diff --git a/tests/Relation/OneToOneTestCase.php b/tests/Relation/OneToOneTestCase.php
index <HASH>..<HASH> 100644
--- a/tests/Relation/OneToOneTestCase.php
+++ b/tests/Relation/OneToOneTestCase.php
@@ -69,4 +69,18 @@ class Doctrine_Relation_OneToOne_TestCase extends Doctrine_UnitTestCase
         $this->assertEqual($ref->name, 'ref 1');

         $this->assertEqual($ref->createdBy->name, 'ref 2');

     }

+

+    public function testUnsetRelation()

+    {

+        $user = new User();

+        $user->name = "test";

+        $email = new Email();

+        $email->address = "test@test.com";

+        $user->Email = $email;

+        $user->save();

+        $this->assertTrue($user->Email instanceOf Email);

+        $user->Email = Email::getNullObject();

+        $user->save();

+        $this->assertTrue($user->Email instanceOf Doctrine_Null);

+    }

 }
added test to ensure that a link to a hasOne resource can be unset