diff --git a/.github/SECURITY.md b/.github/SECURITY.md
new file mode 100644
index 00000000..dd7208fe
--- /dev/null
+++ b/.github/SECURITY.md
@@ -0,0 +1,17 @@
+# Security Policy
+
+## Supported Versions
+
+The following versions of `ergebnis/json-pointer` have active support:
+
+- `^3.2.0`
+
+## Unsupported Versions
+
+The following versions of `ergebnis/json-pointer` have reached their end of life:
+
+- `<3.2.0`
+
+## Reporting a Vulnerability
+
+If you believe that you have found a security vulnerability, please send an email to `am@localheinz.com`. Ensure to include all details required to understand the severity of the issue.
diff --git a/.github/settings.yml b/.github/settings.yml
index 9a516093..330195dc 100644
--- a/.github/settings.yml
+++ b/.github/settings.yml
@@ -82,6 +82,7 @@ repository:
   has_pages: false
   has_projects: false
   has_wiki: false
+  is_template: false
   name: "json-pointer"
   private: false
 
diff --git a/.github/workflows/integrate.yaml b/.github/workflows/integrate.yaml
index 3793c815..d66c7ae5 100644
--- a/.github/workflows/integrate.yaml
+++ b/.github/workflows/integrate.yaml
@@ -30,7 +30,7 @@ jobs:
         uses: "shivammathur/setup-php@2.25.4"
         with:
           coverage: "xdebug"
-          extensions: "none, ctype, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
+          extensions: "none, ctype, curl, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
           php-version: "${{ matrix.php-version }}"
 
       - name: "Set up problem matchers for PHP"
@@ -39,6 +39,9 @@ jobs:
       - name: "Set up problem matchers for phpunit/phpunit"
         run: "echo \"::add-matcher::${{ runner.tool_cache }}/phpunit.json\""
 
+      - name: "Validate composer.json and composer.lock"
+        run: "composer validate --ansi --strict"
+
       - name: "Determine composer cache directory"
         uses: "ergebnis/.github/actions/composer/determine-cache-directory@1.8.0"
 
@@ -93,7 +96,7 @@ jobs:
         uses: "shivammathur/setup-php@2.25.4"
         with:
           coverage: "none"
-          extensions: "none, ctype, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
+          extensions: "none, ctype, curl, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
           php-version: "${{ matrix.php-version }}"
 
       - name: "Set up problem matchers for PHP"
@@ -121,7 +124,7 @@ jobs:
         run: "composer normalize --ansi --dry-run"
 
       - name: "Create cache directory for friendsofphp/php-cs-fixer"
-        run: "mkdir -p .build/php-cs-fixer"
+        run: "mkdir -p .build/php-cs-fixer/"
 
       - name: "Cache cache directory for friendsofphp/php-cs-fixer"
         uses: "actions/cache@v3.3.1"
@@ -156,13 +159,16 @@ jobs:
         uses: "shivammathur/setup-php@2.25.4"
         with:
           coverage: "none"
-          extensions: "none, ctype, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
+          extensions: "none, ctype, curl, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
           php-version: "${{ matrix.php-version }}"
           tools: "phive"
 
       - name: "Set up problem matchers for PHP"
         run: "echo \"::add-matcher::${{ runner.tool_cache }}/php.json\""
 
+      - name: "Validate composer.json and composer.lock"
+        run: "composer validate --ansi --strict"
+
       - name: "Determine composer cache directory"
         uses: "ergebnis/.github/actions/composer/determine-cache-directory@1.8.0"
 
@@ -207,12 +213,15 @@ jobs:
         uses: "shivammathur/setup-php@2.25.4"
         with:
           coverage: "xdebug"
-          extensions: "none, ctype, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
+          extensions: "none, ctype, curl, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
           php-version: "${{ matrix.php-version }}"
 
       - name: "Set up problem matchers for PHP"
         run: "echo \"::add-matcher::${{ runner.tool_cache }}/php.json\""
 
+      - name: "Validate composer.json and composer.lock"
+        run: "composer validate --ansi --strict"
+
       - name: "Determine composer cache directory"
         uses: "ergebnis/.github/actions/composer/determine-cache-directory@1.8.0"
 
@@ -254,12 +263,15 @@ jobs:
         uses: "shivammathur/setup-php@2.25.4"
         with:
           coverage: "none"
-          extensions: "none, ctype, dom, intl, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
+          extensions: "none, ctype, curl, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
           php-version: "${{ matrix.php-version }}"
 
