diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index aef73af..c4a942e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ stages:
   - test
   - quality-assurance
 
-py38-django31:
+py38:
   stage: test
   image: python:3-alpine
   before_script:
diff --git a/apps/participation/tests.py b/apps/participation/tests.py
index 8bbeefa..b748b5c 100644
--- a/apps/participation/tests.py
+++ b/apps/participation/tests.py
@@ -122,6 +122,32 @@ class TestStudentParticipation(TestCase):
         self.assertRedirects(response, reverse("participation:team_detail", args=(self.team.pk,)), 302, 200)
         self.assertTrue(Team.objects.filter(trigram="BBB", participation__problem=3).exists())
 
+    def test_participation_detail(self):
+        self.user.registration.team = self.team
+        self.user.registration.save()
+
+        response = self.client.get(reverse("participation:participation_detail", args=(self.team.participation.pk,)))
+        self.assertEqual(response.status_code, 200)
+
+    def test_upload_video(self):
+        self.user.registration.team = self.team
+        self.user.registration.save()
+
+        response = self.client.get(reverse("participation:upload_video", args=(self.team.participation.solution.pk,)))
+        self.assertEqual(response.status_code, 200)
+
+        response = self.client.post(reverse("participation:upload_video", args=(self.team.participation.solution.pk,)),
+                                    data=dict(link="https://youtube.com/watch?v=73nsrixx7eI"))
+        self.assertRedirects(response,
+                             reverse("participation:participation_detail", args=(self.team.participation.id,)),
+                             302, 200)
+        self.team.participation.refresh_from_db()
+        self.assertEqual(self.team.participation.solution.platform, "youtube")
+        self.assertEqual(self.team.participation.solution.youtube_code, "73nsrixx7eI")
+
+        response = self.client.get(reverse("participation:participation_detail", args=(self.team.participation.pk,)))
+        self.assertEqual(response.status_code, 200)
+
 
 class TestAdminForbidden(TestCase):
     def setUp(self) -> None:
diff --git a/apps/participation/views.py b/apps/participation/views.py
index 313f399..920bf56 100644
--- a/apps/participation/views.py
+++ b/apps/participation/views.py
@@ -147,7 +147,7 @@ class UploadVideoView(LoginRequiredMixin, UpdateView):
     def dispatch(self, request, *args, **kwargs):
         user = request.user
         if user.registration.is_admin or user.registration.participates\
-                and user.registration.team.participation.pk == self.object.participation.pk:
+                and user.registration.team.participation.pk == self.get_object().participation.pk:
             return super().dispatch(request, *args, **kwargs)
         raise PermissionDenied
 
diff --git a/apps/registration/views.py b/apps/registration/views.py
index 7b4819a..1b8acf7 100644
--- a/apps/registration/views.py
+++ b/apps/registration/views.py
@@ -4,7 +4,7 @@ from corres2math.tokens import email_validation_token
 from django.conf import settings
 from django.contrib.auth.mixins import LoginRequiredMixin
 from django.contrib.auth.models import User
-from django.core.exceptions import ValidationError, PermissionDenied
+from django.core.exceptions import PermissionDenied, ValidationError
 from django.db import transaction
 from django.http import FileResponse, Http404
 from django.shortcuts import redirect, resolve_url
diff --git a/tox.ini b/tox.ini
index 009e2e8..d9a9ec9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py38-django31
+    py38
 
     linters
 skipsdist = True