diff --git a/config_tempest/flavors.py b/config_tempest/flavors.py
index 8411aed8..912e5b13 100644
--- a/config_tempest/flavors.py
+++ b/config_tempest/flavors.py
@@ -56,7 +56,7 @@ class Flavors(object):
                 flavor_id = self.create_flavor(pref['name'], ram=pref['ram'])
                 self._conf.set('compute', pref['key'], flavor_id)
 
-    def create_flavor(self, flavor_name, ram=64, vcpus=1, disk=0):
+    def create_flavor(self, flavor_name, ram=64, vcpus=1, disk=1):
         """Create flavors or try to discover two smallest ones available.
 
         :param flavor_name: flavor name to be created (usually m1.nano or
diff --git a/roles/generate-tempestconf-file/tasks/test-demo-user.yaml b/roles/generate-tempestconf-file/tasks/test-demo-user.yaml
index a9fd50b4..e05090c2 100644
--- a/roles/generate-tempestconf-file/tasks/test-demo-user.yaml
+++ b/roles/generate-tempestconf-file/tasks/test-demo-user.yaml
@@ -12,7 +12,7 @@
           --public \
           --ram {{ item.ram }} \
           --vcpus 1 \
-          --disk 0 \
+          --disk 1 \
           {{ item.name }}
     with_items:
       - { name: "m1.nano", ram: 64 }