diff --git a/tests/ech_tests.sh b/tests/ech_tests.sh
index 1746f16511..b83a82d644 100755
--- a/tests/ech_tests.sh
+++ b/tests/ech_tests.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #***************************************************************************
 #                                  _   _ ____  _
 #  Project                     ___| | | |  _ \| |