diff --git a/script/test_definitions.sh b/script/test_definitions.sh
index ec03c89..7e26118 100644
--- a/script/test_definitions.sh
+++ b/script/test_definitions.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Copyright (c) 2019-2020, Arm Limited. All rights reserved.
 #