diff --git a/python/swiftest/swiftest/simulation_class.py b/python/swiftest/swiftest/simulation_class.py
index a3723553d..7afc72b76 100644
--- a/python/swiftest/swiftest/simulation_class.py
+++ b/python/swiftest/swiftest/simulation_class.py
@@ -789,6 +789,8 @@ def set_parameter(self, verbose: bool = True, **kwargs):
             "encounter_check_loops": "TRIANGULAR",
             "ephemeris_date": "MBCL",
             "restart": False,
+            "encounter_save" : "NONE",
+            "fragmentation_save" : "NONE"
         }
         param_file = kwargs.pop("param_file",None)