diff --git a/ChangeLog b/ChangeLog
index 2473b156f5..2b70452d3f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -54,7 +54,7 @@ Sun Dec 27 11:50:53 2015  Kuniaki IGARASHI  <igaiga@gmail.com>
 Sun Dec 27 11:47:46 2015  Kuniaki IGARASHI  <igaiga@gmail.com>
 
 	* test/ruby/test_string.rb (test_insert): Add test for
-	  String#test_insert.  The test cases are written in string.c
+	  String#insert.  The test cases are written in string.c
 	  comments as a reference.  [Fix GH-1173]
 
 Sun Dec 27 11:03:33 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>