f84-04c2-11e7-8adb-fa163e4fa634')
-    @utils.requires_ext(extension='ext-gw-mode', service='network')
-    @testtools.skipUnless(CONF.network.public_network_id,
-                          'The public_network_id option must be specified.')
-    @decorators.skip_because(bug='1676207')
-    def test_create_router_set_gateway_with_fixed_ip(self):
-        # Don't know public_network_address, so at first create address
-        # from public_network and delete
-        port = self.admin_ports_client.create_port(
-            name=data_utils.rand_name(self.__class__.__name__),
-            network_id=CONF.network.public_network_id)['port']
-        self.admin_ports_client.delete_port(port_id=port['id'])
-
-        fixed_ip = {
-            'subnet_id': port['fixed_ips'][0]['subnet_id'],
-            'ip_address': port['fixed_ips'][0]['ip_address']
-        }
-        external_gateway_info = {
-            'network_id': CONF.network.public_network_id,
-            'external_fixed_ips': [fixed_ip]
-        }
-
-        # Create a router and set gateway to fixed_ip
-        router = self.admin_routers_client.create_router(
-            external_gateway_info=external_gateway_info)['router']
-        self.addCleanup(test_utils.call_and_ignore_notfound_exc,
-                        self.admin_routers_client.delete_router,
-                        router_id=router['id'])
-        # Examine router's gateway is equal to fixed_ip
-        self.assertEqual(router['external_gateway_info'][
-                         'external_fixed_ips'][0]['ip_address'],
-                         fixed_ip['ip_address'])
-
     @decorators.idempotent_id('c86ac3a8-50bd-4b00-a6b8-62af84a0765c')
     @utils.requires_ext(extension='extraroute', service='network')
     def test_update_delete_extra_route(self):
diff --git a/tempest/api/volume/admin/test_volume_types.py b/tempest/api/volume/admin/test_volume_types.py
index c1ceeb7..ecc850e 100644
--- a/tempest/api/volume/admin/test_volume_types.py
+++ b/tempest/api/volume/admin/test_volume_types.py
@@ -127,7 +127,6 @@
         encryption_type = \
             self.admin_encryption_types_client.create_encryption_type(
                 volume_type_id, **create_kwargs)['encryption']
-        self.assertIn('volume_type_id', encryption_type)
         for key in create_kwargs:
             self.assertEqual(create_kwargs[key], encryption_type[key],
                              'The created encryption_type %s is different '
diff --git a/tempest/lib/api_schema/response/volume/encryption_types.py b/tempest/lib/api_schema/response/volume/encryption_types.py
new file mode 100755
index 0000000..7e7ca4a
--- /dev/null
+++ b/tempest/lib/api_schema/response/volume/encryption_types.py
@@ -0,0 +1,95 @@
+# Copyright 2019 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.
+
+from tempest.lib.api_schema.response.compute.v2_1 import parameter_types
+
+show_encryption_type = {
+    'status_code': [200],
+    'response_body': {
+        'type': ['object', 'null'],
+        'properties': {
+            'volume_type_id': {'type': 'string', 'format': 'uuid'},
+            'encryption_id': {'type': 'string', 'format': 'uuid'},
+            'key_size': {'type': ['integer', 'null']},
+            'provider': {'type': 'string'},
+            'control_location': {'enum': ['front-end', 'back-end']},
+            'cipher': {'type': ['string', 'null']},
+            'deleted': {'type': 'boolean'},
+            'created_at': parameter_types.date_time,
+            'updated_at': parameter_types.date_time_or_null,
+            'deleted_at': parameter_types.date_time_or_null
+        },
+        # result of show_encryption_type may be empty list,
+        # so no required fields.
+        'additionalProperties': False,
+    }
+}
+
+show_encryption_specs_item = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'patternProperties': {
+            '^.+$': {'type': 'string'}
+        }
+    }
+}
+
+create_encryption_type = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'encryption': {
+                'type': 'object',
+                'properties': {
+                    'volume_type_id': {'type': 'string', 'format': 'uuid'},
+                    'encryption_id': {'type': 'string', 'format': 'uuid'},
+                    'key_size': {'type': ['integer', 'null']},
+                    'provider': {'type': 'string'},
+                    'control_location': {'enum': ['front-end', 'back-end']},
+                    'cipher': {'type': ['string', 'null']},
+                },
+                'additionalProperties': False,
