diff --git a/product/ERP5Type/tests/ERP5TypeTestCase.py b/product/ERP5Type/tests/ERP5TypeTestCase.py
index 89b2725615913a3c144b2694d62a6e4c999f45ae..2c4f3a2c8fa8991fe987d4204798d48af176a4a4 100644
--- a/product/ERP5Type/tests/ERP5TypeTestCase.py
+++ b/product/ERP5Type/tests/ERP5TypeTestCase.py
@@ -660,6 +660,10 @@ class ERP5TypeTestCaseMixin(ProcessingNodeTestCase, PortalTestCase):
 
         return ResponseWrapper(response, outstream, path)
 
+    def getConsistencyMessageList(self, obj):
+        return sorted([ str(message.getMessage())
+                        for message in obj.checkConsistency() ])
+
 class ERP5TypeCommandLineTestCase(ERP5TypeTestCaseMixin):
 
     def getPortalName(self):