diff --git a/tests/compute/docker/test_docker_vm.py b/tests/compute/docker/test_docker_vm.py
index aeb7dc78..f5f8f7e0 100644
--- a/tests/compute/docker/test_docker_vm.py
+++ b/tests/compute/docker/test_docker_vm.py
@@ -769,6 +769,8 @@ def test_adapter_add_nio_binding(vm, loop):
 
 
 def test_adapter_udpate_nio_binding(vm, loop):
+    vm.ubridge = MagicMock()
+    vm.ubridge.is_running.return_value = True
     vm._ubridge_apply_filters = AsyncioMagicMock()
     vm._bridges = set(('bridge0', ))
     nio = {"type": "nio_udp",