diff --git a/backend-simulators/pim/pimsim-nn b/backend-simulators/pim/pimsim-nn
index d7f970a..deebd3a 160000
--- a/backend-simulators/pim/pimsim-nn
+++ b/backend-simulators/pim/pimsim-nn
@@ -1 +1 @@
-Subproject commit d7f970a0934bfbbf2ea913571e6dac88a7a22cc4
+Subproject commit deebd3a1968c57559797645538b1b1c18a967def
diff --git a/validation/raptor_validation/validate_one.py b/validation/raptor_validation/validate_one.py
index 3063a77..24a771b 100644
--- a/validation/raptor_validation/validate_one.py
+++ b/validation/raptor_validation/validate_one.py
@@ -254,7 +254,7 @@ def pimcomp_compatibility_errors(config_path, *, core_count, crossbar_count, cro
 def run_pimsim_nn(pimsim_nn_build_dir, pim_dir, config_path, reporter=None, timeout_sec=None):
     try:
         output = run_command(
-            [pimsim_nn_build_dir / "ChipTest", pim_dir, config_path, "false"],
+            [pimsim_nn_build_dir / "ChipTest", pim_dir, config_path, "--gui=false"],
             cwd=pimsim_nn_build_dir,
             reporter=reporter,
             timeout_sec=timeout_sec,