diff --git a/sh/tests/plus_test.sh b/sh/tests/plus_test.sh
index c7571923..92420e32 100644
--- a/sh/tests/plus_test.sh
+++ b/sh/tests/plus_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 IFS='
diff --git a/sh/tests/solutions/plus.sh b/sh/tests/solutions/plus.sh
index a526f7a7..12214525 100644
--- a/sh/tests/solutions/plus.sh
+++ b/sh/tests/solutions/plus.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Add the two numbers
 result=$(expr $1 + $2)