diff --git a/_modules/runtest/tempest_sections/compute.py b/_modules/runtest/tempest_sections/compute.py
index d4b468e..6ae4439 100644
--- a/_modules/runtest/tempest_sections/compute.py
+++ b/_modules/runtest/tempest_sections/compute.py
@@ -185,4 +185,9 @@
 
     @property
     def volume_device_name(self):
-        pass
+        c = conditions.BaseRule('nova.compute.enabled', 'eq', True)
+        force = self.get_item_when_condition_match('nova.compute.config_drive.forced', c)
+        # NOTE(mshalamov): implicit default in nova-compute.conf template in nova salt formula
+        # for nova.compute.config_drive.forced is 'true'
+        if force is None or force is True:
+            return 'vdc'