diff --git a/dev/tpv2/run.sh b/dev/tpv2/run.sh
index 26f01eaf50..7827151e7e 100755
--- a/dev/tpv2/run.sh
+++ b/dev/tpv2/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
 #  limitations under the License.
 #
 
-set -o errexit
+set -o errexit -o nounset
 
 cd "$TC/experimental/traffic-portal"
 
diff --git a/dev/traffic_portal/run.sh b/dev/traffic_portal/run.sh
index 3874c71d76..8608e3eeca 100755
--- a/dev/traffic_portal/run.sh
+++ b/dev/traffic_portal/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.