diff --git a/composer.lock b/composer.lock
index 330a39f..b0a7254 100644
--- a/composer.lock
+++ b/composer.lock
@@ -394,16 +394,16 @@
         },
         {
             "name": "composer/xdebug-handler",
-            "version": "3.0.4",
+            "version": "3.0.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/xdebug-handler.git",
-                "reference": "4f988f8fdf580d53bdb2d1278fe93d1ed5462255"
+                "reference": "6c1925561632e83d60a44492e0b344cf48ab85ef"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/4f988f8fdf580d53bdb2d1278fe93d1ed5462255",
-                "reference": "4f988f8fdf580d53bdb2d1278fe93d1ed5462255",
+                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/6c1925561632e83d60a44492e0b344cf48ab85ef",
+                "reference": "6c1925561632e83d60a44492e0b344cf48ab85ef",
                 "shasum": ""
             },
             "require": {
@@ -440,7 +440,7 @@
             "support": {
                 "irc": "ircs://irc.libera.chat:6697/composer",
                 "issues": "https://github.com/composer/xdebug-handler/issues",
-                "source": "https://github.com/composer/xdebug-handler/tree/3.0.4"
+                "source": "https://github.com/composer/xdebug-handler/tree/3.0.5"
             },
             "funding": [
                 {
@@ -456,7 +456,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-03-26T18:29:49+00:00"
+            "time": "2024-05-06T16:37:16+00:00"
         },
         {
             "name": "dnoegel/php-xdg-base-dir",
@@ -1330,16 +1330,16 @@
         },
         {
             "name": "phpstan/phpdoc-parser",
-            "version": "1.28.0",
+            "version": "1.29.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpdoc-parser.git",
-                "reference": "cd06d6b1a1b3c75b0b83f97577869fd85a3cd4fb"
+                "reference": "536889f2b340489d328f5ffb7b02bb6b183ddedc"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpdoc-parser/zipball/cd06d6b1a1b3c75b0b83f97577869fd85a3cd4fb",
-                "reference": "cd06d6b1a1b3c75b0b83f97577869fd85a3cd4fb",
+                "url": "https://api.github.com/repos/phpstan/phpdoc-parser/zipball/536889f2b340489d328f5ffb7b02bb6b183ddedc",
+                "reference": "536889f2b340489d328f5ffb7b02bb6b183ddedc",
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             },
             "require": {
@@ -1371,22 +1371,22 @@
             "description": "PHPDoc parser with support for nullable, intersection and generic types",
             "support": {
                 "issues": "https://github.com/phpstan/phpdoc-parser/issues",
-                "source": "https://github.com/phpstan/phpdoc-parser/tree/1.28.0"
+                "source": "https://github.com/phpstan/phpdoc-parser/tree/1.29.0"
             },
-            "time": "2024-04-03T18:51:33+00:00"
+            "time": "2024-05-06T12:04:23+00:00"
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.10.67",
+            "version": "1.11.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "16ddbe776f10da6a95ebd25de7c1dbed397dc493"
+                "reference": "666cb1703742cea9cc80fee631f0940e1592fa6e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/16ddbe776f10da6a95ebd25de7c1dbed397dc493",
-                "reference": "16ddbe776f10da6a95ebd25de7c1dbed397dc493",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/666cb1703742cea9cc80fee631f0940e1592fa6e",
+                "reference": "666cb1703742cea9cc80fee631f0940e1592fa6e",
                 "shasum": ""
             },
             "require": {
@@ -1431,7 +1431,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2024-04-16T07:22:02+00:00"
+            "time": "2024-05-13T06:02:22+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -2020,16 +2020,16 @@
         },
         {
             "name": "rector/rector",
-            "version": "1.0.4",
+            "version": "1.0.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/rectorphp/rector.git",
-                "reference": "6e04d0eb087aef707fa0c5686d33d6ff61f4a555"
+                "reference": "73eb63e4f9011dba6b7c66c3262543014e352f34"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/rectorphp/rector/zipball/6e04d0eb087aef707fa0c5686d33d6ff61f4a555",
-                "reference": "6e04d0eb087aef707fa0c5686d33d6ff61f4a555",
+                "url": "https://api.github.com/repos/rectorphp/rector/zipball/73eb63e4f9011dba6b7c66c3262543014e352f34",
+                "reference": "73eb63e4f9011dba6b7c66c3262543014e352f34",
                 "shasum": ""
             },
             "require": {
@@ -2067,7 +2067,7 @@
             ],
             "support": {
                 "issues": "https://github.com/rectorphp/rector/issues",
-                "source": "https://github.com/rectorphp/rector/tree/1.0.4"
+                "source": "https://github.com/rectorphp/rector/tree/1.0.5"
             },
             "funding": [
                 {
@@ -2075,7 +2075,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2024-04-05T09:01:07+00:00"
+            "time": "2024-05-10T05:31:15+00:00"
         },
         {
             "name": "sebastian/cli-parser",
@@ -2995,16 +2995,16 @@
         },
         {
             "name": "spatie/array-to-xml",
-            "version": "3.2.3",
+            "version": "3.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/spatie/array-to-xml.git",
-                "reference": "c95fd4db94ec199f798d4b5b4a81757bd20d88ab"
+                "reference": "f56b220fe2db1ade4c88098d83413ebdfc3bf876"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/spatie/array-to-xml/zipball/c95fd4db94ec199f798d4b5b4a81757bd20d88ab",
-                "reference": "c95fd4db94ec199f798d4b5b4a81757bd20d88ab",
+                "url": "https://api.github.com/repos/spatie/array-to-xml/zipball/f56b220fe2db1ade4c88098d83413ebdfc3bf876",
+                "reference": "f56b220fe2db1ade4c88098d83413ebdfc3bf876",
                 "shasum": ""
             },
             "require": {
@@ -3017,6 +3017,11 @@
