diff --git a/go/reg-test/run b/go/reg-test/run
index 938d5b2f8..b46b76983 100755
--- a/go/reg-test/run
+++ b/go/reg-test/run
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 set -uo pipefail