diff --git a/openregistry/api/tests/base.py b/openregistry/api/tests/base.py
index 0ef487b..504e769 100644
--- a/openregistry/api/tests/base.py
+++ b/openregistry/api/tests/base.py
@@ -16,6 +16,7 @@
 from openregistry.api.constants import VERSION, SESSION
 
 
+
 now = datetime.now()
 
 
@@ -33,6 +34,29 @@ def snitch(func):
                         'test_' + func.func_name, closure=func.func_closure)
 
 
+def create_blacklist(status_changes, statuses):
+    # This cycle generate black list for every status and
+    # every auth role
+    status_blacklist = {}
+    for status in statuses:
+        status_blacklist[status] = {}
+        for auth_role in ['lot_owner', 'Administrator', 'convoy', 'concierge']:
+            status_blacklist[status][auth_role] = []
+            for w in status_changes[status]['next_status']:
+                if auth_role in status_changes[status]['next_status'][w]:
+                    status_blacklist[status][auth_role].append(w)
+            if auth_role in status_changes[status]['editing_permissions']:
+                status_blacklist[status][auth_role].append(status)
+            black_list = list(set(statuses) - set(status_blacklist[status][auth_role]))
+            status_blacklist[status][auth_role] = black_list
+            if auth_role == 'lot_owner':
+                status_blacklist[status]['broker'] = status_blacklist[status]['lot_owner']
+                del status_blacklist[status]['lot_owner']
+            if auth_role == 'Administrator':
+                status_blacklist[status]['administrator'] = status_blacklist[status]['Administrator']
+                del status_blacklist[status]['Administrator']
+    return  status_blacklist
+
 class PrefixedRequestClass(webtest.app.TestRequest):
 
     @classmethod