diff --git a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php
index 36f34ea685..11d5ad4d37 100644
--- a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php
+++ b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php
@@ -127,8 +127,9 @@ if (!file_exists("$PHPUNIT_DIR/phpunit-$PHPUNIT_VERSION/phpunit") || md5_file(__
     }
     $prevRoot = getenv('COMPOSER_ROOT_VERSION');
     putenv("COMPOSER_ROOT_VERSION=$PHPUNIT_VERSION.99");
+    $q = '\\' === DIRECTORY_SEPARATOR ? '"' : '';
     // --no-suggest is not in the list to keep compat with composer 1.0, which is shipped with Ubuntu 16.04LTS
-    $exit = proc_close(proc_open("$COMPOSER install --no-dev --prefer-dist --no-progress --ansi", array(), $p, getcwd()));
+    $exit = proc_close(proc_open("$q$COMPOSER install --no-dev --prefer-dist --no-progress --ansi$q", array(), $p, getcwd()));
     putenv('COMPOSER_ROOT_VERSION'.(false !== $prevRoot ? '='.$prevRoot : ''));
     if ($exit) {
         exit($exit);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
index cc1b858abb..fe0d60b555 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
@@ -52,6 +52,9 @@ abstract class AbstractConfigCommand extends ContainerDebugCommand
         }
     }
 
+    /**
+     * @return ExtensionInterface
+     */
     protected function findExtension($name)
     {
         $bundles = $this->initializeBundles();
diff --git a/src/Symfony/Component/Config/Definition/ArrayNode.php b/src/Symfony/Component/Config/Definition/ArrayNode.php
index 43697ef279..e741b8a02d 100644
--- a/src/Symfony/Component/Config/Definition/ArrayNode.php
+++ b/src/Symfony/Component/Config/Definition/ArrayNode.php
@@ -141,7 +141,7 @@ class ArrayNode extends BaseNode implements PrototypeNodeInterface
     }
 
     /**
-     * Whether extra keys should just be ignore without an exception.
+     * Whether extra keys should just be ignored without an exception.
      *
      * @param bool $boolean To allow extra keys
      * @param bool $remove  To remove extra keys