diff --git a/.github/workflows/cs.yaml b/.github/workflows/cs.yaml
index 66541e4..94f41da 100644
--- a/.github/workflows/cs.yaml
+++ b/.github/workflows/cs.yaml
@@ -17,9 +17,6 @@ jobs:
   coding-standards:
     runs-on: ubuntu-latest
 
-    env:
-        PHP_CS_FIXER_IGNORE_ENV: '1'
-
     strategy:
       matrix:
         operating-system: [ ubuntu-latest ]
diff --git a/.gitignore b/.gitignore
index 6cb4684..2c4fd92 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,10 +6,10 @@
 /.php-cs-fixer.cache
 /.tools/
 /build/
+/composer.lock
 /infection.log
 /tests/**/_generated/
 /tests/**/_output/
 /tests/e2e/*/var/
 /var/
 /vendor/
-/composer.lock
diff --git a/.php-cs-fixer.php b/.php-cs-fixer.php
index 11147f1..e71a9f1 100644
--- a/.php-cs-fixer.php
+++ b/.php-cs-fixer.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 use PhpCsFixer\Config;
 use PhpCsFixer\Finder;
 
@@ -59,10 +58,6 @@
 return (new Config())
     ->setRiskyAllowed(true)
     ->setRules([
-        '@PHP71Migration' => true,
-        '@PHP71Migration:risky' => true,
-        '@PHPUnit60Migration:risky' => true,
-        '@PHPUnit75Migration:risky' => true,
         '@Symfony' => true,
         '@Symfony:risky' => true,
         'blank_line_before_statement' => [
diff --git a/Makefile b/Makefile
index dc07ef5..cec7399 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ help:
 
 # PHP CS Fixer
 PHP_CS_FIXER=./.tools/php-cs-fixer
-PHP_CS_FIXER_URL="https://github.com/FriendsOfPHP/PHP-CS-Fixer/releases/download/v3.35.1/php-cs-fixer.phar"
+PHP_CS_FIXER_URL="https://github.com/FriendsOfPHP/PHP-CS-Fixer/releases/download/v3.95.1/php-cs-fixer.phar"
 
 # PHPUnit
 PHPUNIT=vendor/bin/phpunit
diff --git a/src/CodeceptionAdapter.php b/src/CodeceptionAdapter.php
index e054f02..f357da1 100644
--- a/src/CodeceptionAdapter.php
+++ b/src/CodeceptionAdapter.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\TestFramework\Codeception;
 
 use function array_filter;
diff --git a/src/CodeceptionAdapterFactory.php b/src/CodeceptionAdapterFactory.php
index a4c095f..dc6568f 100644
--- a/src/CodeceptionAdapterFactory.php
+++ b/src/CodeceptionAdapterFactory.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\TestFramework\Codeception;
 
 use Infection\AbstractTestFramework\TestFrameworkAdapter;
diff --git a/src/CodeceptionConfigParseException.php b/src/CodeceptionConfigParseException.php
index cfa27eb..694f9ea 100644
--- a/src/CodeceptionConfigParseException.php
+++ b/src/CodeceptionConfigParseException.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\TestFramework\Codeception;
 
 use Exception;
diff --git a/src/CommandLineBuilder.php b/src/CommandLineBuilder.php
index 8889fe0..d4e5db1 100644
--- a/src/CommandLineBuilder.php
+++ b/src/CommandLineBuilder.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\TestFramework\Codeception;
 
 use function array_filter;
diff --git a/src/Coverage/JUnitTestCaseSorter.php b/src/Coverage/JUnitTestCaseSorter.php
index 869d3dd..f35d71e 100644
--- a/src/Coverage/JUnitTestCaseSorter.php
+++ b/src/Coverage/JUnitTestCaseSorter.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\TestFramework\Codeception\Coverage;
 
 use function array_map;
diff --git a/src/Stringifier.php b/src/Stringifier.php
index 48fad21..9675b80 100644
--- a/src/Stringifier.php
+++ b/src/Stringifier.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\TestFramework\Codeception;
 