       - name: "Set up problem matchers for PHP"
         run: "echo \"::add-matcher::${{ runner.tool_cache }}/php.json\""
 
+      - name: "Validate composer.json and composer.lock"
+        run: "composer validate --ansi --strict"
+
       - name: "Determine composer cache directory"
         uses: "ergebnis/.github/actions/composer/determine-cache-directory@1.8.0"
 
@@ -276,7 +288,7 @@ jobs:
           dependencies: "${{ matrix.dependencies }}"
 
       - name: "Create cache directory for rector/rector"
-        run: "mkdir -p .build/rector"
+        run: "mkdir -p .build/rector/"
 
       - name: "Cache cache directory for rector/rector"
         uses: "actions/cache@v3.3.1"
@@ -311,7 +323,7 @@ jobs:
         uses: "shivammathur/setup-php@2.25.4"
         with:
           coverage: "none"
-          extensions: "none, ctype, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
+          extensions: "none, ctype, curl, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
           php-version: "${{ matrix.php-version }}"
 
       - name: "Set up problem matchers for PHP"
@@ -320,6 +332,21 @@ jobs:
       - name: "Validate composer.json and composer.lock"
         run: "composer validate --ansi --strict"
 
+      - name: "Determine composer cache directory"
+        uses: "ergebnis/.github/actions/composer/determine-cache-directory@1.8.0"
+
+      - name: "Cache dependencies installed with composer"
+        uses: "actions/cache@v3.3.1"
+        with:
+          path: "${{ env.COMPOSER_CACHE_DIR }}"
+          key: "php-${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-${{ hashFiles('composer.lock') }}"
+          restore-keys: "php-${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-"
+
+      - name: "Install ${{ matrix.dependencies }} dependencies with composer"
+        uses: "ergebnis/.github/actions/composer/install@1.8.0"
+        with:
+          dependencies: "${{ matrix.dependencies }}"
+
       - name: "Check installed packages for security vulnerability advisories"
         run: "composer audit --ansi"
 
@@ -350,6 +377,9 @@ jobs:
       - name: "Set up problem matchers for PHP"
         run: "echo \"::add-matcher::${{ runner.tool_cache }}/php.json\""
 
+      - name: "Validate composer.json and composer.lock"
+        run: "composer validate --ansi --strict"
+
       - name: "Determine composer cache directory"
         uses: "ergebnis/.github/actions/composer/determine-cache-directory@1.8.0"
 
@@ -366,7 +396,7 @@ jobs:
           dependencies: "${{ matrix.dependencies }}"
 
       - name: "Create cache directory for vimeo/psalm"
-        run: "mkdir -p .build/psalm"
+        run: "mkdir -p .build/psalm/"
 
       - name: "Run vimeo/psalm"
         run: "vendor/bin/psalm --config=psalm.xml --output-format=github --shepherd --show-info=false --stats --threads=4"
@@ -395,7 +425,7 @@ jobs:
         uses: "shivammathur/setup-php@2.25.4"
         with:
           coverage: "none"
-          extensions: "none, ctype, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
+          extensions: "none, ctype, curl, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
           php-version: "${{ matrix.php-version }}"
 
       - name: "Set up problem matchers for PHP"
@@ -404,6 +434,9 @@ jobs:
       - name: "Set up problem matchers for phpunit/phpunit"
         run: "echo \"::add-matcher::${{ runner.tool_cache }}/phpunit.json\""
 
+      - name: "Validate composer.json and composer.lock"
+        run: "composer validate --ansi --strict"
+
       - name: "Determine composer cache directory"
         uses: "ergebnis/.github/actions/composer/determine-cache-directory@1.8.0"
 
diff --git a/.github/workflows/renew.yaml b/.github/workflows/renew.yaml
index 84271082..b4f06703 100644
--- a/.github/workflows/renew.yaml
+++ b/.github/workflows/renew.yaml
@@ -30,7 +30,7 @@ jobs:
         uses: "shivammathur/setup-php@2.25.4"
         with:
           coverage: "none"
-          extensions: "none, ctype, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
+          extensions: "none, ctype, curl, dom, json, mbstring, phar, simplexml, tokenizer, xml, xmlwriter"
           php-version: "${{ matrix.php-version }}"
 
