diff --git a/registry/storage/driver/oss/oss.go b/registry/storage/driver/oss/oss.go
index cbda6d16..108ad475 100644
--- a/registry/storage/driver/oss/oss.go
+++ b/registry/storage/driver/oss/oss.go
@@ -14,7 +14,6 @@ package oss
 import (
 	"bytes"
 	"fmt"
-	"github.com/docker/distribution/context"
 	"io"
 	"io/ioutil"
 	"net/http"
@@ -24,6 +23,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/docker/distribution/context"
+
 	"github.com/Sirupsen/logrus"
 	"github.com/denverdino/aliyungo/oss"
 	storagedriver "github.com/docker/distribution/registry/storage/driver"
diff --git a/registry/storage/driver/oss/oss_test.go b/registry/storage/driver/oss/oss_test.go
index 56ec3208..fbae5d9c 100644
--- a/registry/storage/driver/oss/oss_test.go
+++ b/registry/storage/driver/oss/oss_test.go
@@ -3,11 +3,12 @@
 package oss
 
 import (
+	"io/ioutil"
+
 	alioss "github.com/denverdino/aliyungo/oss"
 	"github.com/docker/distribution/context"
 	storagedriver "github.com/docker/distribution/registry/storage/driver"
 	"github.com/docker/distribution/registry/storage/driver/testsuites"
-	"io/ioutil"
 	//"log"
 	"os"
 	"strconv"