+                'required': ['volume_type_id', 'encryption_id']
+            }
+        },
+        'additionalProperties': False,
+        'required': ['encryption']
+    }
+}
+
+delete_encryption_type = {'status_code': [202]}
+
+update_encryption_type = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'encryption': {
+                'type': 'object',
+                'properties': {
+                    'key_size': {'type': ['integer', 'null']},
+                    'provider': {'type': 'string'},
+                    'control_location': {'enum': ['front-end', 'back-end']},
+                    'cipher': {'type': ['string', 'null']},
+                },
+                # all fields are optional
+                'additionalProperties': False,
+            }
+        },
+        'additionalProperties': False,
+        'required': ['encryption']
+    }
+}
diff --git a/tempest/lib/api_schema/response/volume/scheduler_stats.py b/tempest/lib/api_schema/response/volume/scheduler_stats.py
new file mode 100644
index 0000000..b5d7d2c
--- /dev/null
+++ b/tempest/lib/api_schema/response/volume/scheduler_stats.py
@@ -0,0 +1,79 @@
+# 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.
+from tempest.lib.api_schema.response.compute.v2_1 import parameter_types
+
+get_pools_no_detail = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'pools': {
+                'type': 'array',
+                'items': {
+                    'type': 'object',
+                    'properties': {
+                        'name': {'type': 'string'},
+                    },
+                    'additionalProperties': False,
+                    'required': ['name']
+                }
+            }
+        },
+        'additionalProperties': False,
+        'required': ['pools'],
+    }
+}
+
+get_pools_with_detail = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'pools': {
+                'type': 'array',
+                'items': {
+                    'type': 'object',
+                    'properties': {
+                        'name': {'type': 'string'},
+                        'capabilities': {
+                            'type': ['object', 'null'],
+                            'properties': {
+                                'updated': parameter_types.date_time_or_null,
+                                'QoS_support': {'type': 'boolean'},
+                                'total_capacity_gb': {
+                                    'type': ['number', 'string']
+                                },
+                                'volume_backend_name': {'type': 'string'},
+                                'free_capacity_gb': {
+                                    'type': ['number', 'string']
+                                },
+                                'driver_version': {'type': 'string'},
+                                'reserved_percentage': {'type': 'integer'},
+                                'storage_protocol': {'type': 'string'},
+                                'vendor_name': {'type': 'string'},
+                                'timestamp': parameter_types.date_time_or_null
+                            },
+                            # Because some legacy volumes or backends may not
+                            # support pools, so no required fields here.
+                        },
+                    },
+                    'additionalProperties': False,
+                    'required': ['name', 'capabilities']
+                }
+            }
+        },
+        'additionalProperties': False,
+        'required': ['pools'],
+    }
+}
diff --git a/tempest/lib/api_schema/response/volume/snapshots.py b/tempest/lib/api_schema/response/volume/snapshots.py
new file mode 100644
index 0000000..e9aeb64
--- /dev/null
+++ b/tempest/lib/api_schema/response/volume/snapshots.py
@@ -0,0 +1,198 @@
+# 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.
+import copy
+
+from tempest.lib.api_schema.response.compute.v2_1 import parameter_types
+
+metadata = {
+    'type': 'object',
+    'patternProperties': {
+        '^.+$': {'type': 'string'}
+    }
+}
+
+common_snapshot_schema = {
+    'type': 'object',
+    'properties': {
+        'status': {'type': 'string'},
+        'description': {'type': ['string', 'null']},
+        'created_at': parameter_types.date_time,
+        'name': {'type': 'string'},
+        'volume_id': {'type': 'string', 'format': 'uuid'},
+        'metadata': metadata,
+        'id': {'type': 'string', 'format': 'uuid'},
+        'size': {'type': 'integer'},