       - name: "Set up problem matchers for PHP"
diff --git a/.gitignore b/.gitignore
index c6b4dc9c..f1cf866a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 /.build/
-/.notes/
+/.note/
 /.phive/
 /vendor/
 !/.phive/phars.xml
diff --git a/.php-cs-fixer.php b/.php-cs-fixer.php
index 1e45a8c8..909f0d9f 100644
--- a/.php-cs-fixer.php
+++ b/.php-cs-fixer.php
@@ -34,11 +34,10 @@
     ->exclude([
         '.build/',
         '.github/',
-        '.notes/',
+        '.note/',
     ])
     ->ignoreDotFiles(false)
-    ->in(__DIR__)
-    ->name('.php-cs-fixer.php');
+    ->in(__DIR__);
 
 $config->setCacheFile(__DIR__ . '/.build/php-cs-fixer/.php-cs-fixer.cache');
 
diff --git a/.yamllint.yaml b/.yamllint.yaml
index b2129ac2..af99fe0f 100644
--- a/.yamllint.yaml
+++ b/.yamllint.yaml
@@ -2,7 +2,7 @@ extends: "default"
 
 ignore: |
   .build/
-  .notes/
+  .note/
   vendor/
 
 rules:
diff --git a/README.md b/README.md
index 516b295c..5dfb617b 100644
--- a/README.md
+++ b/README.md
@@ -322,6 +322,10 @@ Please have a look at [`CONTRIBUTING.md`](.github/CONTRIBUTING.md).
 
 Please have a look at [`CODE_OF_CONDUCT.md`](https://github.com/ergebnis/.github/blob/main/CODE_OF_CONDUCT.md).
 
+## Security Policy
+
+Please have a look at [`SECURITY.md`](.github/SECURITY.md).
+
 ## License
 
 This package is licensed using the MIT License.
diff --git a/composer.json b/composer.json
index ea981e10..b91667d5 100644
--- a/composer.json
+++ b/composer.json
@@ -27,6 +27,7 @@
     "ergebnis/data-provider": "^2.0.0",
     "ergebnis/license": "^2.1.0",
     "ergebnis/php-cs-fixer-config": "^5.10.0",
+    "ergebnis/phpunit-slow-test-detector": "^2.3.0",
     "fakerphp/faker": "^1.23.0",
     "infection/infection": "~0.27.0",
     "phpunit/phpunit": "^10.2.3",
diff --git a/composer.lock b/composer.lock
index 89bf0bb1..bdf0451f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "12ea4af4f574cb862e42c3b686b4e7bf",
+    "content-hash": "c78ecf6bfb5a4934a4b220327edd25b5",
     "packages": [],
     "packages-dev": [
         {
@@ -1235,6 +1235,74 @@
             },
             "time": "2023-06-28T09:15:01+00:00"
         },
+        {
+            "name": "ergebnis/phpunit-slow-test-detector",
+            "version": "2.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ergebnis/phpunit-slow-test-detector.git",
+                "reference": "ea03f0fb94a8ba8b2428d5dbbdcda3aa2f6b529a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/ergebnis/phpunit-slow-test-detector/zipball/ea03f0fb94a8ba8b2428d5dbbdcda3aa2f6b529a",
+                "reference": "ea03f0fb94a8ba8b2428d5dbbdcda3aa2f6b529a",
+                "shasum": ""
+            },
+            "require": {
+                "php": "~8.1.0 || ~8.2.0",
+                "phpunit/phpunit": "^10.1.3"
+            },
+            "require-dev": {
+                "ergebnis/composer-normalize": "^2.31.0",
+                "ergebnis/data-provider": "^1.3.0",
+                "ergebnis/license": "^2.1.0",
+                "ergebnis/php-cs-fixer-config": "^5.7.0",
+                "fakerphp/faker": "^1.22.0",
+                "psalm/plugin-phpunit": "~0.18.4",
+                "rector/rector": "~0.16.0",
+                "vimeo/psalm": "^5.12.0"
+            },
+            "suggest": {
+                "phpunit/phpunit": "^10.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "composer-normalize": {
+                    "indent-size": 2,
+                    "indent-style": "space"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Ergebnis\\PHPUnit\\SlowTestDetector\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Andreas Möller",
+                    "email": "am@localheinz.com"
+                }
+            ],
+            "description": "Provides facilities for detecting slow tests in phpunit/phpunit.",
+            "homepage": "https://github.com/ergebnis/phpunit-slow-test-detector",
+            "keywords": [
+                "detector",
+                "extension",
+                "phpunit",
+                "slow",
+                "test"
+            ],
+            "support": {
+                "issues": "https://github.com/ergebnis/phpunit-slow-test-detector/issues",
+                "source": "https://github.com/ergebnis/phpunit-slow-test-detector"
+            },
+            "time": "2023-05-30T17:23:26+00:00"
+        },
         {
             "name": "fakerphp/faker",
             "version": "v1.23.0",
diff --git a/psalm-baseline.xml b/psalm-baseline.xml
index adc507c6..4a8365f7 100644
--- a/psalm-baseline.xml
+++ b/psalm-baseline.xml
@@ -1,8 +1,23 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="5.9.0@8b9ad1eb9e8b7d3101f949291da2b9f7767cd163">
+<files psalm-version="5.13.1@086b94371304750d1c673315321a55d15fc59015">
   <file src="src/JsonPointer.php">
     <MixedPropertyTypeCoercion>
       <code>$referenceTokens</code>
     </MixedPropertyTypeCoercion>
   </file>
+  <file src="test/Unit/JsonPointerTest.php">
+    <PossiblyUnusedMethod>
+      <code>provideInvalidJsonStringValue</code>
+      <code>provideInvalidUriFragmentIdentifierStringValue</code>
+      <code>provideJsonPointerReferenceTokenAndExpectedJsonPointer</code>
+      <code>provideJsonStringValueUriFragmentIdentifierStringValueAndReferenceTokens</code>
+    </PossiblyUnusedMethod>
+  </file>
+  <file src="test/Unit/ReferenceTokenTest.php">
+    <PossiblyUnusedMethod>
+      <code>provideInvalidJsonStringValue</code>
+      <code>provideInvalidUriFragmentIdentifierStringValue</code>
+      <code>provideValueJsonStringValueAndUriFragmentIdentifierStringValue</code>
+    </PossiblyUnusedMethod>
+  </file>
 </files>
diff --git a/rector.php b/rector.php
index 545f96a9..4a8847ac 100644
--- a/rector.php
+++ b/rector.php
@@ -13,6 +13,7 @@
 
