diff --git a/tests/test.py b/tests/test.py
index d68db1e..679811c 100644
--- a/tests/test.py
+++ b/tests/test.py
@@ -149,6 +149,6 @@ def test_ar():
     )
 
     eq_(
-        tokenize('\ufefb', 'ar'),
-        ['\u0644\u0627']
+        tokenize('\ufefb', 'ar'),  # An Arabic ligature...
+        ['\u0644\u0627']  # ...that is affected by NFKC normalization
     )