diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index c13256e..80b4e00 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -1,22 +1,69 @@
 <?php
 
-$header = <<<EOM
-This file is part of the TYPO3 project.
-
-(c) 2019-2022 Benni Mack
-              Simon Gilli
+$config = \TYPO3\CodingStandards\CsFixerConfig::create();
+$config
+    ->setHeader(
+        <<<EOM
+        This file is part of the TYPO3 project.
 
-For the full copyright and license information, please view
-the LICENSE file that was distributed with this source code.
+        (c) 2019-2022 Benni Mack
+                      Simon Gilli
 
-The TYPO3 project - inspiring people to share!
-EOM;
+        For the full copyright and license information, please view
+        the LICENSE file that was distributed with this source code.
 
-$config = \TYPO3\CodingStandards\CsFixerConfig::create();
-$config
-    ->setHeader($header, true)
+        The TYPO3 project - inspiring people to share!
+        EOM,
+        true
+    )
+    ->addRules([
+        '@PER:risky' => true,
+        '@PHP80Migration:risky' => true,
+        '@PHP81Migration' => true,
+        'declare_strict_types' => true,
+        'fully_qualified_strict_types' => true,
+        'global_namespace_import' => [
+            'import_classes' => true,
+            'import_constants' => false,
+            'import_functions' => false,
+        ],
+        'no_unneeded_import_alias' => true,
+        'ordered_imports' => [
+            'imports_order' => ['class', 'function', 'const'],
+            'sort_algorithm' => 'alpha',
+        ],
+        'phpdoc_align' => true,
+        'phpdoc_annotation_without_dot' => true,
+        'phpdoc_indent' => true,
+        'phpdoc_inline_tag_normalizer' => true,
+        'phpdoc_line_span' => true,
+        'phpdoc_no_useless_inheritdoc' => true,
+        'phpdoc_order' => true,
+        'phpdoc_order_by_value' => true,
+        'phpdoc_separation' => true,
+        'phpdoc_single_line_var_spacing' => true,
+        'phpdoc_summary' => true,
+        'phpdoc_tag_casing' => true,
+        'phpdoc_tag_type' => true,
+        'phpdoc_to_comment' => [
+            'ignored_tags' => [
+                'phpstan-ignore-line',
+                'phpstan-ignore-next-line',
+                'todo',
+            ],
+        ],
+        'phpdoc_trim_consecutive_blank_line_separation' => true,
+        'phpdoc_types_order' => [
+            'null_adjustment' => 'always_last',
+            'sort_algorithm' => 'alpha',
+        ],
+        'phpdoc_var_annotation_correct_order' => true,
+        'phpdoc_var_without_name' => true,
+        'self_accessor' => true,
+    ])
     ->getFinder()
     ->exclude('templates')
+    ->exclude('tests/Unit/Fixtures')
     ->in(__DIR__)
 ;
 
diff --git a/rector.php b/rector.php
index ae56a8e..565cac6 100644
--- a/rector.php
+++ b/rector.php
@@ -41,7 +41,7 @@
 
     // define sets of rules
     $rectorConfig->sets([
-        LevelSetList::UP_TO_PHP_82,
+        LevelSetList::UP_TO_PHP_81,
         DowngradeLevelSetList::DOWN_TO_PHP_81,
         SetList::CODE_QUALITY,
         SetList::CODING_STYLE,
diff --git a/src/Console/Application.php b/src/Console/Application.php
index aa46082..3e381fc 100644
--- a/src/Console/Application.php
+++ b/src/Console/Application.php
@@ -36,7 +36,7 @@ final class Application extends BaseApplication
     public const VERSION = '0.8.0-DEV';
 
     /**
-     * getcwd() equivalent which always returns a string
+     * getcwd() equivalent which always returns a string.
      *
      * @throws RuntimeException
      */
diff --git a/src/Console/Command/AbstractSetupCommand.php b/src/Console/Command/AbstractSetupCommand.php
index 19148b6..7880232 100644
--- a/src/Console/Command/AbstractSetupCommand.php
+++ b/src/Console/Command/AbstractSetupCommand.php
@@ -28,7 +28,7 @@
 abstract class AbstractSetupCommand extends Command
 {
     /**
-     * @var Setup $setup
+     * @var Setup
      */
     protected $setup;
 
diff --git a/src/Console/Command/TypeTrait.php b/src/Console/Command/TypeTrait.php
index 623f260..4dbc658 100644
--- a/src/Console/Command/TypeTrait.php
+++ b/src/Console/Command/TypeTrait.php
@@ -16,6 +16,7 @@
 
 namespace TYPO3\CodingStandards\Console\Command;
 
