diff --git a/.travis.yml b/.travis.yml
index b65d5b1dd..c2ab9f6c1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,8 @@ python:
   - "2.7"
 install:
   - pip install -r requirements.txt --use-mirrors
-  - pip install coverage django-discover-runner
+  - pip install coverage django-discover-runner pep8
   - python extras/scripts/create_local_settings.py
-script: coverage run ./manage.py test tests && coverage report -m
+script:
+  - coverage run ./manage.py test tests && coverage report -m
+  - pep8 --max-line-length=150 openslides | grep -v utils/pdf.py | grep -v urls.py | grep -v motion/
diff --git a/openslides/participant/models.py b/openslides/participant/models.py
index 0adb6219d..bd771945d 100644
--- a/openslides/participant/models.py
+++ b/openslides/participant/models.py
@@ -138,7 +138,9 @@ class Group(DjangoGroup, PersonMixin, Person, SlideMixin):
     person_prefix = 'group'
 
     django_group = models.OneToOneField(DjangoGroup, editable=False, parent_link=True)
-    group_as_person = models.BooleanField(default=False, verbose_name=_("Use this group as participant"), help_text=_('For example as submitter of a motion.'))
+    group_as_person = models.BooleanField(
+        default=False, verbose_name=_("Use this group as participant"),
+        help_text=_('For example as submitter of a motion.'))
     description = models.TextField(blank=True, verbose_name=_("Description"))
 
     @models.permalink