diff --git a/ldapauthenticator/ldapauthenticator.py b/ldapauthenticator/ldapauthenticator.py
index 95795cf..e010180 100644
--- a/ldapauthenticator/ldapauthenticator.py
+++ b/ldapauthenticator/ldapauthenticator.py
@@ -311,7 +311,7 @@ def _validate_bind_dn_template(self, proposal):
         List of user attributes to be returned in auth_state
 
         Will be available in `auth_state["user_attributes"]`
-        """
+        """,
     )
 
     use_lookup_dn_username = Bool(
diff --git a/ldapauthenticator/tests/test_ldapauthenticator.py b/ldapauthenticator/tests/test_ldapauthenticator.py
index 03a83a3..9c037f3 100644
--- a/ldapauthenticator/tests/test_ldapauthenticator.py
+++ b/ldapauthenticator/tests/test_ldapauthenticator.py
@@ -125,6 +125,7 @@ async def test_ldap_auth_search_filter(authenticator):
     )
     assert authorized is None
 
+
 async def test_allow_config(authenticator):
     # test various sources of allow config
 
@@ -167,7 +168,9 @@ async def test_ldap_auth_state_attributes(authenticator):
         None, {"username": "fry", "password": "fry"}
     )
     assert authorized["name"] == "fry"
-    assert authorized["auth_state"]["user_attributes"] == {"employeeType": ["Delivery boy"]}
+    assert authorized["auth_state"]["user_attributes"] == {
+        "employeeType": ["Delivery boy"]
+    }
 
 
 async def test_ldap_auth_state_attributes2(authenticator):