diff --git a/pretalx_broadcast_tools/signals.py b/pretalx_broadcast_tools/signals.py
index 3a8a105..8706744 100644
--- a/pretalx_broadcast_tools/signals.py
+++ b/pretalx_broadcast_tools/signals.py
@@ -1,7 +1,7 @@
 from django.dispatch import receiver
 from django.urls import resolve, reverse
-from django.utils.translation import gettext_noop
 from django.utils.translation import gettext_lazy as _
+from django.utils.translation import gettext_noop
 from i18nfield.strings import LazyI18nString
 from pretalx.common.models.settings import hierarkey
 from pretalx.common.signals import register_data_exporters
diff --git a/pretalx_broadcast_tools/views.py b/pretalx_broadcast_tools/views.py
index fc05d0f..d50bd75 100644
--- a/pretalx_broadcast_tools/views.py
+++ b/pretalx_broadcast_tools/views.py
@@ -127,7 +127,9 @@ class BroadcastToolsScheduleView(EventPermissionRequired, ScheduleMixin, View):
                     "talks": [
                         {
                             "id": talk.submission.id,
-                            "start": talk.start.astimezone(schedule.event.tz).isoformat(),
+                            "start": talk.start.astimezone(
+                                schedule.event.tz
+                            ).isoformat(),
                             "end": (talk.start + dt.timedelta(minutes=talk.duration))
                             .astimezone(schedule.event.tz)
                             .isoformat(),