diff --git a/metropolis/test/installer/main.go b/metropolis/test/installer/main.go
index 0a5e5aa..dafa288 100644
--- a/metropolis/test/installer/main.go
+++ b/metropolis/test/installer/main.go
@@ -20,6 +20,7 @@
 package main
 
 import (
+	"bytes"
 	"context"
 	"fmt"
 	"io"