diff --git a/src/Symfony/Component/Security/Core/Resources/translations/security.tr.xlf b/src/Symfony/Component/Security/Core/Resources/translations/security.tr.xlf
index fbf9b260b05c..68c44213d18c 100644
--- a/src/Symfony/Component/Security/Core/Resources/translations/security.tr.xlf
+++ b/src/Symfony/Component/Security/Core/Resources/translations/security.tr.xlf
@@ -8,7 +8,7 @@
             </trans-unit>
             <trans-unit id="2">
                 <source>Authentication credentials could not be found.</source>
-                <target>Yetkilendirme girdileri bulunamadı.</target>
+                <target>Kimlik bilgileri bulunamadı.</target>
             </trans-unit>
             <trans-unit id="3">
                 <source>Authentication request could not be processed due to a system problem.</source>
@@ -16,7 +16,7 @@
             </trans-unit>
             <trans-unit id="4">
                 <source>Invalid credentials.</source>
-                <target>Geçersiz girdiler.</target>
+                <target>Geçersiz kimlik bilgileri.</target>
             </trans-unit>
             <trans-unit id="5">
                 <source>Cookie has already been used by someone else.</source>
@@ -32,7 +32,7 @@
             </trans-unit>
             <trans-unit id="8">
                 <source>Digest nonce has expired.</source>
-                <target>Derleme zaman aşımı gerçekleşti.</target>
+                <target>Derleme zaman aşımına uğradı.</target>
             </trans-unit>
             <trans-unit id="9">
                 <source>No authentication provider found to support the authentication token.</source>
@@ -44,7 +44,7 @@
             </trans-unit>
             <trans-unit id="11">
                 <source>No token could be found.</source>
-                <target>Bilet bulunamadı.</target>
+                <target>Fiş bulunamadı.</target>
             </trans-unit>
             <trans-unit id="12">
                 <source>Username could not be found.</source>
@@ -56,11 +56,11 @@
             </trans-unit>
             <trans-unit id="14">
                 <source>Credentials have expired.</source>
-                <target>Girdiler zaman aşımına uğradı.</target>
+                <target>Kimlik bilgileri zaman aşımına uğradı.</target>
             </trans-unit>
             <trans-unit id="15">
                 <source>Account is disabled.</source>
-                <target>Hesap devre dışı bırakılmış.</target>
+                <target>Hesap engellenmiş.</target>
             </trans-unit>
             <trans-unit id="16">
                 <source>Account is locked.</source>
diff --git a/src/Symfony/Component/Security/Tests/TranslationSyncStatusTest.php b/src/Symfony/Component/Security/Tests/TranslationSyncStatusTest.php
new file mode 100644
index 000000000000..4b72d41d5a5e
--- /dev/null
+++ b/src/Symfony/Component/Security/Tests/TranslationSyncStatusTest.php
@@ -0,0 +1,63 @@
+<?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\Security\Tests;
+
+use Symfony\Component\Finder\Finder;
+
+class TranslationSyncStatusTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @dataProvider getTranslationDirectoriesData
+     */
+    public function testTranslationFileIsNotMissingInCore($dir1, $dir2)
+    {
+        $finder = new Finder();
+        $files = $finder->in($dir1)->files();
+
+        foreach ($files as $file) {
+            $this->assertFileExists($dir2.'/'.$file->getFilename(), 'Missing file '.$file->getFilename().' in directory '.$dir2);
+        }
+    }
+
+    public function getTranslationDirectoriesData()
+    {
+        $legacyTranslationsDir = $this->getLegacyTranslationsDirectory();
+        $coreTranslationsDir = $this->getCoreTranslationsDirectory();
+
+        return array(
+            'file-not-missing-in-core' => array($legacyTranslationsDir, $coreTranslationsDir),
+            'file-not-added-in-core' => array($coreTranslationsDir, $legacyTranslationsDir),
+        );
+    }
+
+    public function testFileContentsAreEqual()
+    {
+        $finder = new Finder();
+        $files = $finder->in($this->getLegacyTranslationsDirectory())->files();
+
+        foreach ($files as $file) {
+            $coreFile = $this->getCoreTranslationsDirectory().'/'.$file->getFilename();
+
+            $this->assertFileEquals($file->getRealPath(), $coreFile, $file.' and '.$coreFile.' have equal content.');
+        }
+    }
+
+    private function getLegacyTranslationsDirectory()
+    {
+        return __DIR__.'/../Resources/translations';
+    }
+
+    private function getCoreTranslationsDirectory()
+    {
+        return __DIR__.'/../Core/Resources/translations';
+    }
+}
diff --git a/src/Symfony/Component/Security/composer.json b/src/Symfony/Component/Security/composer.json
index 1f0584467ec4..826dcebb3778 100644
--- a/src/Symfony/Component/Security/composer.json
+++ b/src/Symfony/Component/Security/composer.json
@@ -28,6 +28,7 @@
         "symfony/security-http": "self.version"
     },
     "require-dev": {
+        "symfony/finder": "~2.3",
         "symfony/phpunit-bridge": "~2.7",
         "symfony/intl": "~2.3",
         "symfony/routing": "~2.2",
diff --git a/src/Symfony/Component/Security/phpunit.xml.dist b/src/Symfony/Component/Security/phpunit.xml.dist
index 7747b371c171..3e7ec385260e 100644
--- a/src/Symfony/Component/Security/phpunit.xml.dist
+++ b/src/Symfony/Component/Security/phpunit.xml.dist
@@ -12,6 +12,7 @@
 
     <testsuites>
         <testsuite name="Symfony Security Component Test Suite">
+            <directory>./Tests/</directory>
             <directory>./Acl/Tests/</directory>
             <directory>./Core/Tests/</directory>
             <directory>./Http/Tests/</directory>
@@ -23,6 +24,7 @@
             <directory>./</directory>
             <exclude>
                 <directory>./vendor</directory>
+                <directory>./Tests</directory>
                 <directory>./Acl/Tests</directory>
                 <directory>./Core/Tests</directory>
                 <directory>./Http/Tests</directory>