diff --git a/SAS/TMSS/test/t_tasks.py b/SAS/TMSS/test/t_tasks.py
index 1b4aefc9e56a1dccccb7fdbf92abac85068ace38..6bca6f3f1bc03fac0d59777fb195b5a50230921c 100755
--- a/SAS/TMSS/test/t_tasks.py
+++ b/SAS/TMSS/test/t_tasks.py
@@ -475,7 +475,7 @@ class SchedulingUnitBlueprintStateTest(unittest.TestCase):
             subtask.save()
         # Check task.status as precondition
         self.assertEqual(task_state, task.status,
-                         "PRECONDITION DOES NOT MET. Expect %s task to be equal to %s (but is %s)" % (
+                         "INCORRECT PRECONDITION. Expected %s task to have status=%s, but actual status=%s)" % (
                          task_type, task_state, task.status))
 
     def test_state_with_no_tasks(self):