+use RuntimeException;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -39,6 +40,9 @@ protected function configureBefore(): void
         ));
     }
 
+    /**
+     * @throws RuntimeException
+     */
     private function getType(InputInterface $input): string
     {
         if ($this->type === '') {
@@ -49,17 +53,17 @@ private function getType(InputInterface $input): string
 
                 $composerManifest = $this->getProjectDir() . '/composer.json';
                 if (!file_exists($composerManifest)) {
-                    throw new \RuntimeException(sprintf($composerManifestError, 'found'));
+                    throw new RuntimeException(sprintf($composerManifestError, 'found'));
                 }
 
                 $composerManifest = \file_get_contents($composerManifest);
                 if ($composerManifest === false) {
-                    throw new \RuntimeException(sprintf($composerManifestError, 'read')); // @codeCoverageIgnore
+                    throw new RuntimeException(sprintf($composerManifestError, 'read')); // @codeCoverageIgnore
                 }
 
                 $composerManifest = \json_decode($composerManifest, true, 512, 0);
                 if ($composerManifest === false || !is_array($composerManifest)) {
-                    throw new \RuntimeException(sprintf($composerManifestError, 'decoded'));
+                    throw new RuntimeException(sprintf($composerManifestError, 'decoded'));
                 }
 
                 if (
diff --git a/src/CsFixerConfig.php b/src/CsFixerConfig.php
index 85f4080..7abce88 100644
--- a/src/CsFixerConfig.php
+++ b/src/CsFixerConfig.php
@@ -24,17 +24,17 @@ class CsFixerConfig extends Config implements CsFixerConfigInterface
      * @var string
      */
     protected static $defaultHeader = <<<EOF
-{header}
+        {header}
 
-It is free software; you can redistribute it and/or modify it under
-the terms of the GNU General Public License, either version 2
-of the License, or any later version.
+        It is free software; you can redistribute it and/or modify it under
+        the terms of the GNU General Public License, either version 2
+        of the License, or any later version.
 
-For the full copyright and license information, please read the
-LICENSE.txt file that was distributed with this source code.
+        For the full copyright and license information, please read the
+        LICENSE.txt file that was distributed with this source code.
 
-The TYPO3 project - inspiring people to share!
-EOF;
+        The TYPO3 project - inspiring people to share!
+        EOF;
 
     /**
      * @var array<string, array<string, mixed>|bool>
diff --git a/src/Setup.php b/src/Setup.php
index 08af348..10e57d9 100644
--- a/src/Setup.php
+++ b/src/Setup.php
@@ -16,6 +16,7 @@
 
 namespace TYPO3\CodingStandards;
 
+use RuntimeException;
 use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Output\NullOutput;
 use Symfony\Component\Console\Style\StyleInterface;
@@ -59,6 +60,9 @@ final class Setup
 
     private readonly StyleInterface $style;
 
+    /**
+     * @throws RuntimeException
+     */
     public function __construct(string $targetDir, StyleInterface $style = null)
     {
         if ($targetDir === '') {
@@ -66,7 +70,7 @@ public function __construct(string $targetDir, StyleInterface $style = null)
         }
 
         if (!\is_dir($targetDir)) {
-            throw new \RuntimeException(sprintf("Target directory '%s' does not exist.", $targetDir));
+            throw new RuntimeException(sprintf("Target directory '%s' does not exist.", $targetDir));
         }
 
         // Normalize separators on Windows
@@ -109,10 +113,13 @@ public function forExtension(bool $force): int
         return $result ? 0 : 1;
     }
 
+    /**
+     * @throws RuntimeException
+     */
     public function copyPhpCsFixerConfig(bool $force, string $type): bool
     {
         if (!in_array($type, self::VALID_TYPES, true)) {
-            throw new \RuntimeException(sprintf('Invalid type (%s) specified.', $type));
+            throw new RuntimeException(sprintf('Invalid type (%s) specified.', $type));
         }
 
