diff --git a/src/Symfony/Component/HttpFoundation/Tests/RequestStackTest.php b/src/Symfony/Component/HttpFoundation/Tests/RequestStackTest.php
new file mode 100644
index 0000000000..e26b806fd2
--- /dev/null
+++ b/src/Symfony/Component/HttpFoundation/Tests/RequestStackTest.php
@@ -0,0 +1,69 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpFoundation\Tests;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestStack;
+
+class RequestStackTest extends \PHPUnit_Framework_TestCase
+{
+    public function testGetCurrentRequest()
+    {
+        $requestStack = new RequestStack();
+        $this->assertNull($requestStack->getCurrentRequest());
+
+        $request = Request::create('/foo');
+
+        $requestStack->push($request);
+        $this->assertSame($request, $requestStack->getCurrentRequest());
+
+        $this->assertSame($request, $requestStack->pop());
+        $this->assertNull($requestStack->getCurrentRequest());
+
+        $this->assertNull($requestStack->pop());
+    }
+
+    public function testGetMasterRequest()
+    {
+        $requestStack = new RequestStack();
+        $this->assertNull($requestStack->getMasterRequest());
+
+        $masterRequest = Request::create('/foo');
+        $subRequest = Request::create('/bar');
+
+        $requestStack->push($masterRequest);
+        $requestStack->push($subRequest);
+
+        $this->assertSame($masterRequest, $requestStack->getMasterRequest());
+    }
+
+    public function testGetParentRequest()
+    {
+        $requestStack = new RequestStack();
+        $this->assertNull($requestStack->getParentRequest());
+
+        $masterRequest = Request::create('/foo');
+
+        $requestStack->push($masterRequest);
+        $this->assertNull($requestStack->getParentRequest());
+
+        $firstSubRequest = Request::create('/bar');
+
+        $requestStack->push($firstSubRequest);
+        $this->assertSame($masterRequest, $requestStack->getParentRequest());
+
+        $secondSubRequest = Request::create('/baz');
+
+        $requestStack->push($secondSubRequest);
+        $this->assertSame($firstSubRequest, $requestStack->getParentRequest());
+    }
+}
diff --git a/src/Symfony/Component/HttpKernel/Profiler/MemcacheProfilerStorage.php b/src/Symfony/Component/HttpKernel/Profiler/MemcacheProfilerStorage.php
index 2034a19db1..ad70b97b9b 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/MemcacheProfilerStorage.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/MemcacheProfilerStorage.php
@@ -11,8 +11,6 @@
 
 namespace Symfony\Component\HttpKernel\Profiler;
 
-use Memcache;
-
 /**
  * Memcache Profiler Storage
  *
@@ -21,14 +19,14 @@ use Memcache;
 class MemcacheProfilerStorage extends BaseMemcacheProfilerStorage
 {
     /**
-     * @var Memcache
+     * @var \Memcache
      */
     private $memcache;
 
     /**
      * Internal convenience method that returns the instance of the Memcache
      *
-     * @return Memcache
+     * @return \Memcache
      *
      * @throws \RuntimeException
      */
@@ -42,7 +40,7 @@ class MemcacheProfilerStorage extends BaseMemcacheProfilerStorage
             $host = $matches[1] ?: $matches[2];
             $port = $matches[3];
 
-            $memcache = new Memcache();
+            $memcache = new \Memcache();
             $memcache->addServer($host, $port);
 
             $this->memcache = $memcache;
@@ -54,7 +52,7 @@ class MemcacheProfilerStorage extends BaseMemcacheProfilerStorage
     /**
      * Set instance of the Memcache
      *
-     * @param Memcache $memcache
+     * @param \Memcache $memcache
      */
     public function setMemcache($memcache)
     {
@@ -94,7 +92,7 @@ class MemcacheProfilerStorage extends BaseMemcacheProfilerStorage
 
         if (method_exists($memcache, 'append')) {
 
-            //Memcache v3.0
+            // Memcache v3.0
             if (!$result = $memcache->append($key, $value, false, $expiration)) {
                 return $memcache->set($key, $value, false, $expiration);
             }
@@ -102,7 +100,7 @@ class MemcacheProfilerStorage extends BaseMemcacheProfilerStorage
             return $result;
         }
 
-        //simulate append in Memcache <3.0
+        // simulate append in Memcache <3.0
         $content = $memcache->get($key);
 
         return $memcache->set($key, $content.$value, false, $expiration);
diff --git a/src/Symfony/Component/HttpKernel/Profiler/MemcachedProfilerStorage.php b/src/Symfony/Component/HttpKernel/Profiler/MemcachedProfilerStorage.php
index 31f3136390..94a562694b 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/MemcachedProfilerStorage.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/MemcachedProfilerStorage.php
@@ -11,8 +11,6 @@
 
 namespace Symfony\Component\HttpKernel\Profiler;
 
-use Memcached;
-
 /**
  * Memcached Profiler Storage
  *
@@ -21,14 +19,14 @@ use Memcached;
 class MemcachedProfilerStorage extends BaseMemcacheProfilerStorage
 {
     /**
-     * @var Memcached
+     * @var \Memcached
      */
     private $memcached;
 
     /**
      * Internal convenience method that returns the instance of the Memcached
      *
-     * @return Memcached
+     * @return \Memcached
      *
      * @throws \RuntimeException
      */
@@ -42,10 +40,10 @@ class MemcachedProfilerStorage extends BaseMemcacheProfilerStorage
             $host = $matches[1] ?: $matches[2];
             $port = $matches[3];
 
-            $memcached = new Memcached();
+            $memcached = new \Memcached();
 
-            //disable compression to allow appending
-            $memcached->setOption(Memcached::OPT_COMPRESSION, false);
+            // disable compression to allow appending
+            $memcached->setOption(\Memcached::OPT_COMPRESSION, false);
 
             $memcached->addServer($host, $port);
 
@@ -58,7 +56,7 @@ class MemcachedProfilerStorage extends BaseMemcacheProfilerStorage
     /**
      * Set instance of the Memcached
      *
-     * @param Memcached $memcached
+     * @param \Memcached $memcached
      */
     public function setMemcached($memcached)
     {