diff --git a/registry/storage/driver/s3-aws/s3_test.go b/registry/storage/driver/s3-aws/s3_test.go
index 7e987a2f..f0b257ca 100644
--- a/registry/storage/driver/s3-aws/s3_test.go
+++ b/registry/storage/driver/s3-aws/s3_test.go
@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"math/rand"
 	"os"
+	"reflect"
 	"strconv"
 	"strings"
 	"testing"