diff --git a/tempest/clients.py b/tempest/clients.py
index ba8068e..786e05f 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -332,9 +332,12 @@
                                                     **params)
         self.snapshots_v2_client = SnapshotsV2ClientJSON(self.auth_provider,
                                                          **params)
-        self.volumes_client = VolumesClientJSON(self.auth_provider, **params)
-        self.volumes_v2_client = VolumesV2ClientJSON(self.auth_provider,
-                                                     **params)
+        self.volumes_client = VolumesClientJSON(
+            self.auth_provider, default_volume_size=CONF.volume.volume_size,
+            **params)
+        self.volumes_v2_client = VolumesV2ClientJSON(
+            self.auth_provider, default_volume_size=CONF.volume.volume_size,
+            **params)
         self.volume_types_client = VolumeTypesClientJSON(self.auth_provider,
                                                          **params)
         self.volume_services_client = VolumesServicesClientJSON(
diff --git a/tempest/services/volume/json/volumes_client.py b/tempest/services/volume/json/volumes_client.py
index b906cec..9ef1686 100644
--- a/tempest/services/volume/json/volumes_client.py
+++ b/tempest/services/volume/json/volumes_client.py
@@ -20,11 +20,8 @@
 from tempest_lib import exceptions as lib_exc
 
 from tempest.common import service_client
-from tempest import config
 from tempest import exceptions
 
-CONF = config.CONF
-
 
 class BaseVolumesClientJSON(service_client.ServiceClient):
     """
@@ -33,6 +30,12 @@
 
     create_resp = 200
 
+    def __init__(self, auth_provider, service, region,
+                 default_volume_size=1, **kwargs):
+        super(BaseVolumesClientJSON, self).__init__(
+            auth_provider, service, region, **kwargs)
+        self.default_volume_size = default_volume_size
+
     def get_attachment_from_volume(self, volume):
         """Return the element 'attachment' from input volumes."""
         return volume['attachments'][0]
@@ -79,10 +82,8 @@
         snapshot_id: When specified the volume is created from this snapshot
         imageRef: When specified the volume is created from this image
         """
-        # for bug #1293885:
-        # If no size specified, read volume size from CONF
         if size is None:
-            size = CONF.volume.volume_size
+            size = self.default_volume_size
         post_body = {'size': size}
         post_body.update(kwargs)
         post_body = json.dumps({'volume': post_body})