diff --git a/tests/test_main.py b/tests/test_main.py
index 776c1f9e..3eeab6d4 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -68,6 +68,7 @@
               }
 
 rmg_minimal = {'memory': None,
+               'cpus': None,
                'rmg_execution_type': None,
                'database': {'kinetics_depositories': 'default',
                             'kinetics_estimator': 'rate rules',