diff --git a/python/swiftest/swiftest/simulation_class.py b/python/swiftest/swiftest/simulation_class.py
index 2f6f13cd6..c9f125173 100644
--- a/python/swiftest/swiftest/simulation_class.py
+++ b/python/swiftest/swiftest/simulation_class.py
@@ -405,7 +405,7 @@ def _run_swiftest_driver(self):
 
         # Get current environment variables
         env = os.environ.copy()
-        cmd = f"{env['SHELL']} -l {self.driver_script}"
+        cmd = f"{env['SHELL']} {self.driver_script}"
         
 
         def _type_scrub(output_data):