diff --git a/tempest/api/compute/servers/test_delete_server.py b/tempest/api/compute/servers/test_delete_server.py
index 8842899..6155958 100644
--- a/tempest/api/compute/servers/test_delete_server.py
+++ b/tempest/api/compute/servers/test_delete_server.py
@@ -123,7 +123,7 @@
         device = '/dev/%s' % CONF.compute.volume_device_name
         server = self.create_test_server(wait_until='ACTIVE')
 
-        volume = volumes_client.create_volume(1)
+        volume = volumes_client.create_volume()
         self.addCleanup(volumes_client.delete_volume, volume['id'])
         volumes_client.wait_for_volume_status(volume['id'], 'available')
         self.client.attach_volume(server['id'],
diff --git a/tempest/api/compute/servers/test_server_rescue_negative.py b/tempest/api/compute/servers/test_server_rescue_negative.py
index 6e23334..7564758 100644
--- a/tempest/api/compute/servers/test_server_rescue_negative.py
+++ b/tempest/api/compute/servers/test_server_rescue_negative.py
@@ -58,7 +58,7 @@
 
     def _create_volume(self):
         volume = self.volumes_extensions_client.create_volume(
-            1, display_name=data_utils.rand_name(
+            CONF.volume.volume_size, display_name=data_utils.rand_name(
                 self.__class__.__name__ + '_volume'))
         self.addCleanup(self.delete_volume, volume['id'])
         self.volumes_extensions_client.wait_for_volume_status(
diff --git a/tempest/api/compute/test_live_block_migration.py b/tempest/api/compute/test_live_block_migration.py
index a933f81..d2221e1 100644
--- a/tempest/api/compute/test_live_block_migration.py
+++ b/tempest/api/compute/test_live_block_migration.py
@@ -115,7 +115,7 @@
         actual_host = self._get_host_for_server(server_id)
         target_host = self._get_host_other_than(actual_host)
 
-        volume = self.volumes_client.create_volume(1, display_name='test')
+        volume = self.volumes_client.create_volume(display_name='test')
 
         self.volumes_client.wait_for_volume_status(volume['id'],
                                                    'available')
diff --git a/tempest/api/compute/volumes/test_attach_volume.py b/tempest/api/compute/volumes/test_attach_volume.py
index 43d2302..12d5b0e 100644
--- a/tempest/api/compute/volumes/test_attach_volume.py
+++ b/tempest/api/compute/volumes/test_attach_volume.py
@@ -70,7 +70,7 @@
 
         # Create a volume and wait for it to become ready
         self.volume = self.volumes_client.create_volume(
-            1, display_name='test')
+            CONF.volume.volume_size, display_name='test')
         self.addCleanup(self._delete_volume)
         self.volumes_client.wait_for_volume_status(self.volume['id'],
                                                    'available')
diff --git a/tempest/api/compute/volumes/test_volumes_get.py b/tempest/api/compute/volumes/test_volumes_get.py
index 207476d..5f84c73 100644
--- a/tempest/api/compute/volumes/test_volumes_get.py
+++ b/tempest/api/compute/volumes/test_volumes_get.py
@@ -46,8 +46,7 @@
         v_name = data_utils.rand_name('Volume')
         metadata = {'Type': 'work'}
         # Create volume
-        volume = self.client.create_volume(size=1,
-                                           display_name=v_name,
+        volume = self.client.create_volume(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 501e9ed..bd126d8 100644
--- a/tempest/api/compute/volumes/test_volumes_list.py
+++ b/tempest/api/compute/volumes/test_volumes_list.py
@@ -53,8 +53,7 @@
             v_name = data_utils.rand_name('volume')
             metadata = {'Type': 'work'}
             try:
-                volume = cls.client.create_volume(size=1,
-                                                  display_name=v_name,
+                volume = cls.client.create_volume(display_name=v_name,
                                                   metadata=metadata)
                 cls.client.wait_for_volume_status(volume['id'], 'available')
                 volume = cls.client.get_volume(volume['id'])
diff --git a/tempest/api/volume/admin/test_multi_backend.py b/tempest/api/volume/admin/test_multi_backend.py
index 97dd104..2e4b614 100644
--- a/tempest/api/volume/admin/test_multi_backend.py
+++ b/tempest/api/volume/admin/test_multi_backend.py
@@ -70,8 +70,7 @@
 
