diff --git a/src/Symfony/Component/DependencyInjection/Container.php b/src/Symfony/Component/DependencyInjection/Container.php
index f6c953f550..7bf2e36ec2 100644
--- a/src/Symfony/Component/DependencyInjection/Container.php
+++ b/src/Symfony/Component/DependencyInjection/Container.php
@@ -29,16 +29,6 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
  *
  * Parameter and service keys are case insensitive.
  *
- * A service id can contain lowercased letters, digits, underscores, and dots.
- * Underscores are used to separate words, and dots to group services
- * under namespaces:
- *
- * <ul>
- *   <li>request</li>
- *   <li>mysql_session_storage</li>
- *   <li>symfony.mysql_session_storage</li>
- * </ul>
- *
  * A service can also be defined by creating a method named
  * getXXXService(), where XXX is the camelized version of the id:
  *
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php b/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php
index 02018c5a0a..5ec0deed3d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php
@@ -134,8 +134,8 @@ class ContainerTest extends TestCase
     public function testSet()
     {
         $sc = new Container();
-        $sc->set('foo', $foo = new \stdClass());
-        $this->assertSame($foo, $sc->get('foo'), '->set() sets a service');
+        $sc->set('._. \\o/', $foo = new \stdClass());
+        $this->assertSame($foo, $sc->get('._. \\o/'), '->set() sets a service');
     }
 
     public function testSetWithNullResetTheService()