diff --git a/python/swiftest/swiftest/simulation_class.py b/python/swiftest/swiftest/simulation_class.py
index cd556b555..cd64d3bc6 100644
--- a/python/swiftest/swiftest/simulation_class.py
+++ b/python/swiftest/swiftest/simulation_class.py
@@ -49,9 +49,6 @@ def __init__(self, codename="Swiftest", param_file="param.in", readbin=False, ve
             'CHK_QMIN_COORD': "HELIO",
             'CHK_QMIN_RANGE': "-1.0 -1.0",
             'ENC_OUT': "",
-            'MU2KG': constants.MSun,
-            'TU2S': constants.JD2S,
-            'DU2M': constants.AU2M,
             'EXTRA_FORCE': "NO",
             'DISCARD_OUT': "",
             'PARTICLE_OUT' : "",