                 "spatie/pest-plugin-snapshots": "^1.1"
             },
             "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "3.x-dev"
+                }
+            },
             "autoload": {
                 "psr-4": {
                     "Spatie\\ArrayToXml\\": "src"
@@ -3042,7 +3047,7 @@
                 "xml"
             ],
             "support": {
-                "source": "https://github.com/spatie/array-to-xml/tree/3.2.3"
+                "source": "https://github.com/spatie/array-to-xml/tree/3.3.0"
             },
             "funding": [
                 {
@@ -3054,7 +3059,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2024-02-07T10:39:02+00:00"
+            "time": "2024-05-01T10:20:27+00:00"
         },
         {
             "name": "symfony/console",
@@ -3149,6 +3154,73 @@
             ],
             "time": "2024-04-18T09:29:19+00:00"
         },
+        {
+            "name": "symfony/deprecation-contracts",
+            "version": "v3.5.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/deprecation-contracts.git",
+                "reference": "0e0d29ce1f20deffb4ab1b016a7257c4f1e789a1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/deprecation-contracts/zipball/0e0d29ce1f20deffb4ab1b016a7257c4f1e789a1",
+                "reference": "0e0d29ce1f20deffb4ab1b016a7257c4f1e789a1",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "3.5-dev"
+                },
+                "thanks": {
+                    "name": "symfony/contracts",
+                    "url": "https://github.com/symfony/contracts"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "function.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "A generic function and convention to trigger deprecation notices",
+            "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/deprecation-contracts/tree/v3.5.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2024-04-18T09:32:20+00:00"
+        },
         {
             "name": "symfony/filesystem",
             "version": "v7.0.7",
@@ -3594,21 +3666,22 @@
         },
         {
             "name": "symfony/service-contracts",
-            "version": "v3.4.2",
+            "version": "v3.5.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/service-contracts.git",
-                "reference": "11bbf19a0fb7b36345861e85c5768844c552906e"
+                "reference": "bd1d9e59a81d8fa4acdcea3f617c581f7475a80f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/11bbf19a0fb7b36345861e85c5768844c552906e",
-                "reference": "11bbf19a0fb7b36345861e85c5768844c552906e",
+                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/bd1d9e59a81d8fa4acdcea3f617c581f7475a80f",
+                "reference": "bd1d9e59a81d8fa4acdcea3f617c581f7475a80f",
                 "shasum": ""
             },
             "require": {
                 "php": ">=8.1",
-                "psr/container": "^1.1|^2.0"
+                "psr/container": "^1.1|^2.0",
+                "symfony/deprecation-contracts": "^2.5|^3"
             },
             "conflict": {
                 "ext-psr": "<1.1|>=2"
@@ -3616,7 +3689,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "3.4-dev"
+                    "dev-main": "3.5-dev"
                 },
                 "thanks": {
                     "name": "symfony/contracts",
@@ -3656,7 +3729,7 @@
                 "standards"
             ],
             "support": {
-                "source": "https://github.com/symfony/service-contracts/tree/v3.4.2"
+                "source": "https://github.com/symfony/service-contracts/tree/v3.5.0"
             },
             "funding": [
                 {
@@ -3672,7 +3745,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-12-19T21:51:00+00:00"
+            "time": "2024-04-18T09:32:20+00:00"
         },
         {
             "name": "symfony/string",
@@ -3812,16 +3885,16 @@
         },
         {
             "name": "vimeo/psalm",
-            "version": "5.23.1",
+            "version": "5.24.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/vimeo/psalm.git",
-                "reference": "8471a896ccea3526b26d082f4461eeea467f10a4"
+                "reference": "462c80e31c34e58cc4f750c656be3927e80e550e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/vimeo/psalm/zipball/8471a896ccea3526b26d082f4461eeea467f10a4",
-                "reference": "8471a896ccea3526b26d082f4461eeea467f10a4",
+                "url": "https://api.github.com/repos/vimeo/psalm/zipball/462c80e31c34e58cc4f750c656be3927e80e550e",
+                "reference": "462c80e31c34e58cc4f750c656be3927e80e550e",
                 "shasum": ""
             },
             "require": {
@@ -3918,7 +3991,7 @@
                 "issues": "https://github.com/vimeo/psalm/issues",
                 "source": "https://github.com/vimeo/psalm"
             },
-            "time": "2024-03-11T20:33:46+00:00"
+            "time": "2024-05-01T19:32:08+00:00"
         },
         {
             "name": "webmozart/assert",
diff --git a/phpunit.xml b/phpunit.xml
index bcdb3b9..eb94803 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.2/phpunit.xsd" backupGlobals="false" bootstrap="vendor/autoload.php" colors="true" processIsolation="false" stopOnFailure="false" cacheDirectory=".phpunit.cache" backupStaticProperties="false"  displayDetailsOnTestsThatTriggerWarnings="true">
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.2/phpunit.xsd" backupGlobals="false" bootstrap="vendor/autoload.php" colors="true" processIsolation="false" stopOnFailure="false" cacheDirectory=".phpunit.cache" backupStaticProperties="false"  displayDetailsOnTestsThatTriggerWarnings="true" beStrictAboutCoverageMetadata="true" requireCoverageMetadata="true">
   <testsuites>
     <testsuite name="PHPSkills Test Suite">
       <directory>./tests/</directory>
diff --git a/src/HashMap.php b/src/HashMap.php
index 62ca46a..56e3f1b 100644
--- a/src/HashMap.php
+++ b/src/HashMap.php
@@ -19,7 +19,7 @@ class HashMap
      */
     private array $hashToKey = [];
 
