diff --git a/swh/scheduler/tests/celery_testing.py b/swh/scheduler/tests/celery_testing.py
index 2859e9c..acc8ad6 100644
--- a/swh/scheduler/tests/celery_testing.py
+++ b/swh/scheduler/tests/celery_testing.py
@@ -1,18 +1,18 @@
 import os
 
 
 def setup_celery():
     os.environ.setdefault('CELERY_BROKER_URL', 'memory://')
     os.environ.setdefault('CELERY_RESULT_BACKEND', 'cache+memory://')
 
 
 class CeleryTestFixture:
     """Mix this in a test subject class to setup Celery config for testing
     purpose.
 
     Can be overriden by CELERY_BROKER_URL and CELERY_RESULT_BACKEND env vars.
     """
 
-    def setUp(sel):
+    def setUp(self):
         setup_celery()
         super().setUp()