diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 13dff70..4cdae7c 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -42,3 +42,6 @@ jobs:
 
     - name: Run PHPStan
       run: vendor/bin/phpstan
+
+    - name: Run PHPUnit
+      run: vendor/bin/phpunit
diff --git a/.gitignore b/.gitignore
index bc29622..2a9950c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 composer.phar
+.phpunit.cache/
 
 .idea/
-vendor/
\ No newline at end of file
+vendor/
diff --git a/composer.json b/composer.json
index 9668810..7bfb0ef 100644
--- a/composer.json
+++ b/composer.json
@@ -7,6 +7,11 @@
       "Gared\\EtherScan\\": "src/"
     }
   },
+  "autoload-dev": {
+    "psr-4" : {
+      "Gared\\EtherScan\\Tests\\": "tests/"
+    }
+  },
   "require": {
     "php": ">=8.3",
     "ext-json": "*",
@@ -15,6 +20,7 @@
     "elephantio/elephant.io": "^4.8"
   },
   "require-dev": {
-    "phpstan/phpstan": "^2.0"
+    "phpstan/phpstan": "^2.0",
+    "phpunit/phpunit": "^12.5"
   }
 }
diff --git a/composer.lock b/composer.lock
index 5ecf83a..8ad7e95 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": "7803b7aff6bc0339c4796639543e6b33",
+    "content-hash": "0325dccf14c196e20536b17a0b037cfc",
     "packages": [
         {
             "name": "elephantio/elephant.io",
@@ -1364,6 +1364,242 @@
         }
     ],
     "packages-dev": [
+        {
+            "name": "myclabs/deep-copy",
+            "version": "1.13.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/myclabs/DeepCopy.git",
+                "reference": "07d290f0c47959fd5eed98c95ee5602db07e0b6a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/07d290f0c47959fd5eed98c95ee5602db07e0b6a",
+                "reference": "07d290f0c47959fd5eed98c95ee5602db07e0b6a",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1 || ^8.0"
+            },
+            "conflict": {
+                "doctrine/collections": "<1.6.8",
+                "doctrine/common": "<2.13.3 || >=3 <3.2.2"
+            },
+            "require-dev": {
+                "doctrine/collections": "^1.6.8",
+                "doctrine/common": "^2.13.3 || ^3.2.2",
+                "phpspec/prophecy": "^1.10",
+                "phpunit/phpunit": "^7.5.20 || ^8.5.23 || ^9.5.13"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "src/DeepCopy/deep_copy.php"
+                ],
+                "psr-4": {
+                    "DeepCopy\\": "src/DeepCopy/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Create deep copies (clones) of your objects",
+            "keywords": [
+                "clone",
+                "copy",
+                "duplicate",
+                "object",
+                "object graph"
+            ],
+            "support": {
+                "issues": "https://github.com/myclabs/DeepCopy/issues",
+                "source": "https://github.com/myclabs/DeepCopy/tree/1.13.4"
+            },
+            "funding": [
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/myclabs/deep-copy",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-08-01T08:46:24+00:00"
+        },
+        {
+            "name": "nikic/php-parser",
+            "version": "v5.7.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nikic/PHP-Parser.git",
+                "reference": "dca41cd15c2ac9d055ad70dbfd011130757d1f82"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/dca41cd15c2ac9d055ad70dbfd011130757d1f82",
+                "reference": "dca41cd15c2ac9d055ad70dbfd011130757d1f82",
+                "shasum": ""
+            },
+            "require": {
+                "ext-ctype": "*",
+                "ext-json": "*",
+                "ext-tokenizer": "*",
+                "php": ">=7.4"
+            },
+            "require-dev": {
+                "ircmaxell/php-yacc": "^0.0.7",
+                "phpunit/phpunit": "^9.0"
+            },
+            "bin": [
+                "bin/php-parse"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "5.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PhpParser\\": "lib/PhpParser"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Nikita Popov"
+                }
+            ],
+            "description": "A PHP parser written in PHP",
+            "keywords": [
+                "parser",
+                "php"
+            ],
+            "support": {
+                "issues": "https://github.com/nikic/PHP-Parser/issues",
+                "source": "https://github.com/nikic/PHP-Parser/tree/v5.7.0"
+            },
+            "time": "2025-12-06T11:56:16+00:00"
+        },
+        {
+            "name": "phar-io/manifest",
+            "version": "2.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/manifest.git",
+                "reference": "54750ef60c58e43759730615a392c31c80e23176"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/manifest/zipball/54750ef60c58e43759730615a392c31c80e23176",
+                "reference": "54750ef60c58e43759730615a392c31c80e23176",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-libxml": "*",
+                "ext-phar": "*",
+                "ext-xmlwriter": "*",
+                "phar-io/version": "^3.0.1",
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
+            "support": {
+                "issues": "https://github.com/phar-io/manifest/issues",
+                "source": "https://github.com/phar-io/manifest/tree/2.0.4"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-03-03T12:33:53+00:00"
+        },
+        {
+            "name": "phar-io/version",
+            "version": "3.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/version.git",
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Library for handling version information and constraints",
+            "support": {
+                "issues": "https://github.com/phar-io/version/issues",
+                "source": "https://github.com/phar-io/version/tree/3.2.1"
+            },
+            "time": "2022-02-21T01:04:05+00:00"
+        },
         {
             "name": "phpstan/phpstan",
             "version": "2.1.38",
@@ -1416,6 +1652,1457 @@
                 }
             ],