+        'updated_at': parameter_types.date_time_or_null,
+        # TODO(zhufl): user_id is added in 3.41, we should move it
+        # to the 3.41 schema file when microversion is supported
+        # in volume interfaces
+        # 'user_id': {'type': 'string', 'format': 'uuid'}
+    },
+    'additionalProperties': False,
+    'required': ['status', 'description', 'created_at', 'metadata',
+                 'name', 'volume_id', 'id', 'size', 'updated_at']
+}
+
+common_snapshot_detail_schema = copy.deepcopy(common_snapshot_schema)
+common_snapshot_detail_schema['properties'].update(
+    {'os-extended-snapshot-attributes:progress': {'type': 'string'},
+     'os-extended-snapshot-attributes:project_id': {
+         'type': 'string', 'format': 'uuid'}})
+common_snapshot_detail_schema['required'].extend(
+    ['os-extended-snapshot-attributes:progress',
+     'os-extended-snapshot-attributes:project_id'])
+
+list_snapshots_no_detail = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'snapshots': {
+                'type': 'array',
+                'items': common_snapshot_schema
+            },
+            'snapshots_links': parameter_types.links,
+            # TODO(zhufl): count is added in 3.45, we should move
+            # it to the 3.45 schema file when microversion is
+            # supported in volume interfaces
+            # 'count': {'type': 'integer'}
+        },
+        'additionalProperties': False,
+        'required': ['snapshots'],
+    }
+}
+
+list_snapshots_with_detail = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'snapshots': {
+                'type': 'array',
+                'items': common_snapshot_detail_schema
+            },
+            'snapshots_links': parameter_types.links,
+            # TODO(zhufl): count is added in 3.45, we should move
+            # it to the 3.45 schema file when microversion is
+            # supported in volume interfaces
+            # 'count': {'type': 'integer'},
+        },
+        'additionalProperties': False,
+        'required': ['snapshots'],
+    }
+}
+
+show_snapshot = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'snapshot': common_snapshot_detail_schema
+        },
+        'additionalProperties': False,
+        'required': ['snapshot'],
+    }
+}
+
+create_snapshot = {
+    'status_code': [202],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'snapshot': common_snapshot_schema
+        },
+        'additionalProperties': False,
+        'required': ['snapshot'],
+    }
+}
+
+update_snapshot = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'snapshot': common_snapshot_schema
+        },
+        'additionalProperties': False,
+        'required': ['snapshot'],
+    }
+}
+
+delete_snapshot = {'status_code': [202]}
+reset_snapshot_status = {'status_code': [202]}
+update_snapshot_status = {'status_code': [202]}
+
+create_snapshot_metadata = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'metadata': metadata
+        },
+        'additionalProperties': False,
+        'required': ['metadata'],
+    }
+}
+
+show_snapshot_metadata = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'metadata': metadata
+        },
+        'additionalProperties': False,
+        'required': ['metadata'],
+    }
+}
+
+update_snapshot_metadata = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'metadata': metadata
+        },
+        'additionalProperties': False,
+        'required': ['metadata'],
+    }
+}
+
+show_snapshot_metadata_item = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'meta': metadata
+        },
+        'additionalProperties': False,
+        'required': ['meta'],
+    }
+}
+
+update_snapshot_metadata_item = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'meta': metadata
+        },
+        'additionalProperties': False,
+        'required': ['meta'],
+    }
+}
+
+delete_snapshot_metadata_item = {'status_code': [200]}
+force_delete_snapshot = {'status_code': [202]}
+unmanage_snapshot = {'status_code': [202]}
diff --git a/tempest/lib/services/compute/servers_client.py b/tempest/lib/services/compute/servers_client.py
index cbf7a8c..3ceecda 100644
--- a/tempest/lib/services/compute/servers_client.py
+++ b/tempest/lib/services/compute/servers_client.py
@@ -211,6 +211,9 @@
                                post_body)
         if body:
             body = json.loads(body)
+        else:
+            if isinstance(body, bytes):
+                body = body.decode('utf-8')
         self.validate_response(schema, resp, body)
         return rest_client.ResponseBody(resp, body)
 
