diff --git a/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0001_initial.py b/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0001_initial.py
index ad1c85a8716e2a5b9cc6eeab22aa60faebb5cd9a..664d10fa25687a243cfc038c2e16dc18f531701c 100644
--- a/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0001_initial.py
+++ b/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0001_initial.py
@@ -1,4 +1,4 @@
-# Generated by Django 3.0.9 on 2021-05-04 13:52
+# Generated by Django 3.0.9 on 2021-05-04 15:32
 
 from django.conf import settings
 import django.contrib.postgres.fields
diff --git a/SAS/TMSS/backend/src/tmss/tmssapp/models/specification.py b/SAS/TMSS/backend/src/tmss/tmssapp/models/specification.py
index d1979a287a47d05a934a2e75632b99c7e67aaf94..130cf7a6686b0a19a637e427054062ad06899fb9 100644
--- a/SAS/TMSS/backend/src/tmss/tmssapp/models/specification.py
+++ b/SAS/TMSS/backend/src/tmss/tmssapp/models/specification.py
@@ -19,24 +19,6 @@ from collections import Counter
 from django.utils.functional import cached_property
 from lofar.sas.tmss.tmss.exceptions import BlueprintCreationException, TMSSException
 
-#
-# Mixins
-#
-
-class ProjectPropertyMixin(RefreshFromDbInvalidatesCachedPropertiesMixin):
-    @cached_property
-    def project(self): # -> Project:
-        '''return the related project of this task
-        '''
-        if not hasattr(self, 'path_to_project'):
-            return TMSSException("Please define a 'path_to_project' attribute on the object for the ProjectPropertyMixin to function.")
-        obj = self
-        for attr in self.path_to_project.split('__'):
-            obj = getattr(obj, attr)
-            if attr == 'project':
-                return obj
-
-
 #
 # I/O
 #
diff --git a/SAS/TMSS/backend/test/t_tmssapp_specification_django_API.py b/SAS/TMSS/backend/test/t_tmssapp_specification_django_API.py
index cf04c92ecdda1c9ed5e92b0465b450c6f57227df..ca34a170f939b580acaa43417836317fdb300a4d 100755
--- a/SAS/TMSS/backend/test/t_tmssapp_specification_django_API.py
+++ b/SAS/TMSS/backend/test/t_tmssapp_specification_django_API.py
@@ -849,7 +849,7 @@ class SchedulingUnitBlueprintTest(unittest.TestCase):
         scheduling_unit_blueprint.scheduling_constraints_doc = {'foo': 'matic'}
         scheduling_unit_blueprint.save()
 
-   def test_SchedulingUnitBlueprint_gets_created_with_correct_is_triggered_flag(self):
+    def test_SchedulingUnitBlueprint_gets_created_with_correct_is_triggered_flag(self):
 
         # setup
         project = models.Project.objects.create(**Project_test_data(can_trigger=True))