diff --git a/aleksis/apps/alsijil/data_checks.py b/aleksis/apps/alsijil/data_checks.py
index a6bd822a3731553e01d982687af367e0f165e7be..97062cc54712051d9db8a6b1f8eaa9a4e44b60e0 100644
--- a/aleksis/apps/alsijil/data_checks.py
+++ b/aleksis/apps/alsijil/data_checks.py
@@ -5,7 +5,7 @@ from django.db.models.query_utils import Q
 from django.utils.translation import gettext as _
 
 from aleksis.apps.chronos.util.date import week_weekday_to_date
-from aleksis.core.data_checks import DATA_CHECK_REGISTRY, DataCheck, IgnoreSolveOption, SolveOption
+from aleksis.core.data_checks import DataCheck, IgnoreSolveOption, SolveOption
 
 
 class DeleteRelatedObjectSolveOption(SolveOption):
@@ -41,7 +41,6 @@ class ResetPersonalNoteSolveOption(SolveOption):
         check_result.delete()
 
 
-@DATA_CHECK_REGISTRY.register
 class NoPersonalNotesInCancelledLessonsDataCheck(DataCheck):
     name = "no_personal_notes_in_cancelled_lessons"
     verbose_name = _("Ensure that there are no personal notes in cancelled lessons")
@@ -66,7 +65,6 @@ class NoPersonalNotesInCancelledLessonsDataCheck(DataCheck):
             cls.register_result(note)
 
 
-@DATA_CHECK_REGISTRY.register
 class NoGroupsOfPersonsSetInPersonalNotesDataCheck(DataCheck):
     name = "no_groups_of_persons_set_in_personal_notes"
     verbose_name = _("Ensure that 'groups_of_person' is set for every personal note")
@@ -88,7 +86,6 @@ class NoGroupsOfPersonsSetInPersonalNotesDataCheck(DataCheck):
             cls.register_result(note)
 
 
-@DATA_CHECK_REGISTRY.register
 class LessonDocumentationOnHolidaysDataCheck(DataCheck):
     """Checks for lesson documentation objects on holidays.
 
@@ -123,7 +120,6 @@ class LessonDocumentationOnHolidaysDataCheck(DataCheck):
                 cls.register_result(doc)
 
 
-@DATA_CHECK_REGISTRY.register
 class PersonalNoteOnHolidaysDataCheck(DataCheck):
     """Checks for personal note objects on holidays.
 
@@ -158,7 +154,6 @@ class PersonalNoteOnHolidaysDataCheck(DataCheck):
                 cls.register_result(note)
 
 
-@DATA_CHECK_REGISTRY.register
 class ExcusesWithoutAbsences(DataCheck):
     name = "excuses_without_absences"
     verbose_name = _("Ensure that there are no excused personal notes without an absence")
diff --git a/aleksis/apps/alsijil/models.py b/aleksis/apps/alsijil/models.py
index b7d974572d3e0cfce4324ab96b4cc8494c198038..dc92c009fcb7fa2e40d90e66f0878bdee552b61e 100644
--- a/aleksis/apps/alsijil/models.py
+++ b/aleksis/apps/alsijil/models.py
@@ -5,6 +5,13 @@ from django.utils.translation import gettext_lazy as _
 
 from calendarweek import CalendarWeek
 
+from aleksis.apps.alsijil.data_checks import (
+    ExcusesWithoutAbsences,
+    LessonDocumentationOnHolidaysDataCheck,
+    NoGroupsOfPersonsSetInPersonalNotesDataCheck,
+    NoPersonalNotesInCancelledLessonsDataCheck,
+    PersonalNoteOnHolidaysDataCheck,
+)
 from aleksis.apps.alsijil.managers import PersonalNoteManager
 from aleksis.apps.chronos.mixins import WeekRelatedMixin
 from aleksis.apps.chronos.models import LessonPeriod
@@ -46,6 +53,13 @@ class PersonalNote(ExtensibleModel, WeekRelatedMixin):
     and remarks about a student in a single lesson period.
     """
 
+    data_checks = [
+        NoPersonalNotesInCancelledLessonsDataCheck,
+        NoGroupsOfPersonsSetInPersonalNotesDataCheck,
+        PersonalNoteOnHolidaysDataCheck,
+        ExcusesWithoutAbsences,
+    ]
+
     objects = PersonalNoteManager()
 
     person = models.ForeignKey("core.Person", models.CASCADE, related_name="personal_notes")
@@ -126,6 +140,8 @@ class LessonDocumentation(ExtensibleModel, WeekRelatedMixin):
     Non-personal, includes the topic and homework of the lesson.
     """
 
+    data_checks = [LessonDocumentationOnHolidaysDataCheck]
+
     week = models.IntegerField()
     year = models.IntegerField(verbose_name=_("Year"), default=get_current_year)