diff --git a/biosimulators_pysces/core.py b/biosimulators_pysces/core.py
index f1c5fbd..5c4b319 100644
--- a/biosimulators_pysces/core.py
+++ b/biosimulators_pysces/core.py
@@ -132,7 +132,7 @@ def exec_sed_task(task, variables, log=None):
             if setting is None:
                 if (
                     ALGORITHM_SUBSTITUTION_POLICY_LEVELS[algorithm_substitution_policy]
-                    <= ALGORITHM_SUBSTITUTION_POLICY_LEVELS[AlgorithmSubstitutionPolicy.SAME_METHOD]
+                    <= ALGORITHM_SUBSTITUTION_POLICY_LEVELS[AlgorithmSubstitutionPolicy.NONE]
                 ):
                     msg = "".join([
                         "Algorithm parameter with KiSAO id '{}' is not supported. ".format(change.kisao_id),
@@ -155,7 +155,7 @@ def exec_sed_task(task, variables, log=None):
             if not validate_str_value(value, setting['type']):
                 if (
                     ALGORITHM_SUBSTITUTION_POLICY_LEVELS[algorithm_substitution_policy]
-                    <= ALGORITHM_SUBSTITUTION_POLICY_LEVELS[AlgorithmSubstitutionPolicy.SAME_METHOD]
+                    <= ALGORITHM_SUBSTITUTION_POLICY_LEVELS[AlgorithmSubstitutionPolicy.NONE]
                 ):
                     msg = "'{}' is not a valid {} value for parameter {}".format(
                         value, setting['type'].name, change.kisao_id)
diff --git a/tests/test_core_main.py b/tests/test_core_main.py
index d25a166..3cd8d0b 100644
--- a/tests/test_core_main.py
+++ b/tests/test_core_main.py
@@ -103,7 +103,7 @@ def test_exec_sed_task_successfully(self):
             self.assertFalse(numpy.any(numpy.isnan(results)))
 
     def test_exec_sed_task_error_handling(self):
-        with mock.patch.dict('os.environ', {'ALGORITHM_SUBSTITUTION_POLICY': 'SAME_METHOD'}):
+        with mock.patch.dict('os.environ', {'ALGORITHM_SUBSTITUTION_POLICY': 'NONE'}):
             task = sedml_data_model.Task(
                 model=sedml_data_model.Model(
                     source=os.path.join(os.path.dirname(__file__), 'fixtures', 'biomd0000000002.xml'),
@@ -216,7 +216,7 @@ def test_exec_sed_task_error_handling(self):
         variables = []
 
         task.simulation.algorithm.changes[0].new_value = 'not a number'
-        with mock.patch.dict('os.environ', {'ALGORITHM_SUBSTITUTION_POLICY': 'SAME_METHOD'}):
+        with mock.patch.dict('os.environ', {'ALGORITHM_SUBSTITUTION_POLICY': 'NONE'}):
             with self.assertRaisesRegex(ValueError, 'is not a valid'):
                 core.exec_sed_task(task, variables)
 
@@ -225,7 +225,7 @@ def test_exec_sed_task_error_handling(self):
                 core.exec_sed_task(task, variables)
 
         task.simulation.algorithm.changes[0].kisao_id = 'KISAO_9999999'
-        with mock.patch.dict('os.environ', {'ALGORITHM_SUBSTITUTION_POLICY': 'SAME_METHOD'}):
+        with mock.patch.dict('os.environ', {'ALGORITHM_SUBSTITUTION_POLICY': 'NONE'}):
             with self.assertRaisesRegex(NotImplementedError, 'is not supported'):
                 core.exec_sed_task(task, variables)