diff --git a/.zuul.yaml b/.zuul.yaml
index 85091d8..5d0c956 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -128,6 +128,8 @@
               volume_revert: True
       devstack_services:
         barbican: true
+        # explicitly enable c-bak, as it may be disabled in the parent job
+        c-bak: true
       tempest_plugins:
         - cinder-tempest-plugin
     irrelevant-files:
diff --git a/cinder_tempest_plugin/api/volume/base.py b/cinder_tempest_plugin/api/volume/base.py
index 1c64973..e049ff3 100644
--- a/cinder_tempest_plugin/api/volume/base.py
+++ b/cinder_tempest_plugin/api/volume/base.py
@@ -91,6 +91,10 @@
             name = data_utils.rand_name(cls.__name__ + '-Volume')
             kwargs['name'] = name
 
+        if CONF.compute.compute_volume_common_az:
+            kwargs.setdefault('availability_zone',
+                              CONF.compute.compute_volume_common_az)
+
         volume = cls.volumes_client.create_volume(**kwargs)['volume']
         cls.addClassResourceCleanup(
             cls.volumes_client.wait_for_resource_deletion, volume['id'])