 use Rector\Config;
 use Rector\Core;
+use Rector\Php81;
 use Rector\PHPUnit;
 
 return static function (Config\RectorConfig $rectorConfig): void {
@@ -27,7 +28,11 @@
 
     $rectorConfig->phpVersion(Core\ValueObject\PhpVersion::PHP_81);
 
+    $rectorConfig->rules([
+        Php81\Rector\Property\ReadOnlyPropertyRector::class,
+    ]);
+
     $rectorConfig->sets([
-        PHPUnit\Set\PHPUnitSetList::PHPUNIT_90,
+        PHPUnit\Set\PHPUnitSetList::PHPUNIT_100,
     ]);
 };
diff --git a/src/JsonPointer.php b/src/JsonPointer.php
index 27e0deac..bf0897b4 100644
--- a/src/JsonPointer.php
+++ b/src/JsonPointer.php
@@ -23,7 +23,7 @@ final class JsonPointer
     /**
      * @var array<int, ReferenceToken>
      */
-    private array $referenceTokens;
+    private readonly array $referenceTokens;
 
     private function __construct(ReferenceToken ...$referenceTokens)
     {
diff --git a/src/ReferenceToken.php b/src/ReferenceToken.php
index 9725ae50..0bd00ba1 100644
--- a/src/ReferenceToken.php
+++ b/src/ReferenceToken.php
@@ -20,7 +20,7 @@
  */
 final class ReferenceToken
 {
-    private function __construct(private string $value)
+    private function __construct(private readonly string $value)
     {
     }
 
diff --git a/src/Specification.php b/src/Specification.php
index 79c42353..1132a69e 100644
--- a/src/Specification.php
+++ b/src/Specification.php
@@ -18,7 +18,7 @@ final class Specification
     /**
      * @param \Closure(JsonPointer):bool $closure
      */
-    private function __construct(private \Closure $closure)
+    private function __construct(private readonly \Closure $closure)
     {
     }
 
diff --git a/test/Unit/Exception/InvalidJsonPointerTest.php b/test/Unit/Exception/InvalidJsonPointerTest.php
index 1ca7a98d..d1f36a6b 100644
--- a/test/Unit/Exception/InvalidJsonPointerTest.php
+++ b/test/Unit/Exception/InvalidJsonPointerTest.php
@@ -17,11 +17,7 @@
 use Ergebnis\Json\Pointer\Test;
 use PHPUnit\Framework;
 