         $targetFile = '.php-cs-fixer.dist.php';
diff --git a/tests/Console/Style/SimpleStyle.php b/tests/Console/Style/SimpleStyle.php
index 85f2816..e2d393a 100644
--- a/tests/Console/Style/SimpleStyle.php
+++ b/tests/Console/Style/SimpleStyle.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * This file is part of the TYPO3 project.
  *
@@ -61,14 +63,14 @@ public function __construct(InputInterface $input, OutputInterface $output)
     /**
      * Formats a message as a block of text.
      *
-     * @param string|array $messages The message to write in the block
+     * @param array|string $messages The message to write in the block
      * @param string|null  $type     The block type (added in [] on first line)
      * @param string|null  $style    The style to apply to the whole block
      * @param string       $prefix   The prefix for the block
      * @param bool         $padding  Whether to add vertical padding
      * @param bool         $escape   Whether to escape the message
      */
-    public function block($messages, $type = null, $style = null, $prefix = ' ', $padding = false, $escape = true)
+    public function block($messages, $type = null, $style = null, $prefix = ' ', $padding = false, $escape = true): void
     {
         $messages = \is_array($messages) ? array_values($messages) : [$messages];
 
@@ -78,7 +80,7 @@ public function block($messages, $type = null, $style = null, $prefix = ' ', $pa
     /**
      * @inheritDoc
      */
-    public function title($message)
+    public function title($message): void
     {
         $this->writeln([
             sprintf('<comment>%s</>', OutputFormatter::escapeTrailingBackslash($message)),
@@ -88,7 +90,7 @@ public function title($message)
     /**
      * @inheritDoc
      */
-    public function section($message)
+    public function section($message): void
     {
         $this->writeln([
             sprintf('<comment>%s</>', OutputFormatter::escapeTrailingBackslash($message)),
@@ -98,11 +100,9 @@ public function section($message)
     /**
      * @inheritDoc
      */
-    public function listing(array $elements)
+    public function listing(array $elements): void
     {
-        $elements = array_map(function ($element) {
-            return sprintf(' * %s', $element);
-        }, $elements);
+        $elements = array_map(fn ($element) => sprintf(' * %s', $element), $elements);
 
