diff --git a/tests/int-overflow b/tests/int-overflow
index baf2eefcde7f1d36641d8a0dd108ad27e1ee211f..36e55368adad675d50e2bb485b70a5cf4cdcd1bb 100755
--- a/tests/int-overflow
+++ b/tests/int-overflow
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 # Ensure that an invalid domain ID isn't interpreted as a valid one.
 # Before, an ID of 2^32+2 would be treated just like an ID of 2.