the list of test directories should be calculated by products:list instead of dumb glob.

stack/erp5.cfg

@@ -280,8 +280,8 @@ initialization =
   sys.path[:0] = [os.path.join(parts_directory, x, 'tests')
                   for x in repository_id_list]
   sys.path[:0] = sum((
-    glob.glob(os.path.join(parts_directory, x, 'product', '*', 'tests'))
-    for x in repository_id_list), [])
+    glob.glob(os.path.join(x, '*', 'tests'))
+    for x in reversed('''${products:list}'''.split())), [])
 
 [test_suite_runner]
 # XXX: Workaround for fact ERP5Type is not an distribution and does not