             "time": "2026-01-30T17:12:46+00:00"
+        },
+        {
+            "name": "phpunit/php-code-coverage",
+            "version": "12.5.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
+                "reference": "b015312f28dd75b75d3422ca37dff2cd1a565e8d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/b015312f28dd75b75d3422ca37dff2cd1a565e8d",
+                "reference": "b015312f28dd75b75d3422ca37dff2cd1a565e8d",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-libxml": "*",
+                "ext-xmlwriter": "*",
+                "nikic/php-parser": "^5.7.0",
+                "php": ">=8.3",
+                "phpunit/php-file-iterator": "^6.0",
+                "phpunit/php-text-template": "^5.0",
+                "sebastian/complexity": "^5.0",
+                "sebastian/environment": "^8.0.3",
+                "sebastian/lines-of-code": "^4.0",
+                "sebastian/version": "^6.0",
+                "theseer/tokenizer": "^2.0.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^12.5.1"
+            },
+            "suggest": {
+                "ext-pcov": "PHP extension that provides line coverage",
+                "ext-xdebug": "PHP extension that provides line coverage as well as branch and path coverage"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "12.5.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that provides collection, processing, and rendering functionality for PHP code coverage information.",
+            "homepage": "https://github.com/sebastianbergmann/php-code-coverage",
+            "keywords": [
+                "coverage",
+                "testing",
+                "xunit"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
+                "security": "https://github.com/sebastianbergmann/php-code-coverage/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/12.5.3"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                },
+                {
+                    "url": "https://liberapay.com/sebastianbergmann",
+                    "type": "liberapay"
+                },
+                {
+                    "url": "https://thanks.dev/u/gh/sebastianbergmann",
+                    "type": "thanks_dev"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/phpunit/php-code-coverage",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2026-02-06T06:01:44+00:00"
+        },
+        {
+            "name": "phpunit/php-file-iterator",
+            "version": "6.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-file-iterator.git",
+                "reference": "3d1cd096ef6bea4bf2762ba586e35dbd317cbfd5"
+            },
+            "dist": {
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+                "reference": "3d1cd096ef6bea4bf2762ba586e35dbd317cbfd5",
+                "shasum": ""
+            },
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+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
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+                }
+            },
+            "autoload": {
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+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
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+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "FilterIterator implementation that filters files based on a list of suffixes.",
+            "homepage": "https://github.com/sebastianbergmann/php-file-iterator/",
+            "keywords": [
+                "filesystem",
+                "iterator"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-file-iterator/issues",
+                "security": "https://github.com/sebastianbergmann/php-file-iterator/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-file-iterator/tree/6.0.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                },
+                {
+                    "url": "https://liberapay.com/sebastianbergmann",
+                    "type": "liberapay"
+                },
+                {
+                    "url": "https://thanks.dev/u/gh/sebastianbergmann",
+                    "type": "thanks_dev"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/phpunit/php-file-iterator",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2026-02-02T14:04:18+00:00"
+        },
+        {
+            "name": "phpunit/php-invoker",
+            "version": "6.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-invoker.git",
+                "reference": "12b54e689b07a25a9b41e57736dfab6ec9ae5406"
+            },
+            "dist": {
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+                "url": "https://api.github.com/repos/sebastianbergmann/php-invoker/zipball/12b54e689b07a25a9b41e57736dfab6ec9ae5406",
+                "reference": "12b54e689b07a25a9b41e57736dfab6ec9ae5406",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "require-dev": {
+                "ext-pcntl": "*",
+                "phpunit/phpunit": "^12.0"
+            },
+            "suggest": {
+                "ext-pcntl": "*"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "6.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Invoke callables with a timeout",
+            "homepage": "https://github.com/sebastianbergmann/php-invoker/",
+            "keywords": [
+                "process"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-invoker/issues",
+                "security": "https://github.com/sebastianbergmann/php-invoker/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-invoker/tree/6.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T04:58:58+00:00"
+        },
+        {
+            "name": "phpunit/php-text-template",
+            "version": "5.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-text-template.git",
+                "reference": "e1367a453f0eda562eedb4f659e13aa900d66c53"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-text-template/zipball/e1367a453f0eda562eedb4f659e13aa900d66c53",
+                "reference": "e1367a453f0eda562eedb4f659e13aa900d66c53",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "require-dev": {
