diff --git a/src/Qiniu/Auth.php b/src/Qiniu/Auth.php
index c8554e21..d794e936 100644
--- a/src/Qiniu/Auth.php
+++ b/src/Qiniu/Auth.php
@@ -14,19 +14,19 @@ public function __construct($accessKey, $secretKey)
         $this->secretKey = $secretKey;
     }
 
-    public function token($data)
+    public function sign($data)
     {
         $hmac = hash_hmac('sha1', $data, $this->secretKey, true);
         return $this->accessKey . ':' . \Qiniu\base64_urlSafeEncode($hmac);
     }
 
-    public function tokenWithData($data)
+    public function signWithData($data)
     {
         $data = \Qiniu\base64_urlSafeEncode($data);
-        return $this->token($data) . ':' . $data;
+        return $this->sign($data) . ':' . $data;
     }
 
-    public function tokenOfRequest($urlString, $body, $contentType = null)
+    public function signRequest($urlString, $body, $contentType = null)
     {
         $url = parse_url($urlString);
         $data = '';
@@ -42,12 +42,12 @@ public function tokenOfRequest($urlString, $body, $contentType = null)
             ($contentType == 'application/x-www-form-urlencoded') ||  $contentType == 'application/json') {
             $data .= $body;
         }
-        return $this->token($data);
+        return $this->sign($data);
     }
 
     public function verifyCallback($contentType, $originAuthorization, $url, $body)
     {
-        $authorization = 'QBox ' . $this->tokenOfRequest($url, $body, $contentType);
+        $authorization = 'QBox ' . $this->signRequest($url, $body, $contentType);
         return $originAuthorization === $authorization;
     }
 
@@ -63,7 +63,7 @@ public function privateDownloadUrl($baseUrl, $expires = 3600)
         }
         $baseUrl .= $deadline;
 
-        $token = $this->token($baseUrl);
+        $token = $this->sign($baseUrl);
         return "$baseUrl&token=$token";
     }
 
@@ -84,7 +84,7 @@ public function uploadToken(
         $args['scope'] = $scope;
         $args['deadline'] = $deadline;
         $b = json_encode($args);
-        return $this->tokenWithData($b);
+        return $this->signWithData($b);
     }
 
     private static $policyFields = array(
@@ -132,7 +132,7 @@ private static function copyPolicy($policy, $originPolicy, $strictPolicy)
 
     public function authorization($url, $body = null, $contentType = null)
     {
-        $authorization = 'QBox ' . $this->tokenOfRequest($url, $body, $contentType);
+        $authorization = 'QBox ' . $this->signRequest($url, $body, $contentType);
         return array('Authorization' => $authorization);
     }
 }
diff --git a/tests/Qiniu/Tests/AuthTest.php b/tests/Qiniu/Tests/AuthTest.php
index 7a56df27..7a157166 100644
--- a/tests/Qiniu/Tests/AuthTest.php
+++ b/tests/Qiniu/Tests/AuthTest.php
@@ -22,27 +22,27 @@ function time()
     class AuthTest extends \PHPUnit_Framework_TestCase
     {
 
-        public function testToken()
+        public function testSign()
         {
             global $dummyAuth;
-            $token = $dummyAuth->token('test');
+            $token = $dummyAuth->sign('test');
             $this->assertEquals('abcdefghklmnopq:mSNBTR7uS2crJsyFr2Amwv1LaYg=', $token);
         }
 
-        public function testTokenWithData()
+        public function testSignWithData()
         {
             global $dummyAuth;
-            $token = $dummyAuth->tokenWithData('test');
+            $token = $dummyAuth->signWithData('test');
             $this->assertEquals('abcdefghklmnopq:-jP8eEV9v48MkYiBGs81aDxl60E=:dGVzdA==', $token);
         }
 
-        public function testTokenOfRequest()
+        public function testSignRequest()
         {
             global $dummyAuth;
-            $token = $dummyAuth->tokenOfRequest('http://www.qiniu.com?go=1', 'test', '');
+            $token = $dummyAuth->signRequest('http://www.qiniu.com?go=1', 'test', '');
             $this->assertEquals('abcdefghklmnopq:cFyRVoWrE3IugPIMP5YJFTO-O-Y=', $token);
             $ctype = 'application/x-www-form-urlencoded';
-            $token = $dummyAuth->tokenOfRequest('http://www.qiniu.com?go=1', 'test', $ctype);
+            $token = $dummyAuth->signRequest('http://www.qiniu.com?go=1', 'test', $ctype);
             $this->assertEquals($token, 'abcdefghklmnopq:svWRNcacOE-YMsc70nuIYdaa1e4=');
         }
 
diff --git a/tests/Qiniu/Tests/HttpTest.php b/tests/Qiniu/Tests/HttpTest.php
index ebfe6cb0..dee26af9 100644
--- a/tests/Qiniu/Tests/HttpTest.php
+++ b/tests/Qiniu/Tests/HttpTest.php
@@ -16,7 +16,7 @@ public function testGet()
     public function testGetQiniu()
     {
         $response = Client::get('up.qiniu.com');
-        $this->assertEquals($response->statusCode, 405);
+        $this->assertEquals(405, $response->statusCode);
         $this->assertNotNull($response->body);
         $this->assertNotNull($response->xReqId());
         $this->assertNotNull($response->xLog());