diff --git a/.phive/phars.xml b/.phive/phars.xml
index 64a04a5621a..5090fa31bf2 100644
--- a/.phive/phars.xml
+++ b/.phive/phars.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phive xmlns="https://phar.io/phive">
   <phar name="phpab" version="^1.25" installed="1.28.0" location="./tools/phpab" copy="true"/>
-  <phar name="php-cs-fixer" version="^3.0" installed="3.22.0" location="./tools/php-cs-fixer" copy="true"/>
+  <phar name="php-cs-fixer" version="^3.0" installed="3.23.0" location="./tools/php-cs-fixer" copy="true"/>
   <phar name="psalm" version="^5.0" installed="5.14.1" location="./tools/psalm" copy="true"/>
   <phar name="humbug/php-scoper" version="^0.18.1" installed="0.18.3" location="./tools/php-scoper" copy="true"/>
   <phar name="composer" version="^2.0.3" installed="2.5.8" location="./tools/composer" copy="true"/>
diff --git a/tests/_files/CoverageTwoDefaultClassAnnotations.php b/tests/_files/CoverageTwoDefaultClassAnnotations.php
index 2507876c6c4..694ab21e0c6 100644
--- a/tests/_files/CoverageTwoDefaultClassAnnotations.php
+++ b/tests/_files/CoverageTwoDefaultClassAnnotations.php
@@ -1,4 +1,5 @@
 <?php declare(strict_types=1);
+
 /*
  * This file is part of PHPUnit.
  *
diff --git a/tests/end-to-end/phar/src/autoload.php b/tests/end-to-end/phar/src/autoload.php
index fe06290f3eb..c66cf5e50f1 100644
--- a/tests/end-to-end/phar/src/autoload.php
+++ b/tests/end-to-end/phar/src/autoload.php
@@ -1,4 +1,5 @@
 <?php declare(strict_types=1);
+
 /*
  * This file is part of PHPUnit.
  *
diff --git a/tests/end-to-end/regression/2724/SeparateClassRunMethodInNewProcessTest.php b/tests/end-to-end/regression/2724/SeparateClassRunMethodInNewProcessTest.php
index 05a9415eded..c384a1767b9 100644
--- a/tests/end-to-end/regression/2724/SeparateClassRunMethodInNewProcessTest.php
+++ b/tests/end-to-end/regression/2724/SeparateClassRunMethodInNewProcessTest.php
@@ -1,4 +1,5 @@
 <?php declare(strict_types=1);
+
 /*
  * This file is part of PHPUnit.
  *
diff --git a/tests/end-to-end/regression/797/bootstrap797.php b/tests/end-to-end/regression/797/bootstrap797.php
index 4685a0e70f2..68b036c2c2e 100644
--- a/tests/end-to-end/regression/797/bootstrap797.php
+++ b/tests/end-to-end/regression/797/bootstrap797.php
@@ -1,4 +1,5 @@
 <?php declare(strict_types=1);
+
 /*
  * This file is part of PHPUnit.
  *
diff --git a/tests/end-to-end/regression/873/Issue873Test.php b/tests/end-to-end/regression/873/Issue873Test.php
index 44ae9c55ef0..5fa283dd2af 100644
--- a/tests/end-to-end/regression/873/Issue873Test.php
+++ b/tests/end-to-end/regression/873/Issue873Test.php
@@ -1,4 +1,5 @@
 <?php declare(strict_types=1);
+
 /*
  * This file is part of PHPUnit.
  *
diff --git a/tools/php-cs-fixer b/tools/php-cs-fixer
index db0c65c0c5a..d5c28ba88e4 100755
Binary files a/tools/php-cs-fixer and b/tools/php-cs-fixer differ