-/**
- * @internal
- *
- * @covers \Ergebnis\Json\Pointer\Exception\InvalidJsonPointer
- */
+#[Framework\Attributes\CoversClass(Exception\InvalidJsonPointer::class)]
 final class InvalidJsonPointerTest extends Framework\TestCase
 {
     use Test\Util\Helper;
diff --git a/test/Unit/Exception/InvalidReferenceTokenTest.php b/test/Unit/Exception/InvalidReferenceTokenTest.php
index 893a16cb..06d03e7f 100644
--- a/test/Unit/Exception/InvalidReferenceTokenTest.php
+++ b/test/Unit/Exception/InvalidReferenceTokenTest.php
@@ -17,11 +17,7 @@
 use Ergebnis\Json\Pointer\Test;
 use PHPUnit\Framework;
 
-/**
- * @internal
- *
- * @covers \Ergebnis\Json\Pointer\Exception\InvalidReferenceToken
- */
+#[Framework\Attributes\CoversClass(Exception\InvalidReferenceToken::class)]
 final class InvalidReferenceTokenTest extends Framework\TestCase
 {
     use Test\Util\Helper;
diff --git a/test/Unit/JsonPointerTest.php b/test/Unit/JsonPointerTest.php
index 639aee04..c01c4177 100644
--- a/test/Unit/JsonPointerTest.php
+++ b/test/Unit/JsonPointerTest.php
@@ -18,19 +18,12 @@
 use Ergebnis\Json\Pointer\ReferenceToken;
 use PHPUnit\Framework;
 
-/**
- * @internal
- *
- * @covers \Ergebnis\Json\Pointer\JsonPointer
- *
- * @uses \Ergebnis\Json\Pointer\Exception\InvalidJsonPointer
- * @uses \Ergebnis\Json\Pointer\ReferenceToken
- */
+#[Framework\Attributes\CoversClass(JsonPointer::class)]
+#[Framework\Attributes\UsesClass(Exception\InvalidJsonPointer::class)]
+#[Framework\Attributes\UsesClass(ReferenceToken::class)]
 final class JsonPointerTest extends Framework\TestCase
 {
-    /**
-     * @dataProvider provideInvalidJsonStringValue
-     */
+    #[Framework\Attributes\DataProvider('provideInvalidJsonStringValue')]
     public function testFromJsonStringRejectsInvalidValue(string $value): void
     {
         $this->expectException(Exception\InvalidJsonPointer::class);
@@ -74,10 +67,9 @@ public static function provideInvalidJsonStringValue(): \Generator
     }
 
     /**
-     * @dataProvider provideJsonStringValueUriFragmentIdentifierStringValueAndReferenceTokens
-     *
      * @param array<int, ReferenceToken> $referenceTokens
      */
+    #[Framework\Attributes\DataProvider('provideJsonStringValueUriFragmentIdentifierStringValueAndReferenceTokens')]
     public function testFromJsonStringReturnsJsonPointer(
         string $jsonStringValue,
         string $uriFragmentIdentifierStringValue,
@@ -91,10 +83,9 @@ public function testFromJsonStringReturnsJsonPointer(
     }
 
     /**
-     * @dataProvider provideJsonStringValueUriFragmentIdentifierStringValueAndReferenceTokens
-     *
      * @param array<int, ReferenceToken> $referenceTokens
      */
+    #[Framework\Attributes\DataProvider('provideJsonStringValueUriFragmentIdentifierStringValueAndReferenceTokens')]
     public function testFromUriFragmentIdentifierStringReturnsJsonPointer(
         string $jsonStringValue,
         string $uriFragmentIdentifierStringValue,
@@ -108,10 +99,9 @@ public function testFromUriFragmentIdentifierStringReturnsJsonPointer(
     }
 
     /**
-     * @dataProvider provideJsonStringValueUriFragmentIdentifierStringValueAndReferenceTokens
-     *
      * @param array<int, ReferenceToken> $referenceTokens
      */
+    #[Framework\Attributes\DataProvider('provideJsonStringValueUriFragmentIdentifierStringValueAndReferenceTokens')]
     public function testFromReferenceTokensReturnsJsonPointer(
         string $jsonStringValue,
         string $uriFragmentIdentifierStringValue,
@@ -332,9 +322,7 @@ public static function provideJsonStringValueUriFragmentIdentifierStringValueAnd
         }
     }
 