         $this->writeln($elements);
     }
@@ -110,7 +110,7 @@ public function listing(array $elements)
     /**
      * @inheritDoc
      */
-    public function text($message)
+    public function text($message): void
     {
         $messages = \is_array($message) ? array_values($message) : [$message];
         foreach ($messages as $message) {
@@ -121,9 +121,9 @@ public function text($message)
     /**
      * Formats a command comment.
      *
-     * @param string|array $message
+     * @param array|string $message
      */
-    public function comment($message)
+    public function comment($message): void
     {
         $this->block($message, null, null, '<fg=default;bg=default> // </>', false, false);
     }
@@ -131,7 +131,7 @@ public function comment($message)
     /**
      * @inheritDoc
      */
-    public function success($message)
+    public function success($message): void
     {
         $this->block($message, 'OK', 'fg=black;bg=green', ' ', true);
     }
@@ -139,7 +139,7 @@ public function success($message)
     /**
      * @inheritDoc
      */
-    public function error($message)
+    public function error($message): void
     {
         $this->block($message, 'ERROR', 'fg=white;bg=red', ' ', true);
     }
@@ -147,7 +147,7 @@ public function error($message)
     /**
      * @inheritDoc
      */
-    public function warning($message)
+    public function warning($message): void
     {
         $this->block($message, 'WARNING', 'fg=black;bg=yellow', ' ', true);
     }
@@ -155,7 +155,7 @@ public function warning($message)
     /**
      * @inheritDoc
      */
-    public function note($message)
+    public function note($message): void
     {
         $this->block($message, 'NOTE', 'fg=yellow', ' ! ');
     }
@@ -163,7 +163,7 @@ public function note($message)
     /**
      * @inheritDoc
      */
-    public function caution($message)
+    public function caution($message): void
     {
         $this->block($message, 'CAUTION', 'fg=white;bg=red', ' ! ', true);
     }
@@ -171,7 +171,7 @@ public function caution($message)
     /**
      * @inheritDoc
      */
-    public function table(array $headers, array $rows)
+    public function table(array $headers, array $rows): void
     {
         $style = clone Table::getStyleDefinition('symfony-style-guide');
         $style->setCellHeaderFormat('<info>%s</info>');
@@ -188,7 +188,7 @@ public function table(array $headers, array $rows)
     /**
      * Formats a horizontal table.
      */
-    public function horizontalTable(array $headers, array $rows)
+    public function horizontalTable(array $headers, array $rows): void
     {
         $style = clone Table::getStyleDefinition('symfony-style-guide');
         $style->setCellHeaderFormat('<info>%s</info>');
@@ -211,9 +211,9 @@ public function horizontalTable(array $headers, array $rows)
      * * ['key' => 'value']
      * * new TableSeparator()
      *
-     * @param string|array|TableSeparator ...$list
+     * @param array|string|TableSeparator ...$list
      */
-    public function definitionList(...$list)
+    public function definitionList(...$list): void
     {
         $style = clone Table::getStyleDefinition('symfony-style-guide');
         $style->setCellHeaderFormat('<info>%s</info>');
@@ -296,7 +296,7 @@ public function choice($question, array $choices, $default = null)
     /**
      * @inheritDoc
      */
-    public function progressStart($max = 0)
+    public function progressStart($max = 0): void
     {
         $this->progressBar = $this->createProgressBar($max);
         $this->progressBar->start();
@@ -305,7 +305,7 @@ public function progressStart($max = 0)
     /**
      * @inheritDoc
      */
-    public function progressAdvance($step = 1)
+    public function progressAdvance($step = 1): void
     {
         $this->getProgressBar()->advance($step);
     }
@@ -313,7 +313,7 @@ public function progressAdvance($step = 1)
     /**
      * @inheritDoc
      */
-    public function progressFinish()
+    public function progressFinish(): void
     {
         $this->getProgressBar()->finish();
         $this->newLine(2);
@@ -362,7 +362,7 @@ public function askQuestion(Question $question)
     /**
      * @inheritDoc
      */
-    public function writeln($messages, $type = self::OUTPUT_NORMAL)
+    public function writeln($messages, $type = self::OUTPUT_NORMAL): void
     {
         if (!is_iterable($messages)) {
             $messages = [$messages];
@@ -377,7 +377,7 @@ public function writeln($messages, $type = self::OUTPUT_NORMAL)
     /**
      * @inheritDoc
      */
-    public function write($messages, $newline = false, $type = self::OUTPUT_NORMAL)
+    public function write($messages, $newline = false, $type = self::OUTPUT_NORMAL): void
     {
         if (!is_iterable($messages)) {
             $messages = [$messages];
@@ -392,7 +392,7 @@ public function write($messages, $newline = false, $type = self::OUTPUT_NORMAL)
     /**
      * @inheritDoc
      */
-    public function newLine($count = 1)
+    public function newLine($count = 1): void
     {
         parent::newLine($count);
         $this->bufferedOutput->write(str_repeat("\n", $count));
diff --git a/tests/Unit/Console/ApplicationTest.php b/tests/Unit/Console/ApplicationTest.php
index 05acd82..68b2eee 100644
--- a/tests/Unit/Console/ApplicationTest.php
+++ b/tests/Unit/Console/ApplicationTest.php
@@ -16,6 +16,7 @@
 
 namespace TYPO3\CodingStandards\Tests\Unit\Console;
 
+use RuntimeException;
 use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Tester\ApplicationTester;
 use TYPO3\CodingStandards\Console\Application;
@@ -60,7 +61,7 @@ public function testGetTargetDir(): void
 
     public function testGetTargetDirThrowsOnInvalidPath(): void
     {
-        self::expectException(\RuntimeException::class);
+        self::expectException(RuntimeException::class);
         self::expectExceptionMessageMatches('#Invalid target directory specified, /.*/invalid-target does not exist.#');
 
         self::getTestPath();
diff --git a/tests/Unit/Console/Command/AbstractSetupCommandTest.php b/tests/Unit/Console/Command/AbstractSetupCommandTest.php
index bec9f95..252525f 100644
--- a/tests/Unit/Console/Command/AbstractSetupCommandTest.php
+++ b/tests/Unit/Console/Command/AbstractSetupCommandTest.php
@@ -16,6 +16,7 @@
 
 namespace TYPO3\CodingStandards\Tests\Unit\Console\Command;
 