diff --git a/tempest/lib/services/volume/v3/encryption_types_client.py b/tempest/lib/services/volume/v3/encryption_types_client.py
index bd809d6..7cced57 100644
--- a/tempest/lib/services/volume/v3/encryption_types_client.py
+++ b/tempest/lib/services/volume/v3/encryption_types_client.py
@@ -15,6 +15,7 @@
 
 from oslo_serialization import jsonutils as json
 
+from tempest.lib.api_schema.response.volume import encryption_types as schema
 from tempest.lib.common import rest_client
 from tempest.lib import exceptions as lib_exc
 
@@ -43,7 +44,7 @@
         url = "/types/%s/encryption" % volume_type_id
         resp, body = self.get(url)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.show_encryption_type, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def show_encryption_specs_item(self, volume_type_id, key):
@@ -51,7 +52,7 @@
         url = "/types/%s/encryption/%s" % (volume_type_id, key)
         resp, body = self.get(url)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.show_encryption_specs_item, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def create_encryption_type(self, volume_type_id, **kwargs):
@@ -65,14 +66,14 @@
         post_body = json.dumps({'encryption': kwargs})
         resp, body = self.post(url, post_body)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.create_encryption_type, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def delete_encryption_type(self, volume_type_id):
         """Delete the encryption type for the specified volume-type."""
         resp, body = self.delete(
             "/types/%s/encryption/provider" % volume_type_id)
-        self.expected_success(202, resp.status)
+        self.validate_response(schema.delete_encryption_type, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def update_encryption_type(self, volume_type_id, **kwargs):
@@ -86,5 +87,5 @@
         put_body = json.dumps({'encryption': kwargs})
         resp, body = self.put(url, put_body)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.update_encryption_type, resp, body)
         return rest_client.ResponseBody(resp, body)
diff --git a/tempest/lib/services/volume/v3/scheduler_stats_client.py b/tempest/lib/services/volume/v3/scheduler_stats_client.py
index 2ae8600..e18980d 100644
--- a/tempest/lib/services/volume/v3/scheduler_stats_client.py
+++ b/tempest/lib/services/volume/v3/scheduler_stats_client.py
@@ -15,6 +15,7 @@
 
 from oslo_serialization import jsonutils as json
 
+from tempest.lib.api_schema.response.volume import scheduler_stats as schema
 from tempest.lib.common import rest_client
 
 
@@ -28,9 +29,11 @@
         https://docs.openstack.org/api-ref/block-storage/v3/index.html#list-all-back-end-storage-pools
         """
         url = 'scheduler-stats/get_pools'
+        schema_get_pools = schema.get_pools_no_detail
         if detail:
             url += '?detail=True'
+            schema_get_pools = schema.get_pools_with_detail
         resp, body = self.get(url)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema_get_pools, resp, body)
         return rest_client.ResponseBody(resp, body)
diff --git a/tempest/lib/services/volume/v3/snapshots_client.py b/tempest/lib/services/volume/v3/snapshots_client.py
index 264381d..8ca2044 100644
--- a/tempest/lib/services/volume/v3/snapshots_client.py
+++ b/tempest/lib/services/volume/v3/snapshots_client.py
@@ -16,6 +16,7 @@
 from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
+from tempest.lib.api_schema.response.volume import snapshots as schema
 from tempest.lib.common import rest_client
 from tempest.lib import exceptions as lib_exc
 
@@ -32,14 +33,16 @@
         https://docs.openstack.org/api-ref/block-storage/v3/index.html#list-snapshots-and-details
         """
         url = 'snapshots'
+        list_schema = schema.list_snapshots_no_detail
         if detail:
             url += '/detail'
+            list_schema = schema.list_snapshots_with_detail
         if params:
             url += '?%s' % urllib.urlencode(params)
 