-    /**
-     * @dataProvider provideInvalidUriFragmentIdentifierStringValue
-     */
+    #[Framework\Attributes\DataProvider('provideInvalidUriFragmentIdentifierStringValue')]
     public function testFromUriFragmentIdentifierStringRejectsInvalidValue(string $value): void
     {
         $this->expectException(Exception\InvalidJsonPointer::class);
@@ -385,9 +373,7 @@ public function testDocumentReturnsJsonPointer(): void
         self::assertSame('#', $jsonPointer->toUriFragmentIdentifierString());
     }
 
-    /**
-     * @dataProvider provideJsonPointerReferenceTokenAndExpectedJsonPointer
-     */
+    #[Framework\Attributes\DataProvider('provideJsonPointerReferenceTokenAndExpectedJsonPointer')]
     public function testAppendReturnsJsonPointer(
         JsonPointer $jsonPointer,
         ReferenceToken $referenceToken,
diff --git a/test/Unit/PatternTest.php b/test/Unit/PatternTest.php
index b688f1f0..44109c8c 100644
--- a/test/Unit/PatternTest.php
+++ b/test/Unit/PatternTest.php
@@ -16,11 +16,7 @@
 use Ergebnis\Json\Pointer\Pattern;
 use PHPUnit\Framework;
 
-/**
- * @internal
- *
- * @covers \Ergebnis\Json\Pointer\Pattern
- */
+#[Framework\Attributes\CoversClass(Pattern::class)]
 final class PatternTest extends Framework\TestCase
 {
     /**
diff --git a/test/Unit/ReferenceTokenTest.php b/test/Unit/ReferenceTokenTest.php
index ed3081b7..aedae8b7 100644
--- a/test/Unit/ReferenceTokenTest.php
+++ b/test/Unit/ReferenceTokenTest.php
@@ -13,25 +13,19 @@
 
 namespace Ergebnis\Json\Pointer\Test\Unit;
 
+use Ergebnis\DataProvider;
 use Ergebnis\Json\Pointer\Exception;
 use Ergebnis\Json\Pointer\ReferenceToken;
 use Ergebnis\Json\Pointer\Test;
 use PHPUnit\Framework;
 
-/**
- * @internal
- *
- * @covers \Ergebnis\Json\Pointer\ReferenceToken
- *
- * @uses \Ergebnis\Json\Pointer\Exception\InvalidReferenceToken
- */
+#[Framework\Attributes\CoversClass(ReferenceToken::class)]
+#[Framework\Attributes\UsesClass(Exception\InvalidReferenceToken::class)]
 final class ReferenceTokenTest extends Framework\TestCase
 {
     use Test\Util\Helper;
 
-    /**
-     * @dataProvider provideInvalidJsonStringValue
-     */
+    #[Framework\Attributes\DataProvider('provideInvalidJsonStringValue')]
     public function testFromJsonStringRejectsInvalidValue(string $value): void
     {
         $this->expectException(Exception\InvalidReferenceToken::class);
@@ -74,9 +68,7 @@ public static function provideInvalidJsonStringValue(): \Generator
         }
     }
 
-    /**
-     * @dataProvider provideInvalidUriFragmentIdentifierStringValue
-     */
+    #[Framework\Attributes\DataProvider('provideInvalidUriFragmentIdentifierStringValue')]
     public function testFromUriFragmentIdentifierStringRejectsInvalidValue(string $value): void
     {
         $this->expectException(Exception\InvalidReferenceToken::class);
@@ -109,9 +101,7 @@ public static function provideInvalidUriFragmentIdentifierStringValue(): \Genera
         }
     }
 
-    /**
-     * @dataProvider provideValueJsonStringValueAndUriFragmentIdentifierStringValue
-     */
+    #[Framework\Attributes\DataProvider('provideValueJsonStringValueAndUriFragmentIdentifierStringValue')]
     public function testFromJsonStringReturnsReferenceToken(
         string $value,
         string $jsonStringValue,
@@ -124,9 +114,7 @@ public function testFromJsonStringReturnsReferenceToken(
         self::assertSame($uriFragmentIdentifierStringValue, $referenceToken->toUriFragmentIdentifierString());
     }
 
