diff --git a/Encoder/XmlEncoder.php b/Encoder/XmlEncoder.php
index 86a844e53519..9c7c01b42aa7 100644
--- a/Encoder/XmlEncoder.php
+++ b/Encoder/XmlEncoder.php
@@ -431,7 +431,7 @@ private function buildXml(\DOMNode $parentNode, $data, string $xmlRootNodeName =
                         /*
                          * Create nodes to append to $parentNode based on the $key of this array
                          * Produces <xml><item>0</item><item>1</item></xml>
-                         * From array("item" => array(0,1));.
+                         * From ["item" => [0,1]];.
                          */
                         foreach ($data as $subData) {
                             $append = $this->appendNode($parentNode, $subData, $key);
diff --git a/Normalizer/AbstractNormalizer.php b/Normalizer/AbstractNormalizer.php
index 34b02fed1d3e..300c7f1b3c68 100644
--- a/Normalizer/AbstractNormalizer.php
+++ b/Normalizer/AbstractNormalizer.php
@@ -239,10 +239,10 @@ protected function isCircularReference($object, &$context)
      *
      * @throws CircularReferenceException
      */
-    protected function handleCircularReference($object/*, string $format = null, array $context = array()*/)
+    protected function handleCircularReference($object/*, string $format = null, array $context = []*/)
     {
         if (\func_num_args() < 2 && __CLASS__ !== \get_class($this) && __CLASS__ !== (new \ReflectionMethod($this, __FUNCTION__))->getDeclaringClass()->getName() && !$this instanceof \PHPUnit\Framework\MockObject\MockObject && !$this instanceof \Prophecy\Prophecy\ProphecySubjectInterface) {
-            @trigger_error(sprintf('The "%s()" method will have two new "string $format = null" and "array $context = array()" arguments in version 5.0, not defining it is deprecated since Symfony 4.2.', __METHOD__), E_USER_DEPRECATED);
+            @trigger_error(sprintf('The "%s()" method will have two new "string $format = null" and "array $context = []" arguments in version 5.0, not defining it is deprecated since Symfony 4.2.', __METHOD__), E_USER_DEPRECATED);
         }
         $format = \func_num_args() > 1 ? func_get_arg(1) : null;
         $context = \func_num_args() > 2 ? func_get_arg(2) : [];