diff --git a/tests/mscs-jvm-args.sh b/tests/mscs-jvm-args.sh
index 884e58e..6cbb381 100644
--- a/tests/mscs-jvm-args.sh
+++ b/tests/mscs-jvm-args.sh
@@ -1,3 +1,5 @@
+#!/bin/sh
+
 # start with clean slate
 [ -f $MSCS_DEFAULTS ] && rm $MSCS_DEFAULTS