diff --git a/tests/test_ifs_sim.py b/tests/test_ifs_sim.py
index 9e168e149f179fc60aff8f9f84f7e096c00d26b2..839cd6ca1ebc68fa19356d5d35987ce3821ae7f4 100644
--- a/tests/test_ifs_sim.py
+++ b/tests/test_ifs_sim.py
@@ -13,10 +13,11 @@ import unittest
 import os
 from csst_ifs_sim import csst_ifs_sim
 
-
-sys.path.append('IFS_git/csst_ifs_sim/csst_ifs_sim')
 import sys
 
+### sys.path.append('IFS_git/csst_ifs_sim/csst_ifs_sim')
+
+
 class TestDemoFunction(unittest.TestCase):
     def test_ifs_sim_1(self):
         """
@@ -240,4 +241,4 @@ class TestDemoFunction(unittest.TestCase):
             "case 6:  sim passes.",
         )
             
-         
\ No newline at end of file
+