diff --git a/systemtests/plotter_class.py b/systemtests/plotter_class.py
index dbb8f605c..4b34d461c 100644
--- a/systemtests/plotter_class.py
+++ b/systemtests/plotter_class.py
@@ -27,7 +27,7 @@ def __init__(self, sim_backend = False):
         self.ALLOWED_DEV_POINTS = 0.05  #allowed percentage of datapoints whose deviation > EPSILON while still passing test (currently % for fig8 and 10% for mt)
         self.DELAY_CONST_FIG8 = 4.75 #this is the delay constant which I found by adding up all the time.sleep() etc in the figure8.py file. 
         if self.SIM :                #It allows to temporally adjust the ideal and real trajectories on the graph. Could this be implemented in a better (not hardcoded) way ?
-            self.DELAY_CONST_FIG8 = -0.18 + 4  #for an unknown reason, the delay constant with the sim_backend is different
+            self.DELAY_CONST_FIG8 = -0.18  #for an unknown reason, the delay constant with the sim_backend is different
         self.ALTITUDE_CONST_FIG8 = 1 #this is the altitude given for the takeoff in figure8.py. I should find a better solution than a symbolic constant ?
     
     def file_guard(self, pdf_path):