diff --git a/heat/tests/keystone/test_client.py b/heat/tests/keystone/test_client.py
index c2b1cfe5a8..5c552ac41e 100644
--- a/heat/tests/keystone/test_client.py
+++ b/heat/tests/keystone/test_client.py
@@ -365,3 +365,79 @@ class KeystoneClientPluginProjectTest(common.HeatTestCase):
                           self.sample_name)
         self._client.client.projects.list.assert_called_once_with(
             name=self.sample_name)
+
+
+class KeystoneClientPluginDomainTest(common.HeatTestCase):
+
+    sample_uuid = '477e8273-60a7-4c41-b683-fdb0bc7cd152'
+    sample_name = 'sample_domain'
+
+    def _get_mock_domain(self):
+        domain = mock.MagicMock()
+        domain.id = self.sample_uuid
+        domain.name = self.sample_name
+        return domain
+
+    def setUp(self):
+        super(KeystoneClientPluginDomainTest, self).setUp()
+        self._client = mock.MagicMock()
+
+    @mock.patch.object(client.KeystoneClientPlugin, 'client')
+    def test_get_domain_id(self, client_keystone):
+        self._client.client.domains.get.return_value = (self
+                                                        ._get_mock_domain())
+
+        client_keystone.return_value = self._client
+        client_plugin = client.KeystoneClientPlugin(
+            context=mock.MagicMock()
+        )
+
+        self.assertEqual(self.sample_uuid,
+                         client_plugin.get_domain_id(self.sample_uuid))
+        self._client.client.domains.get.assert_called_once_with(
+            self.sample_uuid)
+
+    @mock.patch.object(client.KeystoneClientPlugin, 'client')
+    def test_get_domain_id_with_name(self, client_keystone):
+        self._client.client.domains.get.side_effect = (keystone_exceptions
+                                                       .NotFound)
+        self._client.client.domains.list.return_value = [
+            self._get_mock_domain()
+        ]
+
+        client_keystone.return_value = self._client
+        client_plugin = client.KeystoneClientPlugin(
+            context=mock.MagicMock()
+        )
+
+        self.assertEqual(self.sample_uuid,
+                         client_plugin.get_domain_id(self.sample_name))
+        self.assertRaises(keystone_exceptions.NotFound,
+                          self._client.client.domains.get,
+                          self.sample_name)
+        self._client.client.domains.list.assert_called_once_with(
+            name=self.sample_name)
+
+    @mock.patch.object(client.KeystoneClientPlugin, 'client')
+    def test_get_domain_id_not_found(self, client_keystone):
+        self._client.client.domains.get.side_effect = (keystone_exceptions
+                                                       .NotFound)
+        self._client.client.domains.list.return_value = [
+        ]
+
+        client_keystone.return_value = self._client
+        client_plugin = client.KeystoneClientPlugin(
+            context=mock.MagicMock()
+        )
+
+        ex = self.assertRaises(exception.EntityNotFound,
+                               client_plugin.get_domain_id,
+                               self.sample_name)
+        msg = ("The KeystoneDomain (%(name)s) could not be found." %
+               {'name': self.sample_name})
+        self.assertEqual(msg, six.text_type(ex))
+        self.assertRaises(keystone_exceptions.NotFound,
+                          self._client.client.domains.get,
+                          self.sample_name)
+        self._client.client.domains.list.assert_called_once_with(
+            name=self.sample_name)