diff --git a/aleksis/apps/chronos/migrations/0015_drop_site.py b/aleksis/apps/chronos/migrations/0015_drop_site.py
index 861ec1e386ce12fe076ab67175a4e71605449f8c..708dee3b879fe81afb3afe2be3fc0bfd69bec478 100644
--- a/aleksis/apps/chronos/migrations/0015_drop_site.py
+++ b/aleksis/apps/chronos/migrations/0015_drop_site.py
@@ -56,13 +56,11 @@ class Migration(migrations.Migration):
             "extralesson",
             "holiday",
             "lesson",
-            "lessonevent",
             "lessonperiod",
             "lessonsubstitution",
             "subject",
             "supervision",
             "supervisionarea",
-            "supervisionevent",
             "supervisionsubstitution",
             "timeperiod",
             "validityrange"
diff --git a/aleksis/apps/chronos/tests/test_notifications.py b/aleksis/apps/chronos/tests/test_notifications.py
index 9180bc22f997093bd24d594083efc2b0c10969af..2e2393cb2b3fa962613615115ce57966b538af7a 100644
--- a/aleksis/apps/chronos/tests/test_notifications.py
+++ b/aleksis/apps/chronos/tests/test_notifications.py
@@ -32,26 +32,26 @@ class NotificationTests(TransactionTestCase):
         )
 
         self.teacher_a = Person.objects.create(
-            first_name="Teacher", last_name="A", short_name="A", email="test@example.org"
+            first_name="Teacher", last_name="A", short_name="A", email="test1@example.org"
         )
         self.teacher_b = Person.objects.create(
-            first_name="Teacher", last_name="B", short_name="B", email="test@example.org"
+            first_name="Teacher", last_name="B", short_name="B", email="test2@example.org"
         )
 
         self.student_a = Person.objects.create(
-            first_name="Student", last_name="A", email="test@example.org"
+            first_name="Student", last_name="A", email="test3@example.org"
         )
         self.student_b = Person.objects.create(
-            first_name="Student", last_name="B", email="test@example.org"
+            first_name="Student", last_name="B", email="test4@example.org"
         )
         self.student_c = Person.objects.create(
-            first_name="Student", last_name="C", email="test@example.org"
+            first_name="Student", last_name="C", email="test5@example.org"
         )
         self.student_d = Person.objects.create(
-            first_name="Student", last_name="D", email="test@example.org"
+            first_name="Student", last_name="D", email="test6@example.org"
         )
         self.student_e = Person.objects.create(
-            first_name="Student", last_name="E", email="test@example.org"
+            first_name="Student", last_name="E", email="test7@example.org"
         )
 
         self.group_a = Group.objects.create(
diff --git a/pyproject.toml b/pyproject.toml
index 5cfff6151a64e75d04deca420cf02906bd351698..9f00c3112ed5a0a4c78cfb767754ea2633397468 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,8 +51,8 @@ priority = "supplemental"
 [tool.poetry.dependencies]
 python = "^3.10"
 calendarweek = "^0.5.0"
-aleksis-core = "^4.0.0.dev1"
-aleksis-app-resint = "^4.0.0.dev0"
+aleksis-core = "^4.0.0.dev2"
+aleksis-app-resint = "^4.0.0.dev1"
 
 [tool.poetry.plugins."aleksis.app"]
 chronos = "aleksis.apps.chronos.apps:ChronosConfig"