diff --git a/product/ERP5/tests/testERP5Base.py b/product/ERP5/tests/testERP5Base.py
index 3bef9056259a7c4360ac77f0830575f7ac09148f..b598ab1ddb024ffd303fc83b796e7a3d60cfe973 100644
--- a/product/ERP5/tests/testERP5Base.py
+++ b/product/ERP5/tests/testERP5Base.py
@@ -722,7 +722,7 @@ class TestERP5Base(ERP5TypeTestCase):
                        new_organisation.getRelativeUrl() )
     self.assertEquals( new_career_step.getSubordinationTitle(),
                        new_organisation_title )
-    
+
   def stepCheckChangePersonAddress(self, sequence=None, **kw) :
     """
     We must make sure that if we change the address of a person,
@@ -780,6 +780,27 @@ class TestERP5Base(ERP5TypeTestCase):
     self.assertEquals(organisation.getDefaultAddressCity(),'Lille')
     self.assertEquals(organisation.getDefaultAddressZipCode(), '59000')
 
+    # if the address of the person is the same of the organisation
+    # there is no reason to create a subobject (default_address)
+    person.manage_delObjects(['default_address'])
+    person.edit(career_subordination_value=organisation)
+    self.assertTrue('default_address' not in person.objectIds())
+    self.assertEquals(person.getDefaultAddress(),
+        organisation.getDefaultAddress())
+    self.assertEquals(person.getDefaultAddressCity(),
+        organisation.getDefaultAddressCity())
+    self.assertEquals(person.getDefaultAddressZipCode(),
+        organisation.getDefaultAddressZipCode())
+    # if the address of the person is different then the subobject
+    # (default_address) must be created.
+    person.edit(default_address_city='La Garnache')
+    self.assertTrue('default_address' in person.objectIds())
+    self.assertNotEquals(person.getDefaultAddressCity(),
+         organisation.getDefaultAddressCity())
+
+
+
+
   ##################################
   ##  Tests
   ##################################
@@ -1405,7 +1426,6 @@ class TestERP5Base(ERP5TypeTestCase):
                                      translated_portal_type='Personne')])
     transaction.abort()
 
-
 def test_suite():
   suite = unittest.TestSuite()
   suite.addTest(unittest.makeSuite(TestERP5Base))