Try to add CI

apps/participation/admin.py

@@ -1,3 +0,0 @@
-from django.contrib import admin
-
-# Register your models here.

apps/participation/models.py

@@ -2,7 +2,6 @@ from django.core.validators import RegexValidator
 from django.db import models
 from django.db.models import Index
 from django.utils.crypto import get_random_string
-from django.utils.functional import lazy
 from django.utils.text import format_lazy
 from django.utils.translation import gettext_lazy as _
 
@@ -120,7 +119,7 @@ class Video(models.Model):
 
     def __str__(self):
         return _("Video of team {name} ({trigram})")\
-            .format(name=self.participation.team.name, trigram = self.participation.team.trigram)
+            .format(name=self.participation.team.name, trigram=self.participation.team.trigram)
 
     class Meta:
         verbose_name = _("video")

apps/participation/tests.py

@@ -1,3 +0,0 @@
-from django.test import TestCase
-
-# Create your tests here.

apps/participation/views.py

@@ -5,8 +5,8 @@ from django.urls import reverse_lazy
 from django.utils.translation import gettext_lazy as _
 from django.views.generic import CreateView, FormView, DetailView, RedirectView, UpdateView
 
-from participation.forms import TeamForm, JoinTeamForm, ParticipationForm
-from participation.models import Team
+from .forms import TeamForm, JoinTeamForm, ParticipationForm
+from .models import Team
 
 
 class CreateTeamView(LoginRequiredMixin, CreateView):