diff --git a/src/pretix/control/views/main.py b/src/pretix/control/views/main.py
index 4e8162b109..6ab86eaaa6 100644
--- a/src/pretix/control/views/main.py
+++ b/src/pretix/control/views/main.py
@@ -204,6 +204,7 @@ class EventWizard(SafeSessionWizardView):
             event.organizer = foundation_data['organizer']
             event.plugins = settings.PRETIX_PLUGINS_DEFAULT
             event.has_subevents = foundation_data['has_subevents']
+            event.testmode = True
             form_dict['basics'].save()
 
             has_control_rights = self.request.user.teams.filter(