diff --git a/social_core/backends/checkin.py b/social_core/backends/checkin.py
index dcff5244d..845e6a976 100644
--- a/social_core/backends/checkin.py
+++ b/social_core/backends/checkin.py
@@ -64,9 +64,7 @@ def get_user_details(self, response):
 
     def entitlement_allowed(self, user_entitlements):
         allowed = True
-        allowed_ent = self.setting(
-            "ALLOWED_ENTITLEMENTS", self.ALLOWED_ENTITLEMENTS
-        )
+        allowed_ent = self.setting("ALLOWED_ENTITLEMENTS", self.ALLOWED_ENTITLEMENTS)
         if allowed_ent:
             allowed = any(e in user_entitlements for e in allowed_ent)
         return allowed
diff --git a/social_core/tests/backends/test_checkin.py b/social_core/tests/backends/test_checkin.py
index 31eb794a8..11366618f 100644
--- a/social_core/tests/backends/test_checkin.py
+++ b/social_core/tests/backends/test_checkin.py
@@ -3,6 +3,7 @@
 from .oauth import OAuth2Test
 from .test_open_id_connect import OpenIdConnectTestMixin
 
+
 class CheckinOpenIdConnectTest(OpenIdConnectTestMixin, OAuth2Test):
     backend_path = "social_core.backends.checkin.CheckinOpenIdConnect"
     issuer = "https://aai.egi.eu/auth/realms/egi"
@@ -298,18 +299,21 @@ class CheckinOpenIdConnectTest(OpenIdConnectTestMixin, OAuth2Test):
     )
 
     def test_checkin_env_prod(self):
-        self.assertEqual(self.backend.oidc_endpoint(), 
-                         "https://aai.egi.eu/auth/realms/egi")
+        self.assertEqual(
+            self.backend.oidc_endpoint(), "https://aai.egi.eu/auth/realms/egi"
+        )
 
     def test_checkin_env_demo(self):
         self.backend.CHECKIN_ENV = "demo"
-        self.assertEqual(self.backend.oidc_endpoint(), 
-                         "https://aai-demo.egi.eu/auth/realms/egi")
-    
+        self.assertEqual(
+            self.backend.oidc_endpoint(), "https://aai-demo.egi.eu/auth/realms/egi"
+        )
+
     def test_checkin_env_dev(self):
         self.backend.CHECKIN_ENV = "dev"
-        self.assertEqual(self.backend.oidc_endpoint(), 
-                         "https://aai-dev.egi.eu/auth/realms/egi")
+        self.assertEqual(
+            self.backend.oidc_endpoint(), "https://aai-dev.egi.eu/auth/realms/egi"
+        )
 
     def test_entitlements_empty(self):
         self.assertEqual(self.backend.entitlement_allowed([]), True)