+use RuntimeException;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\ArrayInput;
 use TYPO3\CodingStandards\Console\Command\AbstractSetupCommand;
@@ -50,7 +51,7 @@ public function testThrowsOnInvalidPath(): void
 
         $commandTester = $this->getCommandTester('');
 
-        self::expectException(\RuntimeException::class);
+        self::expectException(RuntimeException::class);
         self::expectExceptionMessageMatches('#.+(invalid-path).+#');
 
         $commandTester->execute($this->getInput($testPath . '/invalid-path'));
diff --git a/tests/Unit/Console/Command/AbstractSetupCommandTestImplementation.php b/tests/Unit/Console/Command/AbstractSetupCommandTestImplementation.php
index 7026f85..5a1398c 100644
--- a/tests/Unit/Console/Command/AbstractSetupCommandTestImplementation.php
+++ b/tests/Unit/Console/Command/AbstractSetupCommandTestImplementation.php
@@ -25,13 +25,6 @@
  */
 final class AbstractSetupCommandTestImplementation extends AbstractSetupCommand
 {
-    //protected static $defaultName = 'setup:editor-config';
-
-    /**
-     * @ var string
-     */
-    //protected static $defaultDescription = 'Setting up the TYPO3 editorconfig ruleset';
-
     protected function executeSetup(InputInterface $input, OutputInterface $output): int
     {
         //throw new \LogicException('Call to executeSetup()', 1637417318);
diff --git a/tests/Unit/Console/Command/SetupCommandTest.php b/tests/Unit/Console/Command/SetupCommandTest.php
index 8274ae8..062ba7b 100644
--- a/tests/Unit/Console/Command/SetupCommandTest.php
+++ b/tests/Unit/Console/Command/SetupCommandTest.php
@@ -16,6 +16,8 @@
 
 namespace TYPO3\CodingStandards\Tests\Unit\Console\Command;
 
+use Generator;
+use RuntimeException;
 use TYPO3\CodingStandards\Console\Command\SetupCommand;
 use TYPO3\CodingStandards\Setup;
 
@@ -29,9 +31,9 @@ public function testTypeArgument(string $type): void
     }
 
     /**
-     * @return \Generator<string, array<string, string>>
+     * @return Generator<string, array<string, string>>
      */
-    public static function typeDataProvider(): \Generator
+    public static function typeDataProvider(): Generator
     {
         foreach (Setup::VALID_TYPES as $type) {
             yield $type => [
@@ -46,7 +48,7 @@ public function testMissingTypeThrows(): void
 
         $commandTester = $this->getCommandTester('setup');
 
-        self::expectException(\RuntimeException::class);
+        self::expectException(RuntimeException::class);
         self::expectExceptionMessageMatches('#.+(type).+#');
 
         $commandTester->execute($this->getInput($testPath));
@@ -60,16 +62,16 @@ public function testInvalidComposerManifestThrows(): void
 
         $commandTester = $this->getCommandTester('setup');
 
-        self::expectException(\RuntimeException::class);
+        self::expectException(RuntimeException::class);
         self::expectExceptionMessageMatches('#.+(type).+#');
 
         $commandTester->execute($this->getInput($testPath));
     }
 
     /**
-     * @param array<string, string> $existingFiles
+     * @param array<string, string>                    $existingFiles
      * @param array<string, array<int, string>|string> $input
-     * @param array<string, bool|string> $expectedFiles
+     * @param array<string, bool|string>               $expectedFiles
      */
     #[\PHPUnit\Framework\Attributes\DataProvider('setupDataProvider')]
     public function testSetup(
@@ -102,9 +104,16 @@ public function testSetup(
     }
 