         resp, body = self.get(url)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(list_schema, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def show_snapshot(self, snapshot_id):
@@ -52,7 +55,7 @@
         url = "snapshots/%s" % snapshot_id
         resp, body = self.get(url)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.show_snapshot, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def create_snapshot(self, **kwargs):
@@ -65,7 +68,7 @@
         post_body = json.dumps({'snapshot': kwargs})
         resp, body = self.post('snapshots', post_body)
         body = json.loads(body)
-        self.expected_success(202, resp.status)
+        self.validate_response(schema.create_snapshot, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def update_snapshot(self, snapshot_id, **kwargs):
@@ -78,7 +81,7 @@
         put_body = json.dumps({'snapshot': kwargs})
         resp, body = self.put('snapshots/%s' % snapshot_id, put_body)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.update_snapshot, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def delete_snapshot(self, snapshot_id):
@@ -89,7 +92,7 @@
         https://docs.openstack.org/api-ref/block-storage/v3/index.html#delete-a-snapshot
         """
         resp, body = self.delete("snapshots/%s" % snapshot_id)
-        self.expected_success(202, resp.status)
+        self.validate_response(schema.delete_snapshot, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def is_resource_deleted(self, id):
@@ -108,7 +111,7 @@
         """Reset the specified snapshot's status."""
         post_body = json.dumps({'os-reset_status': {"status": status}})
         resp, body = self.post('snapshots/%s/action' % snapshot_id, post_body)
-        self.expected_success(202, resp.status)
+        self.validate_response(schema.reset_snapshot_status, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def update_snapshot_status(self, snapshot_id, **kwargs):
@@ -121,7 +124,7 @@
         post_body = json.dumps({'os-update_snapshot_status': kwargs})
         url = 'snapshots/%s/action' % snapshot_id
         resp, body = self.post(url, post_body)
-        self.expected_success(202, resp.status)
+        self.validate_response(schema.update_snapshot_status, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def create_snapshot_metadata(self, snapshot_id, metadata):
@@ -135,7 +138,7 @@
         url = "snapshots/%s/metadata" % snapshot_id
         resp, body = self.post(url, put_body)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.create_snapshot_metadata, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def show_snapshot_metadata(self, snapshot_id):
@@ -148,7 +151,7 @@
         url = "snapshots/%s/metadata" % snapshot_id
         resp, body = self.get(url)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.show_snapshot_metadata, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def update_snapshot_metadata(self, snapshot_id, **kwargs):
@@ -162,7 +165,7 @@
         url = "snapshots/%s/metadata" % snapshot_id
         resp, body = self.put(url, put_body)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.update_snapshot_metadata, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def show_snapshot_metadata_item(self, snapshot_id, id):
@@ -170,7 +173,7 @@
         url = "snapshots/%s/metadata/%s" % (snapshot_id, id)
         resp, body = self.get(url)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.show_snapshot_metadata_item, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def update_snapshot_metadata_item(self, snapshot_id, id, **kwargs):
@@ -184,21 +187,23 @@
         url = "snapshots/%s/metadata/%s" % (snapshot_id, id)
         resp, body = self.put(url, put_body)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(
+            schema.update_snapshot_metadata_item, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def delete_snapshot_metadata_item(self, snapshot_id, id):
         """Delete metadata item for the snapshot."""
         url = "snapshots/%s/metadata/%s" % (snapshot_id, id)
         resp, body = self.delete(url)
-        self.expected_success(200, resp.status)
+        self.validate_response(
+            schema.delete_snapshot_metadata_item, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def force_delete_snapshot(self, snapshot_id):
         """Force Delete Snapshot."""
         post_body = json.dumps({'os-force_delete': {}})
         resp, body = self.post('snapshots/%s/action' % snapshot_id, post_body)
-        self.expected_success(202, resp.status)
+        self.validate_response(schema.force_delete_snapshot, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def unmanage_snapshot(self, snapshot_id):
@@ -206,5 +211,5 @@
         post_body = json.dumps({'os-unmanage': {}})
         url = 'snapshots/%s/action' % (snapshot_id)
         resp, body = self.post(url, post_body)
-        self.expected_success(202, resp.status)
+        self.validate_response(schema.unmanage_snapshot, resp, body)
         return rest_client.ResponseBody(resp, body)
diff --git a/tempest/scenario/test_snapshot_pattern.py b/tempest/scenario/test_snapshot_pattern.py
index a33d4d4..a062d40 100644
--- a/tempest/scenario/test_snapshot_pattern.py
+++ b/tempest/scenario/test_snapshot_pattern.py
@@ -29,8 +29,10 @@
     The following is the scenario outline:
      * boot an instance and create a timestamp file in it
      * snapshot the instance
+     * add version metadata to the snapshot image
      * boot a second instance from the snapshot
      * check the existence of the timestamp file in the second instance
+     * snapshot the instance again
 
     """
 
@@ -63,6 +65,11 @@
         # snapshot the instance
         snapshot_image = self.create_server_snapshot(server=server)
 
