diff --git a/SAS/ResourceAssignment/TaskPrescheduler/test/test_taskprescheduler.py b/SAS/ResourceAssignment/TaskPrescheduler/test/test_taskprescheduler.py
index caee9c0c927ddc9742575710ff9e92487a1e48ea..3cbe34c59b3fe6b5abf62b1e4ff19d42b838f0dd 100755
--- a/SAS/ResourceAssignment/TaskPrescheduler/test/test_taskprescheduler.py
+++ b/SAS/ResourceAssignment/TaskPrescheduler/test/test_taskprescheduler.py
@@ -306,7 +306,7 @@ class PreschedulerTest(unittest.TestCase):
         self.assertEqual(cobalt_settings, self.test_cobalt_settings)
         self.assertEqual(int, type(cobalt_settings['blockSize']))
         self.assertEqual(int, type(cobalt_settings['nrBlocks']))
-        self.assertEqual(int, type(cobalt_settings['nrSubBlocks']))
+        self.assertEqual(int, type(cobalt_settings['nrSubblocks']))
 
     def test_calculateCobaltSettingsAndConvertToOTDBsettings(self):
         '''combination of test_CobaltOTDBsettings and test_calculateCobaltSettings