     /**
-     * @return \Generator<string, array{existingFiles: array<string, string>, targetDir: string, force: bool, input: array<string, array<int, string>|string>, expectedOutput: string, expectedFiles: array<string, bool|string>}>
+     * @return Generator<string, array{
+     *   existingFiles: array<string, string>,
+     *   targetDir: string,
+     *   force: bool,
+     *   input: array<string, array<int, string>|string>,
+     *   expectedOutput: string,
+     *   expectedFiles: array<string, bool|string>
+     * }>
      */
-    public static function setupDataProvider(): \Generator
+    public static function setupDataProvider(): Generator
     {
         yield 'auto-detect extension from type' => [
             'existingFiles' => [
diff --git a/tests/Unit/Console/Command/SetupCommandTestCase.php b/tests/Unit/Console/Command/SetupCommandTestCase.php
index b0fc82f..0365acb 100644
--- a/tests/Unit/Console/Command/SetupCommandTestCase.php
+++ b/tests/Unit/Console/Command/SetupCommandTestCase.php
@@ -19,8 +19,9 @@
 class SetupCommandTestCase extends CommandTestCase
 {
     /**
-     * @param array<string, string|string[]|bool|null> $input
-     * @return array<string, string|string[]|bool|null>
+     * @param array<string, bool|string|string[]|null> $input
+     *
+     * @return array<string, bool|string|string[]|null>
      */
     protected function getInput(string $testPath, bool $force = false, array $input = []): array
     {
@@ -32,7 +33,7 @@ protected function getInput(string $testPath, bool $force = false, array $input
     }
 
     /**
-     * @param array<string, string|string[]|bool|null> $input
+     * @param array<string, bool|string|string[]|null> $input
      */
     protected function assertExecuteScenario(string $testPath, string $commandName, array $input = []): void
     {
diff --git a/tests/Unit/Console/Command/UpdateCommandTestCase.php b/tests/Unit/Console/Command/UpdateCommandTestCase.php
index 3ca1354..111fb0f 100644
--- a/tests/Unit/Console/Command/UpdateCommandTestCase.php
+++ b/tests/Unit/Console/Command/UpdateCommandTestCase.php
@@ -19,8 +19,9 @@
 class UpdateCommandTestCase extends CommandTestCase
 {
     /**
-     * @param array<string, string|string[]|bool|null> $input
-     * @return array<string, string|string[]|bool|null>
+     * @param array<string, bool|string|string[]|null> $input
+     *
+     * @return array<string, bool|string|string[]|null>
      */
     protected function getInput(string $testPath, array $input = []): array
     {
@@ -31,7 +32,7 @@ protected function getInput(string $testPath, array $input = []): array
     }
 
     /**
-     * @param array<string, string|string[]|bool|null> $input
+     * @param array<string, bool|string|string[]|null> $input
      */
     protected function assertExecuteScenario(string $testPath, string $commandName, array $input = []): void
     {
diff --git a/tests/Unit/SetupTest.php b/tests/Unit/SetupTest.php
index 6a63fb1..17f8d3d 100644
--- a/tests/Unit/SetupTest.php
+++ b/tests/Unit/SetupTest.php
@@ -16,6 +16,8 @@
 
 namespace TYPO3\CodingStandards\Tests\Unit;
 
+use Generator;
+use RuntimeException;
 use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Output\BufferedOutput;
 use TYPO3\CodingStandards\Setup;
@@ -74,8 +76,8 @@ private function calculateOutput(array $expectedOutput, string $type): string
     }
 
     /**
-     * @param array<string, string> $existingFiles
-     * @param array<int, string> $expectedOutput
+     * @param array<string, string>      $existingFiles
+     * @param array<int, string>         $expectedOutput
      * @param array<string, bool|string> $expectedFiles
      */
     private function assertScenario(
@@ -119,8 +121,8 @@ private function assertScenario(
     }
 
     /**
-     * @param array<string, string> $existingFiles
-     * @param array<int, string> $expectedOutput
+     * @param array<string, string>      $existingFiles
+     * @param array<int, string>         $expectedOutput
      * @param array<string, bool|string> $expectedFiles
      */
     #[\PHPUnit\Framework\Attributes\DataProvider('scenariosProvider')]
@@ -135,8 +137,8 @@ public function testForProjectScenarios(
     }
 
     /**
-     * @param array<string, string> $existingFiles
-     * @param array<int, string> $expectedOutput
+     * @param array<string, string>      $existingFiles
+     * @param array<int, string>         $expectedOutput
      * @param array<string, bool|string> $expectedFiles
      */
     #[\PHPUnit\Framework\Attributes\DataProvider('scenariosProvider')]
@@ -151,7 +153,7 @@ public function testForExtensionScenarios(
     }
 
