diff --git a/testing/io/test_terminalwriter.py b/testing/io/test_terminalwriter.py
index d4b4786dd..9f85cee94 100644
--- a/testing/io/test_terminalwriter.py
+++ b/testing/io/test_terminalwriter.py
@@ -221,10 +221,11 @@ def test_NO_COLOR_and_FORCE_COLOR(
     monkeypatch.setitem(os.environ, "FORCE_COLOR", FORCE_COLOR)
     assert_color(expected)
 
+
 @pytest.mark.skipif(
     os.environ["TERM"] == "dumb" or "NO_COLOR" in os.environ,
-    reason="dumb terminals can't handle color"
-    )
+    reason="dumb terminals can't handle color",
+)
 def test_empty_NO_COLOR_and_FORCE_COLOR_ignored(monkeypatch: MonkeyPatch) -> None:
     monkeypatch.setitem(os.environ, "NO_COLOR", "")
     monkeypatch.setitem(os.environ, "FORCE_COLOR", "")