diff --git a/test/tiff-test.sh b/test/tiff-test.sh
index 82e6c6db..2be7b5e3 100644
--- a/test/tiff-test.sh
+++ b/test/tiff-test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # TIFF parser test driver
 
 if [ "${BASH_VERSION:0:1}" -lt "4" ]; then