diff --git a/oauthenticator/tests/test_generic.py b/oauthenticator/tests/test_generic.py
index 71f26683..6354c328 100644
--- a/oauthenticator/tests/test_generic.py
+++ b/oauthenticator/tests/test_generic.py
@@ -335,9 +335,13 @@ async def test_generic_claim_groups_key_nested_strings(
     assert auth_model["admin"]
 
 
-async def test_generic_auth_model_groups_key_callable(get_authenticator, generic_client):
+async def test_generic_auth_model_groups_key_callable(
+    get_authenticator, generic_client
+):
     c = Config()
-    c.GenericOAuthenticator.auth_model_groups_key = lambda r: r["auth_state"]["oauth_user"]["policies"]["roles"]
+    c.GenericOAuthenticator.auth_model_groups_key = lambda r: r["auth_state"][
+        "oauth_user"
+    ]["policies"]["roles"]
     c.GenericOAuthenticator.allowed_groups = ["super_user"]
     authenticator = get_authenticator(config=c)
 
@@ -352,7 +356,9 @@ async def test_generic_auth_model_groups_key_nested_strings(
     get_authenticator, generic_client
 ):
     c = Config()
-    c.GenericOAuthenticator.auth_model_groups_key = "auth_state.oauth_user.permissions.groups"
+    c.GenericOAuthenticator.auth_model_groups_key = (
+        "auth_state.oauth_user.permissions.groups"
+    )
     c.GenericOAuthenticator.admin_groups = ["super_user"]
     authenticator = get_authenticator(config=c)