diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8d53563..e69de29 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,4 +0,0 @@
-This project uses [Black] to format code. To avoid manually running `black .`,
-you can install a Git hook or a format-on-save plugin for your editor.
-
-[Black]: https://github.com/psf/black
diff --git a/django_object_actions/tests/test_utils.py b/django_object_actions/tests/test_utils.py
index 0df3969..da7a814 100644
--- a/django_object_actions/tests/test_utils.py
+++ b/django_object_actions/tests/test_utils.py
@@ -76,7 +76,7 @@ def test_get_button_attrs_gets_set(self):
 
     def test_get_button_attrs_custom_attrs_get_partitioned(self):
         mock_tool = type("mock_tool", (object,), {"attrs": {"nonstandard": "wombat"}})
-        attrs, custom = self.instance._get_button_attrs(mock_tool)
+        _attrs, custom = self.instance._get_button_attrs(mock_tool)
         self.assertEqual(custom["nonstandard"], "wombat")