+        # add version metadata to the snapshot image
+        self.image_client.update_image(
+            snapshot_image['id'], [dict(add='/version',
+                                        value='8.0')])
+
         # boot a second instance from the snapshot
         server_from_snapshot = self.create_server(
             image_id=snapshot_image['id'],
@@ -75,3 +82,6 @@
                                         private_key=keypair['private_key'],
                                         server=server_from_snapshot)
         self.assertEqual(timestamp, timestamp2)
+
+        # snapshot the instance again
+        self.create_server_snapshot(server=server_from_snapshot)
diff --git a/tempest/tests/cmd/test_cleanup_services.py b/tempest/tests/cmd/test_cleanup_services.py
index 8366290..7bf7315 100644
--- a/tempest/tests/cmd/test_cleanup_services.py
+++ b/tempest/tests/cmd/test_cleanup_services.py
@@ -274,19 +274,22 @@
                     "name": "test"
                 },
                 "name": "test-volume-snapshot",
-                "user_id": "40c2102f4a554b848d96b14f3eec39ed",
                 "volume_id": "173f7b48-c4c1-4e70-9acc-086b39073506",
                 "created_at": "2015-11-29T02:25:51.000000",
                 "size": 1,
                 "updated_at": "2015-11-20T05:36:40.000000",
-                "os-extended-snapshot-attributes:progress": "100%",
                 "id": "b1323cda-8e4b-41c1-afc5-2fc791809c8c",
                 "description": "volume snapshot"
             },
             {
                 "status": "available",
                 "name": "saved-snapshot",
+                "metadata": {},
                 "id": "1ad4c789-7e8w-4dwg-afc5",
+                "size": 1,
+                "volume_id": "af7c41be-1ff6-4233-a690-7ed61c34347f",
+                "created_at": "2015-11-20T05:39:40.000000",
+                "updated_at": "2015-11-20T05:39:40.000000",
                 "description": "snapshot in saved state"
             }
         ]
diff --git a/tempest/tests/lib/services/volume/v3/test_encryption_types_client.py b/tempest/tests/lib/services/volume/v3/test_encryption_types_client.py
index 70a3ee5..7218224 100644
--- a/tempest/tests/lib/services/volume/v3/test_encryption_types_client.py
+++ b/tempest/tests/lib/services/volume/v3/test_encryption_types_client.py
@@ -20,11 +20,11 @@
 class TestEncryptionTypesClient(base.BaseServiceTest):
     FAKE_CREATE_ENCRYPTION_TYPE = {
         "encryption": {
-            "volume_type_id": "cbc36478b0bd8e67e89",
+            "volume_type_id": "2d29462d-76cb-417c-8a9f-fb23140f1577",
             "control_location": "front-end",
             "encryption_id": "81e069c6-7394-4856-8df7-3b237ca61f74",
             "key_size": 128,
-            "provider": "LuksEncryptor",
+            "provider": "luks",
             "cipher": "aes-xts-plain64"
         }
     }
diff --git a/tempest/tests/lib/services/volume/v3/test_scheduler_stats_client.py b/tempest/tests/lib/services/volume/v3/test_scheduler_stats_client.py
index 84c7589..7606a52 100644
--- a/tempest/tests/lib/services/volume/v3/test_scheduler_stats_client.py
+++ b/tempest/tests/lib/services/volume/v3/test_scheduler_stats_client.py
@@ -25,12 +25,14 @@
                 "name": "pool1",
                 "capabilities": {
                     "updated": "2014-10-28T00:00:00-00:00",
-                    "total_capacity": 1024,
-                    "free_capacity": 100,
+                    "total_capacity_gb": 1024,
+                    "free_capacity_gb": 100,
                     "volume_backend_name": "pool1",
                     "reserved_percentage": 0,
                     "driver_version": "1.0.0",
+                    "timestamp": "2014-10-28T00:00:00-00:00",
                     "storage_protocol": "iSCSI",
+                    "vendor_name": "vendor",
                     "QoS_support": False
                 }
             },
@@ -38,12 +40,14 @@
                 "name": "pool2",
                 "capabilities": {
                     "updated": "2014-10-28T00:00:00-00:00",
-                    "total_capacity": 512,
-                    "free_capacity": 200,
+                    "total_capacity_gb": 512,
+                    "free_capacity_gb": 200,
                     "volume_backend_name": "pool2",
                     "reserved_percentage": 0,
                     "driver_version": "1.0.2",
+                    "timestamp": "2014-10-28T00:00:00-00:00",
                     "storage_protocol": "iSER",
+                    "vendor_name": "vendor",
                     "QoS_support": True
                 }
             }