diff -r 729f36a1bcfa -r 7725396eb3df web/test/data/schema.py
--- a/web/test/data/schema.py	Wed Apr 22 10:08:14 2015 +0200
+++ b/web/test/data/schema.py	Wed Mar 25 08:21:00 2015 +0100
@@ -93,9 +93,9 @@
     title = String(maxsize=32, required=True, fulltextindexed=True)
     concerns = SubjectRelation('Project', composite='object')
 
-# used by windmill for `test_edit_relation`
-from cubes.folder.schema import Folder
-
+class Folder(EntityType):
+    name = String(required=True)
+    filed_under = SubjectRelation('Folder', description=_('parent folder'))
 
 class TreeNode(EntityType):
     name = String(required=True)