diff --git a/plugins/bc-mail/src/Model/Table/MailFieldsTable.php b/plugins/bc-mail/src/Model/Table/MailFieldsTable.php
index 228f6cff6d..1e10f7f573 100755
--- a/plugins/bc-mail/src/Model/Table/MailFieldsTable.php
+++ b/plugins/bc-mail/src/Model/Table/MailFieldsTable.php
@@ -159,6 +159,7 @@ public function validationDefault(Validator $validator): Validator
      * @return array source
      * @checked
      * @noTodo
+     * @unitTest
      */
     public function getControlSource($field = null)
     {
diff --git a/plugins/bc-mail/tests/TestCase/Model/Table/MailFieldsTableTest.php b/plugins/bc-mail/tests/TestCase/Model/Table/MailFieldsTableTest.php
index 4aa429f809..fb978b9401 100755
--- a/plugins/bc-mail/tests/TestCase/Model/Table/MailFieldsTableTest.php
+++ b/plugins/bc-mail/tests/TestCase/Model/Table/MailFieldsTableTest.php
@@ -163,7 +163,16 @@ public function test_validationDefaultDuplicate()
      */
     public function testGetControlSource()
     {
-        $this->markTestIncomplete('このテストは、まだ実装されていません。');
+        //$field = null
+        $rs = $this->MailFieldsTable->getControlSource();
+        $this->assertEquals('テキスト', $rs['type']['text']);
+        $this->assertEquals('Eメール形式チェック', $rs['valid_ex']['VALID_EMAIL']);
+        $this->assertEquals('半角変換', $rs['auto_convert']['CONVERT_HANKAKU']);
+
+        //$field != null
+        $rs = $this->MailFieldsTable->getControlSource('type');
+        $this->assertEquals('テキストエリア', $rs['textarea']);
+        $this->assertEquals('隠しフィールド', $rs['hidden']);
     }
 
     /**