Fix missing call (#72)

Co-authored-by: aapetrushkin <[email protected]>

Author: hazzari

tests/test_server/test_urls.py

@@ -4,7 +4,7 @@
 from django.test import Client
 
 
-@pytest.mark.django_db()()
+@pytest.mark.django_db()
 def test_health_check(client: Client) -> None:
     """This test ensures that health check is accessible."""
     response = client.get('/health/')