diff --git a/python/swiftest/swiftest/simulation_class.py b/python/swiftest/swiftest/simulation_class.py
index 670b72a60..30719a7db 100644
--- a/python/swiftest/swiftest/simulation_class.py
+++ b/python/swiftest/swiftest/simulation_class.py
@@ -45,9 +45,6 @@ def __init__(self, codename="Swiftest", param_file=""):
             'TIDES': "NO",
             'ENERGY': "NO",
             'GR': "NO",
-            'YARKOVSKY': "NO",
-            'YORP': "NO",
-            'MTINY' : "0.0"
         }
         self.codename = codename
         if param_file != "" :