diff --git a/tests/unit/ist.sh b/tests/unit/ist.sh
new file mode 100644
index 000000000..ab266f25a
--- /dev/null
+++ b/tests/unit/ist.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+check() {
+:
+}
+
+
+run() {
+	 gcc -Iinclude -Wall -W -fomit-frame-pointer -Os ${ROOTDIR}/tests/unit/ist.c -o ${ROOTDIR}/tests/unit/istOs
+	 ${ROOTDIR}/tests/unit/istOs > /dev/null
+	 gcc -Iinclude -Wall -W -fomit-frame-pointer -O1 ${ROOTDIR}/tests/unit/ist.c -o ${ROOTDIR}/tests/unit/istO1
+	 ${ROOTDIR}/tests/unit/istO1 > /dev/null
+	 gcc -Iinclude -Wall -W -fomit-frame-pointer -O2 ${ROOTDIR}/tests/unit/ist.c -o ${ROOTDIR}/tests/unit/istO2
+	 ${ROOTDIR}/tests/unit/istO2 > /dev/null
+	 gcc -Iinclude -Wall -W -fomit-frame-pointer -O3 ${ROOTDIR}/tests/unit/ist.c -o ${ROOTDIR}/tests/unit/istO3
+	 ${ROOTDIR}/tests/unit/istO3 > /dev/null
+
+	 rm ${ROOTDIR}/tests/unit/istOs
+	 rm ${ROOTDIR}/tests/unit/istO1
+	 rm ${ROOTDIR}/tests/unit/istO2
+	 rm ${ROOTDIR}/tests/unit/istO3
+}
+
+case "$1" in
+	"check")
+		check
+	;;
+	"run")
+		run
+	;;
+esac