diff --git a/src/Composer/Config.php b/src/Composer/Config.php
index 2888b8d29..fcf00c2f2 100644
--- a/src/Composer/Config.php
+++ b/src/Composer/Config.php
@@ -79,7 +79,9 @@ class Config
     private $config;
     private $baseDir;
     private $repositories;
+    /** @var ConfigSourceInterface */
     private $configSource;
+    /** @var ConfigSourceInterface */
     private $authConfigSource;
     private $useEnvironment;
     private $warnedHosts = array();
diff --git a/src/Composer/Util/Bitbucket.php b/src/Composer/Util/Bitbucket.php
index f8b460103..152fe5fa0 100644
--- a/src/Composer/Util/Bitbucket.php
+++ b/src/Composer/Util/Bitbucket.php
@@ -27,6 +27,7 @@ class Bitbucket
     private $process;
     private $remoteFilesystem;
     private $token = array();
+    private $time;
 
     const OAUTH2_ACCESS_TOKEN_URL = 'https://bitbucket.org/site/oauth2/access_token';
 
@@ -37,21 +38,26 @@ class Bitbucket
      * @param Config           $config           The composer configuration
      * @param ProcessExecutor  $process          Process instance, injectable for mocking
      * @param RemoteFilesystem $remoteFilesystem Remote Filesystem, injectable for mocking
+     * @param int              $time             Timestamp, injectable for mocking
      */
-    public function __construct(IOInterface $io, Config $config, ProcessExecutor $process = null, RemoteFilesystem $remoteFilesystem = null)
+    public function __construct(IOInterface $io, Config $config, ProcessExecutor $process = null, RemoteFilesystem $remoteFilesystem = null, $time = null)
     {
         $this->io = $io;
         $this->config = $config;
         $this->process = $process ?: new ProcessExecutor;
         $this->remoteFilesystem = $remoteFilesystem ?: Factory::createRemoteFilesystem($this->io, $config);
+        $this->time = $time;
     }
 
     /**
-     * @return array
+     * @return string
      */
     public function getToken()
     {
-        return $this->token;
+        if (! isset($this->token['access_token'])) {
+            return '';
+        }
+        return $this->token['access_token'];
     }
 
     /**
@@ -109,6 +115,8 @@ class Bitbucket
 
             throw $e;
         }
+
+        return true;
     }
 
     /**
@@ -151,16 +159,13 @@ class Bitbucket
 
         $this->io->setAuthentication($originUrl, $consumerKey, $consumerSecret);
 
-        $this->requestAccessToken($originUrl);
+        if (! $this->requestAccessToken($originUrl)) {
+            return false;
+        }
 
         // store value in user config
-        $this->config->getConfigSource()->removeConfigSetting('bitbucket-oauth.'.$originUrl);
+        $this->storeInAuthConfig($originUrl, $consumerKey, $consumerSecret);
 
-        $consumer = array(
-            "consumer-key" => $consumerKey,
-            "consumer-secret" => $consumerSecret,
-        );
-        $this->config->getAuthConfigSource()->addConfigSetting('bitbucket-oauth.'.$originUrl, $consumer);
         // Remove conflicting basic auth credentials (if available)
         $this->config->getAuthConfigSource()->removeConfigSetting('http-basic.' . $originUrl);
 
@@ -175,17 +180,66 @@ class Bitbucket
      * @param  string $originUrl
      * @param  string $consumerKey
      * @param  string $consumerSecret
-     * @return array
+     * @return string
      */
     public function requestToken($originUrl, $consumerKey, $consumerSecret)
     {
-        if (!empty($this->token)) {
-            return $this->token;
+        if (!empty($this->token) || $this->getTokenFromConfig($originUrl)) {
+            return $this->token['access_token'];
         }
 
         $this->io->setAuthentication($originUrl, $consumerKey, $consumerSecret);
-        $this->requestAccessToken($originUrl);
+        if (! $this->requestAccessToken($originUrl)) {
+            return '';
+        }
+
+        $this->storeInAuthConfig($originUrl, $consumerKey, $consumerSecret);
+
+        return $this->token['access_token'];
+    }
+
+    /**
+     * Store the new/updated credentials to the configuration
+     * @param string $originUrl
+     * @param string $consumerKey
+     * @param string $consumerSecret
+     */
+    private function storeInAuthConfig($originUrl, $consumerKey, $consumerSecret)
+    {
+        $this->config->getConfigSource()->removeConfigSetting('bitbucket-oauth.'.$originUrl);
+
+        $time = null === $this->time ? time() : $this->time;
+        $consumer = array(
+            "consumer-key" => $consumerKey,
+            "consumer-secret" => $consumerSecret,
+            "access-token" => $this->token['access_token'],
+            "access-token-expiration" => $time + $this->token['expires_in']
+        );
 
