diff --git a/tempest/api/compute/servers/test_delete_server.py b/tempest/api/compute/servers/test_delete_server.py
index 551f8b4..21942f8 100644
--- a/tempest/api/compute/servers/test_delete_server.py
+++ b/tempest/api/compute/servers/test_delete_server.py
@@ -117,7 +117,7 @@
         device = '/dev/%s' % CONF.compute.volume_device_name
         server = self.create_test_server(wait_until='ACTIVE')
 
-        volume = volumes_client.create_volume()
+        volume = volumes_client.create_volume(size=CONF.volume.volume_size)
         self.addCleanup(volumes_client.delete_volume, volume['id'])
         waiters.wait_for_volume_status(volumes_client,
                                        volume['id'], 'available')
diff --git a/tempest/api/compute/servers/test_server_rescue_negative.py b/tempest/api/compute/servers/test_server_rescue_negative.py
index 7a25526..4a49c18 100644
--- a/tempest/api/compute/servers/test_server_rescue_negative.py
+++ b/tempest/api/compute/servers/test_server_rescue_negative.py
@@ -61,7 +61,7 @@
 
     def _create_volume(self):
         volume = self.volumes_extensions_client.create_volume(
-            CONF.volume.volume_size, display_name=data_utils.rand_name(
+            size=CONF.volume.volume_size, display_name=data_utils.rand_name(
                 self.__class__.__name__ + '_volume'))
         self.addCleanup(self.delete_volume, volume['id'])
         waiters.wait_for_volume_status(self.volumes_extensions_client,
diff --git a/tempest/api/compute/volumes/test_volumes_get.py b/tempest/api/compute/volumes/test_volumes_get.py
index 44339a3..f05a5a3 100644
--- a/tempest/api/compute/volumes/test_volumes_get.py
+++ b/tempest/api/compute/volumes/test_volumes_get.py
@@ -46,7 +46,8 @@
         v_name = data_utils.rand_name('Volume')
         metadata = {'Type': 'work'}
         # Create volume
-        volume = self.client.create_volume(display_name=v_name,
+        volume = self.client.create_volume(size=CONF.volume.volume_size,
+                                           display_name=v_name,
                                            metadata=metadata)
         self.addCleanup(self.delete_volume, volume['id'])
         self.assertIn('id', volume)
diff --git a/tempest/api/compute/volumes/test_volumes_list.py b/tempest/api/compute/volumes/test_volumes_list.py
index 22b3d13..421d96f 100644
--- a/tempest/api/compute/volumes/test_volumes_list.py
+++ b/tempest/api/compute/volumes/test_volumes_list.py
@@ -54,7 +54,8 @@
             v_name = data_utils.rand_name('volume')
             metadata = {'Type': 'work'}
             try:
-                volume = cls.client.create_volume(display_name=v_name,
+                volume = cls.client.create_volume(size=CONF.volume.volume_size,
+                                                  display_name=v_name,
                                                   metadata=metadata)
                 waiters.wait_for_volume_status(cls.client,
                                                volume['id'], 'available')
diff --git a/tempest/clients.py b/tempest/clients.py
index 7cb4347..b9f7991 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -321,8 +321,7 @@
             'build_timeout': CONF.volume.build_timeout
         })
         self.volumes_extensions_client = VolumesExtensionsClient(
-            self.auth_provider, default_volume_size=CONF.volume.volume_size,
-            **params_volume)
+            self.auth_provider, **params_volume)
 
     def _set_database_clients(self):
         self.database_flavors_client = DatabaseFlavorsClient(
diff --git a/tempest/services/compute/json/volumes_extensions_client.py b/tempest/services/compute/json/volumes_extensions_client.py
index ac55049..c86aaff 100644
--- a/tempest/services/compute/json/volumes_extensions_client.py
+++ b/tempest/services/compute/json/volumes_extensions_client.py
@@ -23,12 +23,6 @@
 
 class VolumesExtensionsClient(service_client.ServiceClient):
 
-    def __init__(self, auth_provider, service, region,
-                 default_volume_size=1, **kwargs):
-        super(VolumesExtensionsClient, self).__init__(
-            auth_provider, service, region, **kwargs)
-        self.default_volume_size = default_volume_size
-
     def list_volumes(self, detail=False, **params):
         """List all the volumes created."""
         url = 'os-volumes'
@@ -51,7 +45,7 @@
         self.validate_response(schema.create_get_volume, resp, body)
         return service_client.ResponseBody(resp, body['volume'])
 
-    def create_volume(self, size=None, **kwargs):
+    def create_volume(self, **kwargs):
         """
         Creates a new Volume.
         size(Required): Size of volume in GB.
@@ -59,14 +53,7 @@
         display_name: Optional Volume Name.
         metadata: A dictionary of values to be used as metadata.
         """
-        if size is None:
-            size = self.default_volume_size
-        post_body = {
-            'size': size
-        }
-        post_body.update(kwargs)
-
-        post_body = json.dumps({'volume': post_body})
+        post_body = json.dumps({'volume': kwargs})
         resp, body = self.post('os-volumes', post_body)
         body = json.loads(body)
         self.validate_response(schema.create_get_volume, resp, body)