diff --git a/force_bdss/tests/probe_classes/mco.py b/force_bdss/tests/probe_classes/mco.py
index 58fdd1331a615d64cd48d2d2906b7b8fdf0a7f89..e739574c0422f1442d6b5c3e6b53521f458e3860 100644
--- a/force_bdss/tests/probe_classes/mco.py
+++ b/force_bdss/tests/probe_classes/mco.py
@@ -1,4 +1,4 @@
-from traits.api import Str, Type, Bool, Int, Function, List
+from traits.api import Str, Type, Bool, Int, Function
 
 from force_bdss.ids import mco_parameter_id, factory_id
 from force_bdss.core.data_value import DataValue