         params = {self.name_field: vol_name, 'volume_type': type_name}
 
-        self.volume = self.admin_volume_client.create_volume(size=1,
-                                                             **params)
+        self.volume = self.admin_volume_client.create_volume(**params)
         if with_prefix:
             self.volume_id_list_with_prefix.append(self.volume['id'])
         else:
diff --git a/tempest/api/volume/admin/test_snapshots_actions.py b/tempest/api/volume/admin/test_snapshots_actions.py
index 469f13e..4834be1 100644
--- a/tempest/api/volume/admin/test_snapshots_actions.py
+++ b/tempest/api/volume/admin/test_snapshots_actions.py
@@ -34,7 +34,7 @@
         cls.name_field = cls.special_fields['name_field']
         params = {cls.name_field: vol_name}
         cls.volume = \
-            cls.volumes_client.create_volume(size=1, **params)
+            cls.volumes_client.create_volume(**params)
         cls.volumes_client.wait_for_volume_status(cls.volume['id'],
                                                   'available')
 
diff --git a/tempest/api/volume/admin/test_volume_quotas.py b/tempest/api/volume/admin/test_volume_quotas.py
index 9b436aa..a2588f7 100644
--- a/tempest/api/volume/admin/test_volume_quotas.py
+++ b/tempest/api/volume/admin/test_volume_quotas.py
@@ -86,7 +86,7 @@
         quota_usage = self.quotas_client.get_quota_usage(
             self.demo_tenant_id)
 
-        volume = self.create_volume(size=1)
+        volume = self.create_volume()
         self.addCleanup(self.admin_volume_client.delete_volume,
                         volume['id'])
 
diff --git a/tempest/api/volume/admin/test_volume_quotas_negative.py b/tempest/api/volume/admin/test_volume_quotas_negative.py
index 67edd09..98b7143 100644
--- a/tempest/api/volume/admin/test_volume_quotas_negative.py
+++ b/tempest/api/volume/admin/test_volume_quotas_negative.py
@@ -48,8 +48,7 @@
     @test.idempotent_id('bf544854-d62a-47f2-a681-90f7a47d86b6')
     def test_quota_volumes(self):
         self.assertRaises(lib_exc.OverLimit,
-                          self.volumes_client.create_volume,
-                          size=1)
+                          self.volumes_client.create_volume)
 
     @test.attr(type='negative')
     @test.idempotent_id('02bbf63f-6c05-4357-9d98-2926a94064ff')
@@ -73,8 +72,7 @@
             self.demo_tenant_id,
             **new_quota_set)
         self.assertRaises(lib_exc.OverLimit,
-                          self.volumes_client.create_volume,
-                          size=1)
+                          self.volumes_client.create_volume)
 
         new_quota_set = {'gigabytes': 2, 'volumes': 1, 'snapshots': 2}
         self.quotas_client.update_quota_set(
diff --git a/tempest/api/volume/admin/test_volume_types.py b/tempest/api/volume/admin/test_volume_types.py
index 8705f6f..01242f9 100644
--- a/tempest/api/volume/admin/test_volume_types.py
+++ b/tempest/api/volume/admin/test_volume_types.py
@@ -60,7 +60,7 @@
                   'volume_type': volume_types[0]['id']}
 
         # Create volume
-        volume = self.volumes_client.create_volume(size=1, **params)
+        volume = self.volumes_client.create_volume(**params)
         self.addCleanup(self._delete_volume, volume['id'])
         self.assertEqual(volume_types[0]['name'], volume["volume_type"])
         self.assertEqual(volume[self.name_field], vol_name,
diff --git a/tempest/api/volume/admin/test_volume_types_negative.py b/tempest/api/volume/admin/test_volume_types_negative.py
index eb46a54..d2bf777 100644
--- a/tempest/api/volume/admin/test_volume_types_negative.py
+++ b/tempest/api/volume/admin/test_volume_types_negative.py
@@ -31,8 +31,7 @@
         params = {self.name_field: str(uuid.uuid4()),
                   'volume_type': str(uuid.uuid4())}
         self.assertRaises(lib_exc.NotFound,
-                          self.volumes_client.create_volume, size=1,
-                          **params)
+                          self.volumes_client.create_volume, **params)
 
     @test.attr(type='gate')
     @test.idempotent_id('878b4e57-faa2-4659-b0d1-ce740a06ae81')
diff --git a/tempest/api/volume/admin/test_volumes_actions.py b/tempest/api/volume/admin/test_volumes_actions.py
index b0013e6..dc96839 100644
--- a/tempest/api/volume/admin/test_volumes_actions.py
+++ b/tempest/api/volume/admin/test_volumes_actions.py
@@ -34,8 +34,7 @@
         cls.name_field = cls.special_fields['name_field']
         params = {cls.name_field: vol_name}
 
-        cls.volume = cls.client.create_volume(size=1,
-                                              **params)
+        cls.volume = cls.client.create_volume(**params)
         cls.client.wait_for_volume_status(cls.volume['id'], 'available')
 
