diff --git a/comment_test.go b/comment_test.go
index 25ec9df..1a7d5f2 100644
--- a/comment_test.go
+++ b/comment_test.go
@@ -3,8 +3,8 @@ package kintone
 import "testing"
 
 func TestDecodeRecordComments(t *testing.T) {
-	j := []byte(`
-{"comments":[{"id":"2","text":"ほげほげ","createdAt":"2016-11-07T19:53:32Z","creator":{"code":"xxx.tat","name":"さんぷる"},"mentions":[]},{"id":"1","text":"ふがふが","createdAt":"2016-11-07T19:53:27Z","creator":{"code":"xxx.tat","name":"さんぷる"},"mentions":[]}],"older":false,"newer":false}
+    j := []byte(`
+{"comments":[{"id":"2","text":"ほげほげ","createdAt":"2016-11-07T19:53:32Z","creator":{"code":"xxx.tat","name":"さんぷる"},"mentions":[{"code":"wolf","type":"USER"}]},{"id":"1","text":"ふがふが","createdAt":"2016-11-07T19:53:27Z","creator":{"code":"xxx.tat","name":"さんぷる"},"mentions":[]}],"older":false,"newer":false}
 `)
 
 	rec, err := DecodeRecordComments(j)
@@ -20,4 +20,14 @@ func TestDecodeRecordComments(t *testing.T) {
 	if rec[0].Text != "ほげほげ" {
 		t.Errorf("comment text mismatch. actual %v", rec[0].Text)
 	}
+
+	if rec[0].CreatedAt != "2016-11-07T19:53:32Z" {
+		t.Errorf("comment createdat mismatch. actual %v", rec[0].CreatedAt)
+	}
+	if rec[0].Creator.Code != "xxx.tat" {
+		t.Errorf("comment creator mismatch. actual %v", rec[0].Creator.Code)
+	}
+	if rec[0].Mentions[0].Code != "wolf" {
+		t.Errorf("comment mention-code mismatch. actual %v", rec[0].Mentions[0].Code)
+	}	
 }