-    /**
-     * @dataProvider provideValueJsonStringValueAndUriFragmentIdentifierStringValue
-     */
+    #[Framework\Attributes\DataProvider('provideValueJsonStringValueAndUriFragmentIdentifierStringValue')]
     public function testFromStringReturnsReferenceToken(
         string $value,
         string $jsonStringValue,
@@ -139,9 +127,7 @@ public function testFromStringReturnsReferenceToken(
         self::assertSame($uriFragmentIdentifierStringValue, $referenceToken->toUriFragmentIdentifierString());
     }
 
-    /**
-     * @dataProvider provideValueJsonStringValueAndUriFragmentIdentifierStringValue
-     */
+    #[Framework\Attributes\DataProvider('provideValueJsonStringValueAndUriFragmentIdentifierStringValue')]
     public function testFromUriFragmentIdentifierStringReturnsReferenceToken(
         string $value,
         string $jsonStringValue,
@@ -299,9 +285,7 @@ public static function provideValueJsonStringValueAndUriFragmentIdentifierString
         }
     }
 
-    /**
-     * @dataProvider \Ergebnis\DataProvider\IntProvider::lessThanZero()
-     */
+    #[Framework\Attributes\DataProviderExternal(DataProvider\IntProvider::class, 'lessThanZero')]
     public function testFromIntRejectsInvalidValue(int $value): void
     {
         $this->expectException(Exception\InvalidReferenceToken::class);
@@ -309,10 +293,8 @@ public function testFromIntRejectsInvalidValue(int $value): void
         ReferenceToken::fromInt($value);
     }
 
-    /**
-     * @dataProvider \Ergebnis\DataProvider\IntProvider::greaterThanZero()
-     * @dataProvider \Ergebnis\DataProvider\IntProvider::zero()
-     */
+    #[Framework\Attributes\DataProviderExternal(DataProvider\IntProvider::class, 'greaterThanZero')]
+    #[Framework\Attributes\DataProviderExternal(DataProvider\IntProvider::class, 'zero')]
     public function testFromIntReturnsReferenceToken(int $value): void
     {
         $referenceToken = ReferenceToken::fromInt($value);
diff --git a/test/Unit/SpecificationTest.php b/test/Unit/SpecificationTest.php
index 56d28f96..cd18fa99 100644
--- a/test/Unit/SpecificationTest.php
+++ b/test/Unit/SpecificationTest.php
@@ -14,18 +14,14 @@
 namespace Ergebnis\Json\Pointer\Test\Unit;
 
 use Ergebnis\Json\Pointer\JsonPointer;
+use Ergebnis\Json\Pointer\ReferenceToken;
 use Ergebnis\Json\Pointer\Specification;
 use Ergebnis\Json\Pointer\Test;
 use PHPUnit\Framework;
 
-/**
- * @internal
- *
- * @covers \Ergebnis\Json\Pointer\Specification
- *
- * @uses \Ergebnis\Json\Pointer\JsonPointer
- * @uses \Ergebnis\Json\Pointer\ReferenceToken
- */
+#[Framework\Attributes\CoversClass(Specification::class)]
+#[Framework\Attributes\UsesClass(JsonPointer::class)]
+#[Framework\Attributes\UsesClass(ReferenceToken::class)]
 final class SpecificationTest extends Framework\TestCase
 {
     use Test\Util\Helper;
diff --git a/test/Unit/phpunit.xml b/test/Unit/phpunit.xml
index 9a3ee460..f61186b8 100644
--- a/test/Unit/phpunit.xml
+++ b/test/Unit/phpunit.xml
@@ -11,13 +11,23 @@
     cacheResult="true"
     colors="true"
     columns="max"
+    displayDetailsOnIncompleteTests="true"
+    displayDetailsOnSkippedTests="true"
+    displayDetailsOnTestsThatTriggerDeprecations="true"
+    displayDetailsOnTestsThatTriggerErrors="true"
+    displayDetailsOnTestsThatTriggerNotices="true"
+    displayDetailsOnTestsThatTriggerWarnings="true"
     executionOrder="random"
+    requireCoverageMetadata="true"
     stopOnError="false"
     stopOnFailure="false"
     stopOnIncomplete="false"
     stopOnSkipped="false"
 >
     <coverage includeUncoveredFiles="true"/>
+    <extensions>
+        <bootstrap class="Ergebnis\PHPUnit\SlowTestDetector\Extension"/>
+    </extensions>
     <source>
         <include>
             <directory suffix=".php">../../src/</directory>