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+            "extra": {
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+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
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+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Simple template engine.",
+            "homepage": "https://github.com/sebastianbergmann/php-text-template/",
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+                "template"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-text-template/issues",
+                "security": "https://github.com/sebastianbergmann/php-text-template/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-text-template/tree/5.0.0"
+            },
+            "funding": [
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+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T04:59:16+00:00"
+        },
+        {
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+            "version": "8.0.0",
+            "source": {
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+                "url": "https://github.com/sebastianbergmann/php-timer.git",
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+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "require-dev": {
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+            },
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+            "extra": {
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+                }
+            },
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+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            ],
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+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
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+            "homepage": "https://github.com/sebastianbergmann/php-timer/",
+            "keywords": [
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+                "issues": "https://github.com/sebastianbergmann/php-timer/issues",
+                "security": "https://github.com/sebastianbergmann/php-timer/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-timer/tree/8.0.0"
+            },
+            "funding": [
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+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T04:59:38+00:00"
+        },
+        {
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+            "version": "12.5.12",
+            "source": {
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library for counting the lines of code in PHP source code",
+            "homepage": "https://github.com/sebastianbergmann/lines-of-code",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/lines-of-code/issues",
+                "security": "https://github.com/sebastianbergmann/lines-of-code/security/policy",
+                "source": "https://github.com/sebastianbergmann/lines-of-code/tree/4.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T04:57:28+00:00"
+        },
+        {
+            "name": "sebastian/object-enumerator",
+            "version": "7.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-enumerator.git",
+                "reference": "1effe8e9b8e068e9ae228e542d5d11b5d16db894"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/1effe8e9b8e068e9ae228e542d5d11b5d16db894",
+                "reference": "1effe8e9b8e068e9ae228e542d5d11b5d16db894",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3",
+                "sebastian/object-reflector": "^5.0",
+                "sebastian/recursion-context": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^12.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "7.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Traverses array structures and object graphs to enumerate all referenced objects",
+            "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-enumerator/issues",
+                "security": "https://github.com/sebastianbergmann/object-enumerator/security/policy",
+                "source": "https://github.com/sebastianbergmann/object-enumerator/tree/7.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T04:57:48+00:00"
+        },
+        {
+            "name": "sebastian/object-reflector",
+            "version": "5.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-reflector.git",
+                "reference": "4bfa827c969c98be1e527abd576533293c634f6a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/4bfa827c969c98be1e527abd576533293c634f6a",
+                "reference": "4bfa827c969c98be1e527abd576533293c634f6a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^12.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "5.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-reflector/issues",
+                "security": "https://github.com/sebastianbergmann/object-reflector/security/policy",
+                "source": "https://github.com/sebastianbergmann/object-reflector/tree/5.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T04:58:17+00:00"
+        },
+        {
+            "name": "sebastian/recursion-context",
+            "version": "7.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
+                "reference": "0b01998a7d5b1f122911a66bebcb8d46f0c82d8c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/0b01998a7d5b1f122911a66bebcb8d46f0c82d8c",
+                "reference": "0b01998a7d5b1f122911a66bebcb8d46f0c82d8c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^12.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "7.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "https://github.com/sebastianbergmann/recursion-context",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/recursion-context/issues",
+                "security": "https://github.com/sebastianbergmann/recursion-context/security/policy",
+                "source": "https://github.com/sebastianbergmann/recursion-context/tree/7.0.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                },
+                {
+                    "url": "https://liberapay.com/sebastianbergmann",
