diff --git a/test/per_router/conftest.py b/test/per_router/conftest.py
index 559167093813de008c2682b7d2cb065029f8cd92..9fc9ac4790cefd26df008c72cfc2a61539ca482e 100644
--- a/test/per_router/conftest.py
+++ b/test/per_router/conftest.py
@@ -54,6 +54,9 @@ class MockedJunosDevice(object):
     def open(self):
         pass
 
+    def close(self):
+        pass
+
 
 @pytest.fixture
 def netconf_doc(mocker, router, data_config):