diff --git a/trytond/test/__init__.py b/trytond/test/__init__.py
index 7fa8d76eb6..0e3046b27f 100644
--- a/trytond/test/__init__.py
+++ b/trytond/test/__init__.py
@@ -10,6 +10,7 @@ from .trigger import *
 from .access import *
 from .wizard import *
 from .workflow import *
+from .copy import *
 
 
 def register():
@@ -121,6 +122,10 @@ def register():
         TestAccess,
         TestWizardStart,
         WorkflowedModel,
+        CopyOne2Many,
+        CopyOne2ManyTarget,
+        CopyOne2ManyReference,
+        CopyOne2ManyReferenceTarget,
         module='test', type_='model')
     Pool.register(
         TestWizard,
diff --git a/trytond/test/copy.py b/trytond/test/copy.py
new file mode 100644
index 0000000000..c2eb91648d
--- /dev/null
+++ b/trytond/test/copy.py
@@ -0,0 +1,42 @@
+#This file is part of Tryton.  The COPYRIGHT file at the top level of
+#this repository contains the full copyright notices and license terms.
+"Test for copy"
+from trytond.model import ModelSQL, fields
+
+__all__ = [
+    'CopyOne2Many', 'CopyOne2ManyTarget',
+    'CopyOne2ManyReference', 'CopyOne2ManyReferenceTarget',
+    ]
+
+
+class CopyOne2Many(ModelSQL):
+    "Copy One2Many"
+    __name__ = 'test.copy.one2many'
+    name = fields.Char('Name')
+    one2many = fields.One2Many('test.copy.one2many.target', 'one2many',
+        'One2Many')
+
+
+class CopyOne2ManyTarget(ModelSQL):
+    "Copy One2Many Target"
+    __name__ = 'test.copy.one2many.target'
+    name = fields.Char('Name')
+    one2many = fields.Many2One('test.copy.one2many', 'One2Many')
+
+
+class CopyOne2ManyReference(ModelSQL):
+    "Copy One2Many Reference"
+    __name__ = 'test.copy.one2many_reference'
+    name = fields.Char('Name')
+    one2many = fields.One2Many('test.copy.one2many_reference.target',
+        'one2many', 'One2Many')
+
+
+class CopyOne2ManyReferenceTarget(ModelSQL):
+    "Copy One2Many ReferenceTarget"
+    __name__ = 'test.copy.one2many_reference.target'
+    name = fields.Char('Name')
+    one2many = fields.Reference('One2Many', [
+            (None, ''),
+            ('test.copy.one2many_reference', 'One2Many'),
+            ])
diff --git a/trytond/tests/test_copy.py b/trytond/tests/test_copy.py
new file mode 100644
index 0000000000..e6cc8e94f4
--- /dev/null
+++ b/trytond/tests/test_copy.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#This file is part of Tryton.  The COPYRIGHT file at the top level of
+#this repository contains the full copyright notices and license terms.
+import unittest
+from trytond.tests.test_tryton import POOL, DB_NAME, USER, CONTEXT, \
+        install_module
+from trytond.transaction import Transaction
+
+
+class CopyTestCase(unittest.TestCase):
+    '''
+    Test copy.
+    '''
+
+    def setUp(self):
+        install_module('test')
+        self.one2many = POOL.get('test.copy.one2many')
+        self.one2many_target = POOL.get('test.copy.one2many.target')
+        self.one2many_reference = POOL.get('test.copy.one2many_reference')
+        self.one2many_reference_target = \
+            POOL.get('test.copy.one2many_reference.target')
+
+    def test0130one2many(self):
+        '''
+        Test one2many.
+        '''
+        with Transaction().start(DB_NAME, USER,
+                context=CONTEXT) as transaction:
+            for One2many, Target in (
+                    (self.one2many, self.one2many_target),
+                    (self.one2many_reference, self.one2many_reference_target),
+                    ):
+                one2many = One2many(name='Test')
+                one2many.one2many = [
+                    Target(name='Target 1'),
+                    Target(name='Target 2'),
+                    ]
+                one2many.save()
+
+                one2many_copy, = One2many.copy([one2many])
+
+                self.assertNotEqual(one2many, one2many_copy)
+                self.assertEqual(len(one2many.one2many),
+                    len(one2many_copy.one2many))
+                self.assertNotEqual(one2many.one2many, one2many_copy.one2many)
+                self.assertEqual([x.name for x in one2many.one2many],
+                    [x.name for x in one2many_copy.one2many])
+
+            transaction.cursor.rollback()
+
+
+def suite():
+    return unittest.TestLoader().loadTestsFromTestCase(CopyTestCase)
+
+if __name__ == '__main__':
+    suite = suite()
+    unittest.TextTestRunner(verbosity=2).run(suite)
diff --git a/trytond/tests/test_tryton.py b/trytond/tests/test_tryton.py
index ae19edb294..ad7d71fb7e 100644
--- a/trytond/tests/test_tryton.py
+++ b/trytond/tests/test_tryton.py
@@ -261,6 +261,8 @@ def all_suite():
     suite_.addTests(test_modelsql.suite())
     import trytond.tests.test_cache as test_cache
     suite_.addTests(test_cache.suite())
+    import trytond.tests.test_copy as test_copy
+    suite_.addTests(test_copy.suite())
     return suite_