diff --git a/tests/Unit/Utilities/FormatterTest.php b/tests/Unit/Utilities/FormatterTest.php
index 1708e4b..46718fa 100644
--- a/tests/Unit/Utilities/FormatterTest.php
+++ b/tests/Unit/Utilities/FormatterTest.php
@@ -93,7 +93,7 @@ class FormatterTest extends TestCase
             '組み文字1' => ['13㎝', '13cm'],
             '組み文字2' => ['13㌢㍍', '13センチメートル'],
             'Script' => ['ℬ𝒶𝒷𝓊𝓂𝒾', 'babumi'],
-            '分割された濁点' => ['オカス゛', 'オカズ'],
+            'NFD' => ['オカズ', 'オカズ'],
         ];
     }
 }