diff --git a/tests/basic/test_coder.py b/tests/basic/test_coder.py
index bb93ad107..cb18efa43 100644
--- a/tests/basic/test_coder.py
+++ b/tests/basic/test_coder.py
@@ -1202,7 +1202,9 @@ This command will print 'Hello, World!' to the console."""
             self.assertEqual(coder.normalize_language("fr_FR"), "French")
             self.assertEqual(coder.normalize_language("es"), "Spanish")
             self.assertEqual(coder.normalize_language("de_DE.UTF-8"), "German")
-            self.assertEqual(coder.normalize_language("zh-CN"), "Chinese") # Test hyphen in fallback
+            self.assertEqual(
+                coder.normalize_language("zh-CN"), "Chinese"
+            )  # Test hyphen in fallback
             self.assertEqual(coder.normalize_language("ja"), "Japanese")
             self.assertEqual(
                 coder.normalize_language("unknown_code"), "unknown_code"