diff --git a/tests/bonsai/npc.sh b/tests/bonsai/npc.sh
new file mode 100755
index 0000000..aa66b4f
--- /dev/null
+++ b/tests/bonsai/npc.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+# Copyright (c) 2024 DTB <trinity@trinity.moe>
+# SPDX-License-Identifier: FSFAP
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice and this
+# notice are preserved.  This file is offered as-is, without any warranty.
+
+. tests/bonsai/test_env
+
+! npc -h
+
+# arg parsing
+npc -e </dev/null
+npc -t </dev/null
+npc -et </dev/null
+! npc -et 5 </dev/null
+
+#i=0; while "$BIN"/intcmp -l $i 178; do
+#	printf '\\%s\\n' "$i" \
+#		| xargs -I fmt printf fmt
+#
+#	# simulate octal
+#	i="$(printf '1 + %s\n' "$i" | bc)"
+#	printf '%s\n' "$i" \
+#			| tail -c 1 \
+#			| xargs "$BIN"/intcmp -e 8 \
+#		&& i="$(printf '2 + %s\n' "$i" | bc)"
+#	printf '%s\n' "$i" \
+#			| tail -c 2 \
+#			| dd count=1 bs=1 2>/dev/null \
+#			| xargs "$BIN"/intcmp -e 8 \
+#		&& i="$(printf '20 + %s\n' "$i" | bc)"
+#done