-    public function getValue(object $key): object
+    public function getValue(object $key): mixed
     {
         $hash = spl_object_id($key);
 
diff --git a/src/PlayersRange.php b/src/PlayersRange.php
index 81eb919..a921603 100644
--- a/src/PlayersRange.php
+++ b/src/PlayersRange.php
@@ -8,8 +8,4 @@ use DNW\Skills\Numerics\Range;
 
 class PlayersRange extends Range
 {
-    protected static function create(int $min, int $max): static
-    {
-        return new static($min, $max);
-    }
 }
diff --git a/src/TeamsRange.php b/src/TeamsRange.php
index 70b6518..79d5fb5 100644
--- a/src/TeamsRange.php
+++ b/src/TeamsRange.php
@@ -8,8 +8,4 @@ use DNW\Skills\Numerics\Range;
 
 class TeamsRange extends Range
 {
-    protected static function create(int $min, int $max): static
-    {
-        return new static($min, $max);
-    }
 }
diff --git a/tests/FactorGraphs/VariableTest.php b/tests/FactorGraphs/VariableTest.php
index 835f6d0..8fad3d6 100644
--- a/tests/FactorGraphs/VariableTest.php
+++ b/tests/FactorGraphs/VariableTest.php
@@ -7,7 +7,11 @@ namespace DNW\Skills\Tests\FactorGraphs;
 use DNW\Skills\FactorGraphs\Variable;
 use DNW\Skills\Numerics\GaussianDistribution;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\UsesClass;
 
