apps/participation/tests.py

@@ -409,6 +409,12 @@ class TestStudentParticipation(TestCase):
         self.user.registration.team = self.team
         self.user.registration.save()
 
+        # Team is pending validation
+        self.team.participation.valid = False
+        self.team.participation.save()
+        response = self.client.post(reverse("participation:team_leave"))
+        self.assertEqual(response.status_code, 403)
+
         # Team is valid
         self.team.participation.valid = True
         self.team.participation.save()

apps/participation/views.py

@@ -341,7 +341,7 @@ class TeamLeaveView(LoginRequiredMixin, TemplateView):
             return self.handle_no_permission()
         if not request.user.registration.participates or not request.user.registration.team:
             raise PermissionDenied(_("You are not in a team."))
-        if request.user.registration.team.participation.valid:
+        if request.user.registration.team.participation.valid is not None:
             raise PermissionDenied(_("The team is already validated or the validation is pending."))
         return super().dispatch(request, *args, **kwargs)