diff --git a/tools/pretty_tox_serial.sh b/tools/pretty_tox_serial.sh
index 45f05bd..42ce760 100755
--- a/tools/pretty_tox_serial.sh
+++ b/tools/pretty_tox_serial.sh
@@ -1,4 +1,6 @@
-#!/bin/sh
+#!/usr/bin/env bash
+
+set -o pipefail
 
 TESTRARGS=$@