diff --git a/nova/tests/unit/virt/hyperv/test_block_device_manager.py b/nova/tests/unit/virt/hyperv/test_block_device_manager.py
index 939666e87b..4d9d6becd6 100644
--- a/nova/tests/unit/virt/hyperv/test_block_device_manager.py
+++ b/nova/tests/unit/virt/hyperv/test_block_device_manager.py
@@ -404,7 +404,8 @@ class BlockDeviceManagerTestCase(test_base.HyperVBaseTestCase):
         res = self._bdman._get_boot_order_gen1(fake_bdi)
         self.assertEqual(expected, res)
 
-    def test_get_boot_order_gen2(self):
+    @mock.patch('nova.virt.hyperv.volumeops.VolumeOps.get_disk_resource_path')
+    def test_get_boot_order_gen2(self, mock_get_disk_path):
         fake_root_disk = {'boot_index': 0,
                           'path': mock.sentinel.FAKE_ROOT_PATH}
         fake_eph1 = {'boot_index': 2,
@@ -418,8 +419,7 @@ class BlockDeviceManagerTestCase(test_base.HyperVBaseTestCase):
                                    fake_eph2],
                     'block_device_mapping': [fake_bdm]}
 
-        self._bdman._volops.get_mounted_disk_path_from_volume = (
-            mock.MagicMock(return_value=fake_bdm['connection_info']))
+        mock_get_disk_path.return_value = fake_bdm['connection_info']
 
         expected_res = [mock.sentinel.FAKE_ROOT_PATH,
                         mock.sentinel.FAKE_CONN_INFO,
diff --git a/nova/virt/hyperv/block_device_manager.py b/nova/virt/hyperv/block_device_manager.py
index 3f2ff7d3fe..21c003b0be 100644
--- a/nova/virt/hyperv/block_device_manager.py
+++ b/nova/virt/hyperv/block_device_manager.py
@@ -258,7 +258,7 @@ class BlockDeviceInfoManager(object):
         boot_order = []
         for dev in devices:
             if dev.get('connection_info'):
-                dev_path = self._volops.get_mounted_disk_path_from_volume(
+                dev_path = self._volops.get_disk_resource_path(
                     dev['connection_info'])
                 boot_order.append(dev_path)
             else: