diff --git a/SAS/TMSS/src/tmss/tmssapp/populate.py b/SAS/TMSS/src/tmss/tmssapp/populate.py
index d9f964aae6c3d0b9ac70e02c653edcce27eb4c2a..b786248f34773046434364d3ddc887ecd6d59e3a 100644
--- a/SAS/TMSS/src/tmss/tmssapp/populate.py
+++ b/SAS/TMSS/src/tmss/tmssapp/populate.py
@@ -55,6 +55,12 @@ def populate_test_data():
             from lofar.sas.tmss.test.tmss_test_data_django_models import SchedulingSet_test_data, SchedulingUnitDraft_test_data
             from lofar.sas.tmss.tmss.tmssapp.tasks import create_task_blueprints_and_subtasks_from_scheduling_unit_draft, create_task_blueprints_and_subtasks_and_schedule_subtasks_from_scheduling_unit_draft
             from lofar.sas.tmss.tmss.tmssapp.subtasks import schedule_subtask
+            from lofar.common.json_utils import get_default_json_object_for_schema
+
+            constraints_template = models.SchedulingConstraintsTemplate.objects.get(name="constraints")
+            constraints_spec = get_default_json_object_for_schema(constraints_template.schema)
+
+            strategy_template = models.SchedulingUnitObservingStrategyTemplate.objects.get(name="UC1 CTC+pipelines")
 
             # create a Test Scheduling Set UC1 under project TMSS-Commissioning
             tmss_project = models.Project.objects.get(name="TMSS-Commissioning")
@@ -67,8 +73,6 @@ def populate_test_data():
                 logger.info('created test scheduling_set: %s', scheduling_set.name)
 
                 for unit_nr in range(5):
-                    strategy_template = models.SchedulingUnitObservingStrategyTemplate.objects.get(name="UC1 CTC+pipelines")
-
 
                     # the 'template' in the strategy_template is a predefined json-data blob which validates against the given scheduling_unit_template
                     # a user might 'upload' a partial json-data blob, so add all the known defaults
@@ -79,7 +83,9 @@ def populate_test_data():
                                                                                       scheduling_set=scheduling_set,
                                                                                       requirements_template=strategy_template.scheduling_unit_template,
                                                                                       requirements_doc=scheduling_unit_spec,
-                                                                                      observation_strategy_template=strategy_template)
+                                                                                      observation_strategy_template=strategy_template,
+                                                                                      scheduling_constraints_doc=constraints_spec,
+                                                                                      scheduling_constraints_template=constraints_template)
                     scheduling_unit_draft.tags = ["TEST", "UC1"]
                     scheduling_unit_draft.save()