diff --git a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC6303Test.php b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC6303Test.php
index <HASH>..<HASH> 100644
--- a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC6303Test.php
+++ b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC6303Test.php
@@ -28,6 +28,7 @@ class DDC6303Test extends \Doctrine\Tests\OrmFunctionalTestCase
         $contractA->originalData = $contractAData;
 
         $contractB = new DDC6303ContractB();
+        //contractA and contractB have an inheritance from Contract, but one has a string originalData and the second has an array
         $contractBData = ['accepted', 'authorized'];
         $contractB->originalData = $contractBData;
 
@@ -61,7 +62,6 @@ class DDC6303Test extends \Doctrine\Tests\OrmFunctionalTestCase
     {
         $contractStringEmptyData = '';
         $contractStringZeroData = 0;
-
         $contractArrayEmptyData = [];        
 
         $contractStringEmpty = new DDC6303ContractA();
@@ -151,4 +151,4 @@ class DDC6303ContractB extends DDC6303Contract
      * @var array
      */
     public $originalData;
-}
\ No newline at end of file
+}
clarified what's the problem in a comment