diff --git a/build/build.sh b/build/build.sh
index 0aec5c8fc..8e5a939c4 100755
--- a/build/build.sh
+++ b/build/build.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Copyright 2016 The Kubernetes Authors.
 #
diff --git a/build/test.sh b/build/test.sh
index 72487a32e..42a302fe0 100755
--- a/build/test.sh
+++ b/build/test.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Copyright 2016 The Kubernetes Authors.
 #