diff --git a/smartsim/_core/_cli/validate.py b/smartsim/_core/_cli/validate.py
index 9681c9087..ea9664370 100644
--- a/smartsim/_core/_cli/validate.py
+++ b/smartsim/_core/_cli/validate.py
@@ -70,7 +70,7 @@ def __exit__(
             self._finalizer.detach()  # type: ignore[attr-defined]
 
 
-def execute(args: argparse.Namespace) -> int:
+def execute(args: argparse.Namespace, _unparsed_args: argparse.Namespace) -> int:
     """Validate the SmartSim installation works as expected given a
     simple experiment
     """