     @classmethod
@@ -61,8 +60,7 @@
         # Create a temp volume for force delete tests
         vol_name = utils.rand_name('Volume')
         params = {self.name_field: vol_name}
-        temp_volume = self.client.create_volume(size=1,
-                                                **params)
+        temp_volume = self.client.create_volume(**params)
         self.client.wait_for_volume_status(temp_volume['id'], 'available')
 
         return temp_volume
diff --git a/tempest/api/volume/base.py b/tempest/api/volume/base.py
index c672607..4f94f34 100644
--- a/tempest/api/volume/base.py
+++ b/tempest/api/volume/base.py
@@ -106,7 +106,7 @@
         super(BaseVolumeTest, cls).resource_cleanup()
 
     @classmethod
-    def create_volume(cls, size=1, **kwargs):
+    def create_volume(cls, size=None, **kwargs):
         """Wrapper utility that returns a test volume."""
         name = data_utils.rand_name('Volume')
 
diff --git a/tempest/api/volume/test_volumes_get.py b/tempest/api/volume/test_volumes_get.py
index 007b0db..d03bd8d 100644
--- a/tempest/api/volume/test_volumes_get.py
+++ b/tempest/api/volume/test_volumes_get.py
@@ -108,7 +108,7 @@
         new_v_desc = data_utils.rand_name('@#$%^* description')
         params = {self.descrip_field: new_v_desc,
                   'availability_zone': volume['availability_zone']}
-        new_volume = self.client.create_volume(size=1, **params)
+        new_volume = self.client.create_volume(**params)
         self.assertIn('id', new_volume)
         self.addCleanup(self._delete_volume, new_volume['id'])
         self.client.wait_for_volume_status(new_volume['id'], 'available')
diff --git a/tempest/api/volume/test_volumes_snapshots.py b/tempest/api/volume/test_volumes_snapshots.py
index 3c1cce3..b6cdd6b 100644
--- a/tempest/api/volume/test_volumes_snapshots.py
+++ b/tempest/api/volume/test_volumes_snapshots.py
@@ -181,7 +181,6 @@
         snapshot = self.create_snapshot(self.volume_origin['id'])
         # NOTE(gfidente): size is required also when passing snapshot_id
         volume = self.volumes_client.create_volume(
-            size=1,
             snapshot_id=snapshot['id'])
         self.volumes_client.wait_for_volume_status(volume['id'], 'available')
         self.volumes_client.delete_volume(volume['id'])
diff --git a/tempest/clients.py b/tempest/clients.py
index 5e27d44..430aeb3 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -283,7 +283,8 @@
             'build_timeout': CONF.volume.build_timeout
         })
         self.volumes_extensions_client = VolumesExtensionsClientJSON(
-            self.auth_provider, **params_volume)
+            self.auth_provider, default_volume_size=CONF.volume.volume_size,
+            **params_volume)
 
     def _set_database_clients(self):
         self.database_flavors_client = DatabaseFlavorsClientJSON(
diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index 968c8ca..f24a22a 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -207,7 +207,7 @@
         self.assertEqual(server['name'], name)
         return server
 
-    def create_volume(self, size=1, name=None, snapshot_id=None,
+    def create_volume(self, size=None, name=None, snapshot_id=None,
                       imageRef=None, volume_type=None, wait_on_delete=True):
         if name is None:
             name = data_utils.rand_name(self.__class__.__name__)
diff --git a/tempest/services/compute/json/volumes_extensions_client.py b/tempest/services/compute/json/volumes_extensions_client.py
index a9cada8..b2d5cf9 100644
--- a/tempest/services/compute/json/volumes_extensions_client.py
+++ b/tempest/services/compute/json/volumes_extensions_client.py
@@ -26,6 +26,12 @@
 
 class VolumesExtensionsClientJSON(service_client.ServiceClient):
 
+    def __init__(self, auth_provider, service, region,
+                 default_volume_size=1, **kwargs):
+        super(VolumesExtensionsClientJSON, self).__init__(
+            auth_provider, service, region, **kwargs)
+        self.default_volume_size = default_volume_size
+
     def list_volumes(self, params=None):
         """List all the volumes created."""
         url = 'os-volumes'
@@ -56,7 +62,7 @@
         self.validate_response(schema.create_get_volume, resp, body)
         return service_client.ResponseBody(resp, body['volume'])
 
