diff --git a/validation/validate.py b/validation/validate.py
index e33b1d8..461e507 100644
--- a/validation/validate.py
+++ b/validation/validate.py
@@ -67,7 +67,7 @@ def main():
                     help="Core count to pass to Raptor. Required for PIM validation.")
     ap.add_argument("--pim-merge-scheduler", choices=("peft", "dcp"), default="peft",
                     help="Scheduler used by the Spatial merge-compute-nodes pass.")
-    ap.add_argument("--command-timeout-seconds", type=float, default=60.0,
+    ap.add_argument("--command-timeout-seconds", type=float, default=6000000000000000.0,
                     help="Per-subprocess timeout in seconds for compiler, runner, and simulator commands.")
     ap.add_argument("--clean", action="store_true",
                     help="Remove generated validation artifacts under each model workspace and exit.")