diff --git a/biosimulators_tellurium/core.py b/biosimulators_tellurium/core.py
index 1526124..d9b0e25 100644
--- a/biosimulators_tellurium/core.py
+++ b/biosimulators_tellurium/core.py
@@ -427,7 +427,7 @@ def preprocess_sed_task(task, variables, config=None, simulator_config=None):
                         att = param_props['id']
                         if "roadrunner_attribute" in param_props:
                             att = param_props['roadrunner_attribute']
-                            setattr(solver, att, new_value)
+                        setattr(solver, att, new_value)
 
                     else:
                         if (
diff --git a/biosimulators_tellurium/data_model.py b/biosimulators_tellurium/data_model.py
index 9018194..61094d8 100644
--- a/biosimulators_tellurium/data_model.py
+++ b/biosimulators_tellurium/data_model.py
@@ -56,6 +56,7 @@ class PlottingEngine(str, enum.Enum):
             'KISAO_0000571': {
                 'kisao_id': 'KISAO_0000571',
                 'id': 'absolute_tolerance_adjustment_factor',
+                'roadrunner_attribute': 'absolute_tolerance',
                 'name': 'absolute tolerance adjustment factor',
                 'type': ValueType.float,
                 'default': 1e-12,
diff --git a/tests/test_core_main.py b/tests/test_core_main.py
index bbb1f77..1c44adb 100644
--- a/tests/test_core_main.py
+++ b/tests/test_core_main.py
@@ -522,9 +522,9 @@ def test_exec_sed_task_with_preprocesssed_task(self):
         variable_results, log = core.exec_sed_task(task, variables, preprocessed_task=preprocessed_task)
         with self.assertRaises(AssertionError):
             numpy.testing.assert_allclose(variable_results['C'][-1], end_c)
-        mid_c = preprocessed_task.road_runner['C']
-        mid_m = preprocessed_task.road_runner['M']
-        mid_x = preprocessed_task.road_runner['X']
+        mid_c = preprocessed_task.road_runner[task.id]['C']
+        mid_m = preprocessed_task.road_runner[task.id]['M']
+        mid_x = preprocessed_task.road_runner[task.id]['X']
         self.assertIsInstance(mid_c, float)
 
         variable_results, log = core.exec_sed_task(task, variables, preprocessed_task=preprocessed_task)