diff --git a/ObservationSim/SimSteps.py b/ObservationSim/SimSteps.py
index ecb484e6494d6df249246fddea9d7b611844fa59..5300c5277d95c258bcb007657cafdb31a4b37673 100644
--- a/ObservationSim/SimSteps.py
+++ b/ObservationSim/SimSteps.py
@@ -121,7 +121,7 @@ class SimSteps:
             else:
                 chip, filt, tel, pointing = self.add_sky_flat_calibration(chip, filt, tel, pointing, catalog, obs_param)
 
-    chip, filt, tel, pointing = self.add_sky_background_sci(chip, filt, tel, pointing, catalog, obs_param)
+    # chip, filt, tel, pointing = self.add_sky_background_sci(chip, filt, tel, pointing, catalog, obs_param)
         
         return chip, filt, tel, pointing