+#[CoversClass(Variable::class)]
+#[UsesClass(GaussianDistribution::class)]
 class VariableTest extends TestCase
 {
     public function testGetterSetter(): void
diff --git a/tests/GameInfoTest.php b/tests/GameInfoTest.php
index 2311b88..f84ea24 100644
--- a/tests/GameInfoTest.php
+++ b/tests/GameInfoTest.php
@@ -5,8 +5,13 @@ declare(strict_types=1);
 namespace DNW\Skills\Tests;
 
 use DNW\Skills\GameInfo;
+use \DNW\Skills\Rating;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\UsesClass;
 
+#[CoversClass(GameInfo::class)]
+#[UsesClass(Rating::class)]
 class GameInfoTest extends TestCase
 {
     public function testMembers(): void
@@ -17,6 +22,6 @@ class GameInfoTest extends TestCase
         $this->assertEquals(3, $gi->getBeta());
         $this->assertEquals(4, $gi->getDynamicsFactor());
         $this->assertEquals(5, $gi->getDrawProbability());
-        $this->assertInstanceOf(\DNW\Skills\Rating::class, $gi->getDefaultRating());
+        $this->assertInstanceOf(Rating::class, $gi->getDefaultRating());
     }
 }
diff --git a/tests/GuardTest.php b/tests/GuardTest.php
index b5a418b..42c97ec 100644
--- a/tests/GuardTest.php
+++ b/tests/GuardTest.php
@@ -7,7 +7,9 @@ namespace DNW\Skills\Tests;
 use DNW\Skills\Guard;
 use Exception;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
 
+#[CoversClass(Guard::class)]
 class GuardTest extends TestCase
 {
     public function testargumentIsValidIndex(): void
diff --git a/tests/HashMapTest.php b/tests/HashMapTest.php
new file mode 100644
index 0000000..6bd1f62
--- /dev/null
+++ b/tests/HashMapTest.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DNW\Skills\Tests;
+
+use DNW\Skills\HashMap;
+use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+
+#[CoversClass(HashMap::class)]
+class HashMapTest extends TestCase
+{
+    public function testHashmap(): void
+    {
+        $h = new HashMap();
+
+        $this->assertEquals([], $h->getAllKeys());
+        $this->assertEquals([], $h->getAllValues());
+
+
+        $o1 = new \stdClass();
+        $o2 = new \stdClass();
+
+        $h->setValue($o1, 1);
+        $h->setvalue($o2, 2);
+
+        $this->assertEquals([1, 2], $h->getAllValues());
+
+        $this->assertEquals(1, $h->getvalue($o1));
+        $this->assertEquals(2, $h->getvalue($o2));
+
+        $this->assertEquals(2, $h->count());
+    }
+}
diff --git a/tests/Numerics/BasicMathTest.php b/tests/Numerics/BasicMathTest.php
index f17c635..a79b6af 100644
--- a/tests/Numerics/BasicMathTest.php
+++ b/tests/Numerics/BasicMathTest.php
@@ -6,7 +6,9 @@ namespace DNW\Skills\Tests\Numerics;
 
 use DNW\Skills\Numerics\BasicMath;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
 
+#[CoversClass(BasicMath::class)]
 class BasicMathTest extends TestCase
 {
     public function testSquare(): void
diff --git a/tests/Numerics/GaussianDistributionTest.php b/tests/Numerics/GaussianDistributionTest.php
index 27081f5..90ee863 100644
--- a/tests/Numerics/GaussianDistributionTest.php
+++ b/tests/Numerics/GaussianDistributionTest.php
@@ -7,7 +7,11 @@ namespace DNW\Skills\Tests\Numerics;
 use DNW\Skills\Numerics\BasicMath;
 use DNW\Skills\Numerics\GaussianDistribution;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\UsesClass;
 