-    def create_volume(self, size, **kwargs):
+    def create_volume(self, size=None, **kwargs):
         """
         Creates a new Volume.
         size(Required): Size of volume in GB.
@@ -64,6 +70,8 @@
         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
         }
diff --git a/tempest/stress/actions/volume_attach_delete.py b/tempest/stress/actions/volume_attach_delete.py
index 2e1d623..a5e393f 100644
--- a/tempest/stress/actions/volume_attach_delete.py
+++ b/tempest/stress/actions/volume_attach_delete.py
@@ -29,7 +29,6 @@
         name = data_utils.rand_name("volume")
         self.logger.info("creating volume: %s" % name)
         volume = self.manager.volumes_client.create_volume(
-            size=1,
             display_name=name)
         self.manager.volumes_client.wait_for_volume_status(volume['id'],
                                                            'available')
diff --git a/tempest/stress/actions/volume_attach_verify.py b/tempest/stress/actions/volume_attach_verify.py
index c013af3..a6abd82 100644
--- a/tempest/stress/actions/volume_attach_verify.py
+++ b/tempest/stress/actions/volume_attach_verify.py
@@ -78,7 +78,6 @@
         self.logger.info("creating volume: %s" % name)
         volumes_client = self.manager.volumes_client
         self.volume = volumes_client.create_volume(
-            size=1,
             display_name=name)
         volumes_client.wait_for_volume_status(self.volume['id'],
                                               'available')
diff --git a/tempest/stress/actions/volume_create_delete.py b/tempest/stress/actions/volume_create_delete.py
index 93402d9..4870055 100644
--- a/tempest/stress/actions/volume_create_delete.py
+++ b/tempest/stress/actions/volume_create_delete.py
@@ -20,8 +20,7 @@
         name = data_utils.rand_name("volume")
         self.logger.info("creating %s" % name)
         volumes_client = self.manager.volumes_client
-        volume = volumes_client.create_volume(size=1,
-                                              display_name=name)
+        volume = volumes_client.create_volume(display_name=name)
         vol_id = volume['id']
         volumes_client.wait_for_volume_status(vol_id, 'available')
         self.logger.info("created %s" % volume['id'])
diff --git a/tempest/thirdparty/boto/test_ec2_instance_run.py b/tempest/thirdparty/boto/test_ec2_instance_run.py
index 822bf34..88549cb 100644
--- a/tempest/thirdparty/boto/test_ec2_instance_run.py
+++ b/tempest/thirdparty/boto/test_ec2_instance_run.py
@@ -245,7 +245,8 @@
 
         self.addResourceCleanUp(self.destroy_reservation,
                                 reservation)
-        volume = self.ec2_client.create_volume(1, self.zone)
+        volume = self.ec2_client.create_volume(CONF.volume.volume_size,
+                                               self.zone)
         LOG.debug("Volume created - status: %s", volume.status)
 
         self.addResourceCleanUp(self.destroy_volume_wait, volume)
diff --git a/tempest/thirdparty/boto/test_ec2_volumes.py b/tempest/thirdparty/boto/test_ec2_volumes.py
index 4616851..06d36cc 100644
--- a/tempest/thirdparty/boto/test_ec2_volumes.py
+++ b/tempest/thirdparty/boto/test_ec2_volumes.py
@@ -43,7 +43,7 @@
     @test.idempotent_id('663f0077-c743-48ad-8ae0-46821cbc0918')
     def test_create_get_delete(self):
         # EC2 Create, get, delete Volume
-        volume = self.client.create_volume(1, self.zone)
+        volume = self.client.create_volume(CONF.volume.volume_size, self.zone)
         cuk = self.addResourceCleanUp(self.client.delete_volume, volume.id)
         self.assertIn(volume.status, self.valid_volume_status)
         retrieved = self.client.get_all_volumes((volume.id,))
@@ -56,14 +56,15 @@
     @test.idempotent_id('c6b60d7a-1af7-4f8e-af21-d539d9496149')
     def test_create_volume_from_snapshot(self):
         # EC2 Create volume from snapshot
-        volume = self.client.create_volume(1, self.zone)
+        volume = self.client.create_volume(CONF.volume.volume_size, self.zone)
         self.addResourceCleanUp(self.client.delete_volume, volume.id)
         self.assertVolumeStatusWait(volume, "available")
         snap = self.client.create_snapshot(volume.id)
         self.addResourceCleanUp(self.destroy_snapshot_wait, snap)
         self.assertSnapshotStatusWait(snap, "completed")
 
-        svol = self.client.create_volume(1, self.zone, snapshot=snap)
+        svol = self.client.create_volume(CONF.volume.volume_size, self.zone,
+                                         snapshot=snap)
         cuk = self.addResourceCleanUp(svol.delete)
         self.assertVolumeStatusWait(svol, "available")
         svol.delete()