-        return $this->token;
+        $this->config->getAuthConfigSource()->addConfigSetting('bitbucket-oauth.'.$originUrl, $consumer);
+    }
+
+    /**
+     * @param string $originUrl
+     * @return bool
+     */
+    private function getTokenFromConfig($originUrl)
+    {
+        $authConfig = $this->config->get('bitbucket-oauth');
+
+        if (empty($authConfig) ||
+            ! isset($authConfig[$originUrl]) ||
+            ! isset($authConfig[$originUrl]['access-token']) ||
+            ! isset($authConfig[$originUrl]['access-token-expiration']) ||
+            time() > $authConfig[$originUrl]['access-token-expiration']
+        ) {
+            return false;
+        }
+
+        $this->token = array(
+            'access_token' => $authConfig[$originUrl]['access-token']
+        );
+
+        return true;
     }
 }
diff --git a/src/Composer/Util/Git.php b/src/Composer/Util/Git.php
index c7e892244..90722bc5a 100644
--- a/src/Composer/Util/Git.php
+++ b/src/Composer/Util/Git.php
@@ -122,17 +122,17 @@ class Git
 
                     if (!$bitbucketUtil->authorizeOAuth($match[1]) && $this->io->isInteractive()) {
                         $bitbucketUtil->authorizeOAuthInteractively($match[1], $message);
-                        $token = $bitbucketUtil->getToken();
-                        $this->io->setAuthentication($match[1], 'x-token-auth', $token['access_token']);
+                        $access_token = $bitbucketUtil->getToken();
+                        $this->io->setAuthentication($match[1], 'x-token-auth', $access_token);
                     }
                 } else { //We're authenticating with a locally stored consumer.
                     $auth = $this->io->getAuthentication($match[1]);
 
                     //We already have an access_token from a previous request.
                     if ($auth['username'] !== 'x-token-auth') {
-                        $token = $bitbucketUtil->requestToken($match[1], $auth['username'], $auth['password']);
-                        if (!empty($token)) {
-                            $this->io->setAuthentication($match[1], 'x-token-auth', $token['access_token']);
+                        $access_token = $bitbucketUtil->requestToken($match[1], $auth['username'], $auth['password']);
+                        if (! empty($access_token)) {
+                            $this->io->setAuthentication($match[1], 'x-token-auth', $access_token);
                         }
                     }
                 }
diff --git a/src/Composer/Util/RemoteFilesystem.php b/src/Composer/Util/RemoteFilesystem.php
index 5b137686d..4437f79ea 100644
--- a/src/Composer/Util/RemoteFilesystem.php
+++ b/src/Composer/Util/RemoteFilesystem.php
@@ -601,9 +601,9 @@ class RemoteFilesystem
                 $auth = $this->io->getAuthentication($this->originUrl);
                 if ($auth['username'] !== 'x-token-auth') {
                     $bitbucketUtil = new Bitbucket($this->io, $this->config);
-                    $token = $bitbucketUtil->requestToken($this->originUrl, $auth['username'], $auth['password']);
-                    if (! empty($token)) {
-                        $this->io->setAuthentication($this->originUrl, 'x-token-auth', $token['access_token']);
+                    $access_token = $bitbucketUtil->requestToken($this->originUrl, $auth['username'], $auth['password']);
+                    if (! empty($access_token)) {
+                        $this->io->setAuthentication($this->originUrl, 'x-token-auth', $access_token);
                         $askForOAuthToken = false;
                     }
                 } else {
diff --git a/tests/Composer/Test/Util/BitbucketTest.php b/tests/Composer/Test/Util/BitbucketTest.php
index 45b4ce752..e9ca9e269 100644
--- a/tests/Composer/Test/Util/BitbucketTest.php
+++ b/tests/Composer/Test/Util/BitbucketTest.php
@@ -35,6 +35,8 @@ class BitbucketTest extends \PHPUnit_Framework_TestCase
     private $config;
     /** @type Bitbucket */
     private $bitbucket;
+    /** @var int */
+    private $time;
 
     protected function setUp()
     {
@@ -52,7 +54,9 @@ class BitbucketTest extends \PHPUnit_Framework_TestCase
 
         $this->config = $this->getMock('Composer\Config');
 
-        $this->bitbucket = new Bitbucket($this->io, $this->config, null, $this->rfs);
+        $this->time = time();
+
+        $this->bitbucket = new Bitbucket($this->io, $this->config, null, $this->rfs, $this->time);
     }
 
     public function testRequestAccessTokenWithValidOAuthConsumer()
@@ -82,14 +86,15 @@ class BitbucketTest extends \PHPUnit_Framework_TestCase
                 )
             );
 
