diff --git a/aleksis/apps/alsijil/actions.py b/aleksis/apps/alsijil/actions.py
index 698c61670422eccb73bc3da4ea3a7426b27efc7b..6aedbc2ae0c8451fa32fe1157b97f5d3fb355229 100644
--- a/aleksis/apps/alsijil/actions.py
+++ b/aleksis/apps/alsijil/actions.py
@@ -9,8 +9,6 @@ from django.utils.translation import gettext_lazy as _
 
 from aleksis.core.models import Notification
 
-from django.utils.translation import gettext_lazy as _
-
 
 def mark_as_excused(modeladmin, request, queryset):
     queryset.update(excused=True, excuse_type=None)
@@ -41,6 +39,7 @@ def delete_personal_note(modeladmin, request, queryset):
 
 delete_personal_note.short_description = _("Delete")
 
+
 def send_request_to_check_entry(modeladmin, request: HttpRequest, selected_items: Sequence[dict]):
     """Send notifications to the teachers of the selected register objects.
 
diff --git a/aleksis/apps/alsijil/filters.py b/aleksis/apps/alsijil/filters.py
index ca793aa5aa20a36bb913fffc8c6656bf3064b5e1..178481942e11b1e36ca3a614fc830a39aca3fdb4 100644
--- a/aleksis/apps/alsijil/filters.py
+++ b/aleksis/apps/alsijil/filters.py
@@ -1,6 +1,6 @@
 from django.utils.translation import gettext as _
 
-from django_filters import FilterSet, CharFilter, ModelMultipleChoiceFilter, DateFilter
+from django_filters import CharFilter, DateFilter, FilterSet, ModelMultipleChoiceFilter
 from material import Layout, Row
 
 from .models import ExcuseType, PersonalNote
@@ -19,7 +19,7 @@ class PersonalNoteFilter(FilterSet):
             Row("subject"),
             Row("day_start", "day_end"),
             Row("absent", "excused", "excuse_type"),
-            Row("late__gt", "late__lt", "extra_marks")
+            Row("late__gt", "late__lt", "extra_marks"),
         )
 
     class Meta:
@@ -27,7 +27,7 @@ class PersonalNoteFilter(FilterSet):
         fields = {
             "excused": ["exact"],
             "late": ["lt", "gt"],
-            "absent": ['exact'],
+            "absent": ["exact"],
             "excuse_type": ["exact"],
             "extra_marks": ["exact"],
         }
diff --git a/aleksis/apps/alsijil/forms.py b/aleksis/apps/alsijil/forms.py
index 67e906e275adbf6ab2daf29341f52cecd3365359..2417754338f2d9d6e4dd3b0cebb76e6e6bb32288 100644
--- a/aleksis/apps/alsijil/forms.py
+++ b/aleksis/apps/alsijil/forms.py
@@ -16,7 +16,6 @@ from aleksis.apps.chronos.managers import TimetableType
 from aleksis.apps.chronos.models import Subject, TimePeriod
 from aleksis.core.forms import ActionForm, ListActionForm
 from aleksis.core.models import Group, Person, SchoolTerm
-from aleksis.apps.chronos.models import TimePeriod
 from aleksis.core.util.core_helpers import get_site_preferences
 from aleksis.core.util.predicates import check_global_permission
 
@@ -27,7 +26,6 @@ from .actions import (
     mark_as_unexcused,
     send_request_to_check_entry,
 )
-
 from .models import (
     ExcuseType,
     ExtraMark,
diff --git a/aleksis/apps/alsijil/managers.py b/aleksis/apps/alsijil/managers.py
index 555042a1257138cb6494760ccd89f4d7b45207c1..696874bdfc15ed8f7e1069f6801a133a269c7289 100644
--- a/aleksis/apps/alsijil/managers.py
+++ b/aleksis/apps/alsijil/managers.py
@@ -78,15 +78,9 @@ class RegisterObjectRelatedQuerySet(QuerySet):
         """
         return self.annotate(
             subject=Case(
-                When(
-                    lesson_period__isnull=False,
-                    then="lesson_period__lesson__subject__name",
-                ),
-                When(
-                    extra_lesson__isnull=False,
-                    then="extra_lesson__subject__name",
-                ),
-                default=Value(_("Event"))
+                When(lesson_period__isnull=False, then="lesson_period__lesson__subject__name",),
+                When(extra_lesson__isnull=False, then="extra_lesson__subject__name",),
+                default=Value(_("Event")),
             )
         )
 
diff --git a/aleksis/apps/alsijil/tables.py b/aleksis/apps/alsijil/tables.py
index 1a71b901c64f6684a344474687bb247c2f1438bb..e7fb6df6da3e9a80e0ae3e51e8c8674200e94176 100644
--- a/aleksis/apps/alsijil/tables.py
+++ b/aleksis/apps/alsijil/tables.py
@@ -87,9 +87,7 @@ class GroupRoleTable(tables.Table):
 
 
 class PersonalNoteTable(tables.Table):
-    selected = SelectColumn(
-        attrs={"input": {"name": "selected_objects"}}, accessor=A("pk")
-    )
+    selected = SelectColumn(attrs={"input": {"name": "selected_objects"}}, accessor=A("pk"))
     date = tables.Column(
         verbose_name=_("Date"), accessor=A("date_formatted"), order_by=A("day_start")
     )
@@ -121,9 +119,14 @@ class PersonalNoteTable(tables.Table):
             return value
 
     def render_absent(self, value):
-        return render_to_string(
-            "components/materialize-chips.html", dict(content="Absent", classes="red white-text")
-        ) if value else "–"
+        return (
+            render_to_string(
+                "components/materialize-chips.html",
+                dict(content="Absent", classes="red white-text"),
+            )
+            if value
+            else "–"
+        )
 
     def render_excused(self, value, record):
         if record.absent:
diff --git a/aleksis/apps/alsijil/views.py b/aleksis/apps/alsijil/views.py
index ac76e5451057210b18ff282b23a7dbbf74b8983e..18a3547d1909220e4253b9e6c46675ce47a4e118 100644
--- a/aleksis/apps/alsijil/views.py
+++ b/aleksis/apps/alsijil/views.py
@@ -825,13 +825,17 @@ def overview_person(request: HttpRequest, id_: Optional[int] = None) -> HttpResp
         )
         .order_by(
             "-school_term_start", "-order_year", "-order_week", "-order_weekday", "order_period",
-        ).annotate_date_range().annotate_subject()
+        )
+        .annotate_date_range()
+        .annotate_subject()
     )
     personal_note_filter_object = PersonalNoteFilter(request.GET, queryset=personal_notes)
     filtered_personal_notes = personal_note_filter_object.qs
     context["personal_note_filter_form"] = personal_note_filter_object.form
     used_filters = list(personal_note_filter_object.data.values())
-    context["num_filters"] = len(used_filters) - used_filters.count("") - used_filters.count("unknown")
+    context["num_filters"] = (
+        len(used_filters) - used_filters.count("") - used_filters.count("unknown")
+    )
 
     personal_notes_list = []
     for note in personal_notes: