diff --git a/arc/main_test.py b/arc/main_test.py
index 6e39d9e227..c40adaa3a1 100644
--- a/arc/main_test.py
+++ b/arc/main_test.py
@@ -92,6 +92,7 @@ def test_as_dict(self):
                          'ess_settings': {'cfour': ['local'],
                                           'gaussian': ['local', 'server2'],
                                           'gcn': ['local'],
+                                          'mockter': ['local'],
                                           'molpro': ['local', 'server2'],
                                           'onedmin': ['server1'],
                                           'openbabel': ['local'],