+        $this->config->expects($this->once())
+            ->method('get')
+            ->with('bitbucket-oauth')
+            ->willReturn(null);
+
+        $this->setExpectationsForStoringAccessToken();
+
         $this->assertEquals(
-            array(
-                'access_token' => $this->token,
-                'scopes' => 'repository',
-                'expires_in' => 3600,
-                'refresh_token' => 'refreshtoken',
-                'token_type' => 'bearer'
-            ),
+            $this->token,
             $this->bitbucket->requestToken($this->origin, $this->consumer_key, $this->consumer_secret)
         );
     }
@@ -133,7 +138,12 @@ class BitbucketTest extends \PHPUnit_Framework_TestCase
                 )
             );
 
-        $this->assertEquals(array(), $this->bitbucket->requestToken($this->origin, $this->username, $this->password));
+        $this->config->expects($this->once())
+            ->method('get')
+            ->with('bitbucket-oauth')
+            ->willReturn(null);
+
+        $this->assertEquals('', $this->bitbucket->requestToken($this->origin, $this->username, $this->password));
     }
 
     public function testUsernamePasswordAuthenticationFlow()
@@ -161,67 +171,51 @@ class BitbucketTest extends \PHPUnit_Framework_TestCase
                 $this->isFalse(),
                 $this->anything()
             )
-            ->willReturn(sprintf('{}', $this->token))
-        ;
-
-        $authJson = $this->getAuthJsonMock();
-        $this->config
-            ->expects($this->exactly(3))
-            ->method('getAuthConfigSource')
-            ->willReturn($authJson)
-        ;
-        $this->config
-            ->expects($this->once())
-            ->method('getConfigSource')
-            ->willReturn($this->getConfJsonMock())
-        ;
-
-        $authJson->expects($this->once())
-            ->method('addConfigSetting')
-            ->with(
-                'bitbucket-oauth.'.$this->origin,
-                array(
-                    'consumer-key' => $this->consumer_key,
-                    'consumer-secret' => $this->consumer_secret
+            ->willReturn(
+                sprintf(
+                    '{"access_token": "%s", "scopes": "repository", "expires_in": 3600, "refresh_token": "refresh_token", "token_type": "bearer"}',
+                    $this->token
                 )
-            );
+            )
+        ;
 
-        $authJson->expects($this->once())
-            ->method('removeConfigSetting')
-            ->with('http-basic.'.$this->origin);
+        $this->setExpectationsForStoringAccessToken(true);
 
         $this->assertTrue($this->bitbucket->authorizeOAuthInteractively($this->origin, $this->message));
     }
 
-    private function getAuthJsonMock()
+    private function setExpectationsForStoringAccessToken($removeBasicAuth = false)
     {
-        $authjson = $this
-            ->getMockBuilder('Composer\Config\JsonConfigSource')
-            ->disableOriginalConstructor()
-            ->getMock()
-        ;
-        $authjson
-            ->expects($this->atLeastOnce())
-            ->method('getName')
-            ->willReturn('auth.json')
-        ;
-
-        return $authjson;
-    }
+        $configSourceMock = $this->getMock('Composer\Config\ConfigSourceInterface');
+        $this->config->expects($this->once())
+            ->method('getConfigSource')
+            ->willReturn($configSourceMock);
 
-    private function getConfJsonMock()
-    {
-        $confjson = $this
-            ->getMockBuilder('Composer\Config\JsonConfigSource')
-            ->disableOriginalConstructor()
-            ->getMock()
-        ;
-        $confjson
-            ->expects($this->atLeastOnce())
+        $configSourceMock->expects($this->once())
             ->method('removeConfigSetting')
-            ->with('bitbucket-oauth.'.$this->origin)
-        ;
+            ->with('bitbucket-oauth.' . $this->origin);
+
+        $authConfigSourceMock = $this->getMock('Composer\Config\ConfigSourceInterface');
+        $this->config->expects($this->atLeastOnce())
+            ->method('getAuthConfigSource')
+            ->willReturn($authConfigSourceMock);
+
+        $authConfigSourceMock->expects($this->once())
+            ->method('addConfigSetting')
+            ->with(
+                'bitbucket-oauth.' . $this->origin,
+                array(
+                    "consumer-key" => $this->consumer_key,
+                    "consumer-secret" => $this->consumer_secret,
+                    "access-token" => $this->token,
+                    "access-token-expiration" => $this->time + 3600
+                )
+            );
 
-        return $confjson;
+        if ($removeBasicAuth) {
+            $authConfigSourceMock->expects($this->once())
+                ->method('removeConfigSetting')
+                ->with('http-basic.' . $this->origin);
+        }
     }
 }