diff --git a/src/Composer/Config/JsonConfigSource.php b/src/Composer/Config/JsonConfigSource.php
index 384e153c8..4e116cc60 100644
--- a/src/Composer/Config/JsonConfigSource.php
+++ b/src/Composer/Config/JsonConfigSource.php
@@ -30,14 +30,14 @@ class JsonConfigSource implements ConfigSourceInterface
 
     public function addRepository($name, $config)
     {
-        return $this->manipulateJson('addRepository', $name, $config, function (&$config, $repo, $repoConfig) {
+        $this->manipulateJson('addRepository', $name, $config, function (&$config, $repo, $repoConfig) {
             $config['repositories'][$repo] = $repoConfig;
         });
     }
 
     public function removeRepository($name)
     {
-        return $this->manipulateJson('removeRepository', $name, function (&$config, $repo) {
+        $this->manipulateJson('removeRepository', $name, function (&$config, $repo) {
             unset($config['repositories'][$repo]);
         });
     }
@@ -51,7 +51,7 @@ class JsonConfigSource implements ConfigSourceInterface
 
     public function removeConfigSetting($name)
     {
-        return $this->manipulateJson('removeConfigSetting', $name, function (&$config, $key) {
+        $this->manipulateJson('removeConfigSetting', $name, function (&$config, $key) {
             unset($config['config'][$key]);
         });
     }
diff --git a/tests/Composer/Test/Mock/RemoteFilesystemMock.php b/tests/Composer/Test/Mock/RemoteFilesystemMock.php
index 444c557e2..caf1c5e65 100644
--- a/tests/Composer/Test/Mock/RemoteFilesystemMock.php
+++ b/tests/Composer/Test/Mock/RemoteFilesystemMock.php
@@ -28,7 +28,7 @@ class RemoteFilesystemMock extends RemoteFilesystem
         $this->contentMap = $contentMap;
     }
 
-    public function getContents($originUrl, $fileUrl, $progress = true)
+    public function getContents($originUrl, $fileUrl, $progress = true, $options = array())
     {
         if (!empty($this->contentMap[$fileUrl])) {
             return $this->contentMap[$fileUrl];
diff --git a/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php b/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php
index d8fdebd07..2cd9b2364 100644
--- a/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php
+++ b/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php
@@ -68,14 +68,22 @@ class GitHubDriverTest extends \PHPUnit_Framework_TestCase
             ->with($this->equalTo('Password: '))
             ->will($this->returnValue('somepassword'));
 
-        $io->expects($this->once())
+        $io->expects($this->any())
             ->method('setAuthorization')
-            ->with($this->equalTo('github.com'), 'someuser', 'somepassword');
+            ->with($this->equalTo('github.com'), $this->matchesRegularExpression('{someuser|abcdef}'), $this->matchesRegularExpression('{somepassword|x-oauth-basic}'));
 
         $remoteFilesystem->expects($this->at(1))
+            ->method('getContents')
+            ->with($this->equalTo('github.com'), $this->equalTo('https://api.github.com/authorizations'), $this->equalTo(false))
+            ->will($this->returnValue('{"token": "abcdef"}'));
+
+        $remoteFilesystem->expects($this->at(2))
             ->method('getContents')
             ->with($this->equalTo('github.com'), $this->equalTo($repoApiUrl), $this->equalTo(false))
-            ->will($this->returnValue('{"master_branch": "test_master"}'));
+            ->will($this->returnValue('{"master_branch": "test_master", "private": true}'));
+
+        $configSource = $this->getMock('Composer\Config\ConfigSourceInterface');
+        $this->config->setConfigSource($configSource);
 
         $gitHubDriver = new GitHubDriver($repoUrl, $io, $this->config, $process, $remoteFilesystem);
         $gitHubDriver->initialize();
diff --git a/tests/Composer/Test/Util/RemoteFilesystemTest.php b/tests/Composer/Test/Util/RemoteFilesystemTest.php
index 4dd3aa0e7..def4b14c4 100644
--- a/tests/Composer/Test/Util/RemoteFilesystemTest.php
+++ b/tests/Composer/Test/Util/RemoteFilesystemTest.php
@@ -25,7 +25,7 @@ class RemoteFilesystemTest extends \PHPUnit_Framework_TestCase
             ->will($this->returnValue(false))
         ;
 
-        $res = $this->callGetOptionsForUrl($io, array('http://example.org'));
+        $res = $this->callGetOptionsForUrl($io, array('http://example.org', array()));
         $this->assertTrue(isset($res['http']['header']) && false !== strpos($res['http']['header'], 'User-Agent'), 'getOptions must return an array with a header containing a User-Agent');
     }
 
@@ -43,7 +43,7 @@ class RemoteFilesystemTest extends \PHPUnit_Framework_TestCase
             ->will($this->returnValue(array('username' => 'login', 'password' => 'password')))
         ;
 
-        $options = $this->callGetOptionsForUrl($io, array('http://example.org'));
+        $options = $this->callGetOptionsForUrl($io, array('http://example.org', array()));
         $this->assertContains('Authorization: Basic', $options['http']['header']);
     }
 
@@ -60,10 +60,28 @@ class RemoteFilesystemTest extends \PHPUnit_Framework_TestCase
             'allow_self_signed' => true,
         ));
 
-        $res = $this->callGetOptionsForUrl($io, array('https://example.org'), $streamOptions);
+        $res = $this->callGetOptionsForUrl($io, array('https://example.org', array()), $streamOptions);
         $this->assertTrue(isset($res['ssl']) && isset($res['ssl']['allow_self_signed']) && true === $res['ssl']['allow_self_signed'], 'getOptions must return an array with a allow_self_signed set to true');
     }
 
+    public function testGetOptionsForUrlWithCallOptionsKeepsHeader()
+    {
+        $io = $this->getMock('Composer\IO\IOInterface');
+        $io
+            ->expects($this->once())
+            ->method('hasAuthorization')
+            ->will($this->returnValue(true))
+        ;
+
+        $streamOptions = array('http' => array(
+            'header' => 'Foo: bar',
+        ));
+
+        $res = $this->callGetOptionsForUrl($io, array('https://example.org', $streamOptions));
+        $this->assertTrue(isset($res['http']['header']), 'getOptions must return an array with a http.header key');
+        $this->assertGreaterThan(strlen('Foo: bar'), strlen($res['http']['header']));
+    }
+
     public function testCallbackGetFileSize()
     {
         $fs = new RemoteFilesystem($this->getMock('Composer\IO\IOInterface'));