diff --git a/tobiko/openstack/stacks/_ubuntu.py b/tobiko/openstack/stacks/_ubuntu.py
index 2e2e2489a..a7a3d15c8 100644
--- a/tobiko/openstack/stacks/_ubuntu.py
+++ b/tobiko/openstack/stacks/_ubuntu.py
@@ -149,7 +149,7 @@ class UbuntuImageFixture(UbuntuMinimalImageFixture,
 
 
 class UbuntuFlavorStackFixture(_nova.FlavorStackFixture):
-    ram = 128
+    ram = 256
     swap = 512