diff --git a/perguntations/testfactory.py b/perguntations/testfactory.py
index d9b8217..89f605b 100644
--- a/perguntations/testfactory.py
+++ b/perguntations/testfactory.py
@@ -62,6 +62,7 @@ test_schema = schema.Schema({
         schema.Optional('points'): float
         }]
     }, ignore_extra_keys=True)
+    # FIXME schema error with 'testfile' which is added in the code
 
 # ============================================================================
 class TestFactoryException(Exception):
@@ -315,8 +316,11 @@ class TestFactory(dict):
             # normalize question points to scale
             if self['scale'] is not None:
                 scale_min, scale_max = self['scale']
+                factor = (scale_max - scale_min) / total_points
                 for question in questions:
-                    question['points'] *= (scale_max - scale_min) / total_points
+                    question['points'] *= factor
+                logger.debug('Points normalized from %g to [%g, %g]',
+                             total_points, scale_min, scale_max)
             else:
                 self['scale'] = [0, total_points]
         else:
--
libgit2 0.21.2