diff --git a/testsuite/tests/ip/route/add_default_route.t b/testsuite/tests/ip/route/add_default_route.t
index 0b566f1f..569ba1f8 100755
--- a/testsuite/tests/ip/route/add_default_route.t
+++ b/testsuite/tests/ip/route/add_default_route.t
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 . lib/generic.sh