 use function implode;
diff --git a/src/VersionParser.php b/src/VersionParser.php
index 00d9a4f..60178bc 100644
--- a/src/VersionParser.php
+++ b/src/VersionParser.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\TestFramework\Codeception;
 
 use Infection\AbstractTestFramework\InvalidVersion;
diff --git a/tests/phpunit/Adapter/CodeceptionAdapterFactoryTest.php b/tests/phpunit/Adapter/CodeceptionAdapterFactoryTest.php
index cdf90bc..7a6fdef 100644
--- a/tests/phpunit/Adapter/CodeceptionAdapterFactoryTest.php
+++ b/tests/phpunit/Adapter/CodeceptionAdapterFactoryTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\Tests\TestFramework\Codeception\Adapter;
 
 use Infection\TestFramework\Codeception\CodeceptionAdapter;
diff --git a/tests/phpunit/Adapter/CodeceptionAdapterTest.php b/tests/phpunit/Adapter/CodeceptionAdapterTest.php
index e735e01..cf16e7f 100644
--- a/tests/phpunit/Adapter/CodeceptionAdapterTest.php
+++ b/tests/phpunit/Adapter/CodeceptionAdapterTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\Tests\TestFramework\Codeception\Adapter;
 
 use function array_merge;
diff --git a/tests/phpunit/Adapter/CodeceptionConfigParseExceptionTest.php b/tests/phpunit/Adapter/CodeceptionConfigParseExceptionTest.php
index a96a57d..5450305 100644
--- a/tests/phpunit/Adapter/CodeceptionConfigParseExceptionTest.php
+++ b/tests/phpunit/Adapter/CodeceptionConfigParseExceptionTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\Tests\TestFramework\Codeception\Adapter;
 
 use Infection\TestFramework\Codeception\CodeceptionConfigParseException;
diff --git a/tests/phpunit/Adapter/Coverage/JUnitTestCaseSorterTest.php b/tests/phpunit/Adapter/Coverage/JUnitTestCaseSorterTest.php
index d86c1db..22cc4bc 100644
--- a/tests/phpunit/Adapter/Coverage/JUnitTestCaseSorterTest.php
+++ b/tests/phpunit/Adapter/Coverage/JUnitTestCaseSorterTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\Tests\TestFramework\Codeception\Adapter\Coverage;
 
 use Infection\AbstractTestFramework\Coverage\TestLocation;
diff --git a/tests/phpunit/Adapter/StringifierTest.php b/tests/phpunit/Adapter/StringifierTest.php
index 86558a0..14028f2 100644
--- a/tests/phpunit/Adapter/StringifierTest.php
+++ b/tests/phpunit/Adapter/StringifierTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\Tests\TestFramework\Codeception\Adapter;
 
 use Generator;
diff --git a/tests/phpunit/Adapter/VersionParserTest.php b/tests/phpunit/Adapter/VersionParserTest.php
index 7166db1..a8f2175 100644
--- a/tests/phpunit/Adapter/VersionParserTest.php
+++ b/tests/phpunit/Adapter/VersionParserTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\Tests\TestFramework\Codeception\Adapter;
 
 use Infection\AbstractTestFramework\InvalidVersion;
diff --git a/tests/phpunit/FileSystem/FileSystemTestCase.php b/tests/phpunit/FileSystem/FileSystemTestCase.php
index 6da1bfa..44b1af7 100644
--- a/tests/phpunit/FileSystem/FileSystemTestCase.php
+++ b/tests/phpunit/FileSystem/FileSystemTestCase.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 /*
  * This file is part of the box project.
  *
diff --git a/tests/phpunit/Helpers.php b/tests/phpunit/Helpers.php
index d43ebde..95f634b 100644
--- a/tests/phpunit/Helpers.php
+++ b/tests/phpunit/Helpers.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This code is licensed under the BSD 3-Clause License.
  *
@@ -31,8 +32,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-declare(strict_types=1);
-
 namespace Infection\Tests\TestFramework\Codeception;
 
 use const DIRECTORY_SEPARATOR;