+#[CoversClass(GaussianDistribution::class)]
+#[UsesClass(BasicMath::class)]
 class GaussianDistributionTest extends TestCase
 {
     private const ERROR_TOLERANCE = 0.000001;
diff --git a/tests/Numerics/RangeTest.php b/tests/Numerics/RangeTest.php
index 2f4cd32..5eec974 100644
--- a/tests/Numerics/RangeTest.php
+++ b/tests/Numerics/RangeTest.php
@@ -6,8 +6,10 @@ namespace DNW\Skills\Tests\Numerics;
 
 use DNW\Skills\Numerics\Range;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
 use Exception;
 
+#[CoversClass(Range::class)]
 class RangeTest extends TestCase
 {
     public function testConstructInvalidParam(): void
diff --git a/tests/PlayerTest.php b/tests/PlayerTest.php
index 0602a4e..b6f6461 100644
--- a/tests/PlayerTest.php
+++ b/tests/PlayerTest.php
@@ -5,8 +5,14 @@ declare(strict_types=1);
 namespace DNW\Skills\Tests;
 
 use DNW\Skills\Player;
+use DNW\Skills\Guard;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\UsesClass;
 
+
+#[CoversClass(Player::class)]
+#[UsesClass(Guard::class)]
 class PlayerTest extends TestCase
 {
     public function testPlayerObjectGetterSetter(): void
diff --git a/tests/RankSorterTest.php b/tests/RankSorterTest.php
index 7b98e4f..87db13a 100644
--- a/tests/RankSorterTest.php
+++ b/tests/RankSorterTest.php
@@ -6,7 +6,9 @@ namespace DNW\Skills\Tests;
 
 use DNW\Skills\RankSorter;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
 
+#[CoversClass(RankSorter::class)]
 class RankSorterTest extends TestCase
 {
     public function testSort(): void
diff --git a/tests/RatingTest.php b/tests/RatingTest.php
index 80cb8b5..1689edc 100644
--- a/tests/RatingTest.php
+++ b/tests/RatingTest.php
@@ -5,8 +5,15 @@ declare(strict_types=1);
 namespace DNW\Skills\Tests;
 
 use DNW\Skills\Rating;
+use DNW\Skills\Numerics\BasicMath;
+use DNW\Skills\Numerics\GaussianDistribution;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\UsesClass;
 
+#[CoversClass(Rating::class)]
+#[UsesClass(BasicMath::class)]
+#[UsesClass(GaussianDistribution::class)]
 class RatingTest extends TestCase
 {
     public function testGetRatingParameters(): void
diff --git a/tests/TrueSkill/DrawMarginTest.php b/tests/TrueSkill/DrawMarginTest.php
index 4584f9e..eb807d3 100644
--- a/tests/TrueSkill/DrawMarginTest.php
+++ b/tests/TrueSkill/DrawMarginTest.php
@@ -5,8 +5,15 @@ declare(strict_types=1);
 namespace DNW\Skills\Tests\TrueSkill;
 
 use DNW\Skills\TrueSkill\DrawMargin;
+use DNW\Skills\Numerics\BasicMath;
+use DNW\Skills\Numerics\GaussianDistribution;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\UsesClass;
 
+#[CoversClass(DrawMargin::class)]
+#[UsesClass(BasicMath::class)]
+#[UsesClass(GaussianDistribution::class)]
 class DrawMarginTest extends TestCase
 {
     private const ERROR_TOLERANCE = 0.000001;
@@ -23,6 +30,6 @@ class DrawMarginTest extends TestCase
     private function assertDrawMargin(float $drawProbability, float $beta, float $expected): void
     {
         $actual = DrawMargin::getDrawMarginFromDrawProbability($drawProbability, $beta);
-        $this->assertEqualsWithDelta($expected, $actual, DrawMarginTest::ERROR_TOLERANCE);
+        $this->assertEqualsWithDelta($expected, $actual, self::ERROR_TOLERANCE);
     }
 }