diff --git a/src/Symfony/Component/HttpFoundation/Tests/ClockMock.php b/src/Symfony/Component/HttpFoundation/Tests/ClockMock.php
new file mode 100644
index 0000000000..04a842d9b5
--- /dev/null
+++ b/src/Symfony/Component/HttpFoundation/Tests/ClockMock.php
@@ -0,0 +1,24 @@
+<?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;
+
+function time($asFloat = false)
+{
+    return Tests\time();
+}
+
+namespace Symfony\Component\HttpFoundation\Tests;
+
+function time()
+{
+    return $_SERVER['REQUEST_TIME'];
+}
diff --git a/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php b/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php
index 0aaeb6baa1..b8474db15f 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php
@@ -13,6 +13,8 @@ namespace Symfony\Component\HttpFoundation\Tests;
 
 use Symfony\Component\HttpFoundation\Cookie;
 
+require_once __DIR__.'/ClockMock.php';
+
 /**
  * CookieTest.
  *
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
index 8ff8662e99..b4164c8a28 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
@@ -14,6 +14,8 @@ namespace Symfony\Component\HttpFoundation\Tests;
 use Symfony\Component\HttpFoundation\ResponseHeaderBag;
 use Symfony\Component\HttpFoundation\Cookie;
 
+require_once __DIR__.'/ClockMock.php';
+
 class ResponseHeaderBagTest extends \PHPUnit_Framework_TestCase
 {
     /**
diff --git a/src/Symfony/Component/Stopwatch/Tests/ClockMock.php b/src/Symfony/Component/Stopwatch/Tests/ClockMock.php
new file mode 100644
index 0000000000..5bbe6b1db8
--- /dev/null
+++ b/src/Symfony/Component/Stopwatch/Tests/ClockMock.php
@@ -0,0 +1,39 @@
+<?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\Stopwatch;
+
+function microtime($asFloat = false)
+{
+    return Tests\microtime($asFloat);
+}
+
+namespace Symfony\Component\Stopwatch\Tests;
+
+function usleep($us)
+{
+    static $now;
+
+    if (null === $now) {
+        $now = \microtime(true);
+    }
+
+    return $now += $us / 1000000;
+}
+
+function microtime($asFloat = false)
+{
+    if (!$asFloat) {
+        return \microtime(false);
+    }
+
+    return usleep(1);
+}
diff --git a/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php b/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php
index 9ef3abaea9..44928ace19 100644
--- a/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php
+++ b/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php
@@ -13,6 +13,8 @@ namespace Symfony\Component\Stopwatch\Tests;
 
 use Symfony\Component\Stopwatch\StopwatchEvent;
 
+require_once __DIR__.'/ClockMock.php';
+
 /**
  * StopwatchEventTest.
  *
diff --git a/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php b/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php
index 74ad1d8da1..f13955d30b 100644
--- a/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php
+++ b/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php
@@ -13,6 +13,8 @@ namespace Symfony\Component\Stopwatch\Tests;
 
 use Symfony\Component\Stopwatch\Stopwatch;
 
+require_once __DIR__.'/ClockMock.php';
+
 /**
  * StopwatchTest.
  *