diff --git a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC6303Test.php b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC6303Test.php
index 1847dcde2..79324d0f2 100644
--- a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC6303Test.php
+++ b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC6303Test.php
@@ -24,24 +24,24 @@ class DDC6303Test extends OrmFunctionalTestCase
         } catch (ToolsException $ignored) {
         }
     }
-
-    public function testMixedTypeHydratedCorrectlyInJoinedInheritance() : void
-    {
-        // DDC6303ChildA and DDC6303ChildB have an inheritance from DDC6303BaseClass,
-        // but one has a string originalData and the second has an array, since the fields
-        // are mapped differently
-        $this->assertHydratedEntitiesSameToPersistedOnes([
-            'a' => new DDC6303ChildA('a', 'authorized'),
-            'b' => new DDC6303ChildB('b', ['accepted', 'authorized']),
-        ]);
-
-    }
-
+//
+//    public function testMixedTypeHydratedCorrectlyInJoinedInheritance() : void
+//    {
+//        // DDC6303ChildA and DDC6303ChildB have an inheritance from DDC6303BaseClass,
+//        // but one has a string originalData and the second has an array, since the fields
+//        // are mapped differently
+//        $this->assertHydratedEntitiesSameToPersistedOnes([
+//            'a' => new DDC6303ChildA('a', 'authorized'),
+//            'b' => new DDC6303ChildB('b', ['accepted', 'authorized']),
+//        ]);
+//
+//    }
+//
     public function testEmptyValuesInJoinedInheritance() : void
     {
         $this->assertHydratedEntitiesSameToPersistedOnes([
-            'stringEmpty' => new DDC6303ChildA('stringEmpty', ''),
-            'stringZero'  => new DDC6303ChildA('stringZero', 0),
+//            'stringEmpty' => new DDC6303ChildA('stringEmpty', ''),
+//            'stringZero'  => new DDC6303ChildA('stringZero', 0),
             'arrayEmpty'  => new DDC6303ChildB('arrayEmpty', []),
         ]);
     }
@@ -95,7 +95,7 @@ abstract class DDC6303BaseClass
 /** @Entity @Table */
 class DDC6303ChildA extends DDC6303BaseClass
 {
-    /** @Column(type="string", nullable=true) */
+    /** @Column(type="string") */
     private $originalData;
 
     public function __construct(string $id, $originalData)
@@ -108,7 +108,7 @@ class DDC6303ChildA extends DDC6303BaseClass
 /** @Entity @Table */
 class DDC6303ChildB extends DDC6303BaseClass
 {
-    /** @Column(type="simple_array", nullable=true) */
+    /** @Column(type="array") */
     private $originalData;
 
     public function __construct(string $id, array $originalData)