     /**
-     * @return \Generator<string, array{
+     * @return Generator<string, array{
      *   existingFiles: array<string, string>,
      *   force: bool,
      *   expectedResult: int,
@@ -159,7 +161,7 @@ public function testForExtensionScenarios(
      *   expectedFiles: array<string, bool|string>
      * }>
      */
-    public static function scenariosProvider(): \Generator
+    public static function scenariosProvider(): Generator
     {
         yield 'all files are created' => [
             'existingFiles' => [],
@@ -337,9 +339,9 @@ public function testCopyPhpCsFixerConfig(string $type): void
     }
 
     /**
-     * @return \Generator<string, array<string, string>>
+     * @return Generator<string, array<string, string>>
      */
-    public static function typeDataProvider(): \Generator
+    public static function typeDataProvider(): Generator
     {
         foreach (Setup::VALID_TYPES as $type) {
             yield $type => [
@@ -352,7 +354,7 @@ public function testInvalidPathThrows(): void
     {
         $testPath = self::getTestPath() . '/invalid-path';
 
-        self::expectException(\RuntimeException::class);
+        self::expectException(RuntimeException::class);
         self::expectExceptionMessageMatches('#.+(invalid-path).+#');
 
         new Setup($testPath);
@@ -375,7 +377,7 @@ public function testIoIsCreated(): void
 
     public function testInvalidTypeThrows(): void
     {
-        self::expectException(\RuntimeException::class);
+        self::expectException(RuntimeException::class);
         self::expectExceptionMessageMatches('#.+(type).+#');
 
         $setup = new Setup(self::getTestPath());
diff --git a/tests/Unit/Smoke/InstallViaComposerTest.php b/tests/Unit/Smoke/InstallViaComposerTest.php
index 374ebd5..c39f1ac 100644
--- a/tests/Unit/Smoke/InstallViaComposerTest.php
+++ b/tests/Unit/Smoke/InstallViaComposerTest.php
@@ -17,6 +17,7 @@
 namespace TYPO3\CodingStandards\Tests\Unit\Smoke;
 
 use Keradus\CliExecutor\CommandExecutor;
+use RuntimeException;
 use TYPO3\CodingStandards\Console\Application;
 use TYPO3\CodingStandards\Tests\Unit\TestCase;
 
@@ -53,19 +54,19 @@ public static function setUpBeforeClass(): void
 
         try {
             CommandExecutor::create('php --version', __DIR__)->getResult();
-        } catch (\RuntimeException $runtimeException) {
+        } catch (RuntimeException $runtimeException) {
             self::markTestIncomplete('Missing `php` env script. Details:' . "\n" . $runtimeException->getMessage());
         }
 
         try {
             CommandExecutor::create('composer --version', __DIR__)->getResult();
-        } catch (\RuntimeException $runtimeException) {
+        } catch (RuntimeException $runtimeException) {
             self::markTestIncomplete('Missing `composer` env script. Details:' . "\n" . $runtimeException->getMessage());
         }
 
         try {
             CommandExecutor::create('composer check', self::getRootPath())->getResult();
-        } catch (\RuntimeException $runtimeException) {
+        } catch (RuntimeException $runtimeException) {
             if (\getenv('EXPERIMENTAL') !== 'true') {
                 self::markTestIncomplete('Composer check failed. Details:' . "\n" . $runtimeException->getMessage());
             }
diff --git a/tests/Unit/TestCase.php b/tests/Unit/TestCase.php
index 753aad8..4ee2b7d 100644
--- a/tests/Unit/TestCase.php
+++ b/tests/Unit/TestCase.php
@@ -17,6 +17,7 @@
 namespace TYPO3\CodingStandards\Tests\Unit;
 
 use PHPUnit\Framework\TestCase as BaseTestCase;
+use RuntimeException;
 use Symfony\Component\Filesystem\Filesystem;
 
 abstract class TestCase extends BaseTestCase
@@ -75,7 +76,7 @@ protected static function getFilename(string $filename, ?array $replacePairs = n
         return match ($prefix) {
             'TPL' => self::getTemplateFilename($filename),
             'FIX' => self::getFixtureFilename($filename),
-            default => throw new \RuntimeException(sprintf('Invalid prefix (%s).', $prefix), 1_636_451_407),
+            default => throw new RuntimeException(sprintf('Invalid prefix (%s).', $prefix), 1_636_451_407),
         };
     }