+                    "type": "liberapay"
+                },
+                {
+                    "url": "https://thanks.dev/u/gh/sebastianbergmann",
+                    "type": "thanks_dev"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/sebastian/recursion-context",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-08-13T04:44:59+00:00"
+        },
+        {
+            "name": "sebastian/type",
+            "version": "6.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/type.git",
+                "reference": "e549163b9760b8f71f191651d22acf32d56d6d4d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/e549163b9760b8f71f191651d22acf32d56d6d4d",
+                "reference": "e549163b9760b8f71f191651d22acf32d56d6d4d",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^12.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "6.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Collection of value objects that represent the types of the PHP type system",
+            "homepage": "https://github.com/sebastianbergmann/type",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/type/issues",
+                "security": "https://github.com/sebastianbergmann/type/security/policy",
+                "source": "https://github.com/sebastianbergmann/type/tree/6.0.3"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                },
+                {
+                    "url": "https://liberapay.com/sebastianbergmann",
+                    "type": "liberapay"
+                },
+                {
+                    "url": "https://thanks.dev/u/gh/sebastianbergmann",
+                    "type": "thanks_dev"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/sebastian/type",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-08-09T06:57:12+00:00"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "6.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "3e6ccf7657d4f0a59200564b08cead899313b53c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/3e6ccf7657d4f0a59200564b08cead899313b53c",
+                "reference": "3e6ccf7657d4f0a59200564b08cead899313b53c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "6.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/version/issues",
+                "security": "https://github.com/sebastianbergmann/version/security/policy",
+                "source": "https://github.com/sebastianbergmann/version/tree/6.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-02-07T05:00:38+00:00"
+        },
+        {
+            "name": "staabm/side-effects-detector",
+            "version": "1.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/staabm/side-effects-detector.git",
+                "reference": "d8334211a140ce329c13726d4a715adbddd0a163"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/staabm/side-effects-detector/zipball/d8334211a140ce329c13726d4a715adbddd0a163",
+                "reference": "d8334211a140ce329c13726d4a715adbddd0a163",
+                "shasum": ""
+            },
+            "require": {
+                "ext-tokenizer": "*",
+                "php": "^7.4 || ^8.0"
+            },
+            "require-dev": {
+                "phpstan/extension-installer": "^1.4.3",
+                "phpstan/phpstan": "^1.12.6",
+                "phpunit/phpunit": "^9.6.21",
+                "symfony/var-dumper": "^5.4.43",
+                "tomasvotruba/type-coverage": "1.0.0",
+                "tomasvotruba/unused-public": "1.0.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "lib/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "A static analysis tool to detect side effects in PHP code",
+            "keywords": [
+                "static analysis"
+            ],
+            "support": {
+                "issues": "https://github.com/staabm/side-effects-detector/issues",
+                "source": "https://github.com/staabm/side-effects-detector/tree/1.0.5"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/staabm",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-10-20T05:08:20+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "7989e43bf381af0eac72e4f0ca5bcbfa81658be4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/7989e43bf381af0eac72e4f0ca5bcbfa81658be4",
+                "reference": "7989e43bf381af0eac72e4f0ca5bcbfa81658be4",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^8.1"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "support": {
+                "issues": "https://github.com/theseer/tokenizer/issues",
+                "source": "https://github.com/theseer/tokenizer/tree/2.0.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-12-08T11:19:18+00:00"
         }
     ],
     "aliases": [],
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..7164ae4
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+         bootstrap="vendor/autoload.php"
+         cacheDirectory=".phpunit.cache"
+         executionOrder="depends,defects"
+         beStrictAboutCoverageMetadata="true"
+         beStrictAboutOutputDuringTests="true"
+         displayDetailsOnPhpunitDeprecations="true"
+         displayDetailsOnTestsThatTriggerNotices="true"
+         failOnPhpunitDeprecation="true"
+         failOnRisky="true"
+         failOnWarning="true">
+    <testsuites>
+        <testsuite name="unit">
+            <directory>tests/Unit</directory>
+        </testsuite>
+    </testsuites>
+
+    <source ignoreIndirectDeprecations="true" restrictNotices="true" restrictWarnings="true">
+        <include>
+            <directory>src</directory>
+        </include>
+    </source>
+</phpunit>
diff --git a/src/Console/ScanCommandOutputHelper.php b/src/Console/ScanCommandOutputHelper.php
index 3521362..c74ab87 100644
--- a/src/Console/ScanCommandOutputHelper.php
+++ b/src/Console/ScanCommandOutputHelper.php
@@ -6,6 +6,7 @@
 use DateTimeImmutable;
 use DateTimeInterface;
 use Exception;
+use Gared\EtherScan\Service\Scanner\Health\HealthResponseException;
 use Gared\EtherScan\Service\ScannerServiceCallbackInterface;
 use GuzzleHttp\Exception\GuzzleException;
 use JsonException;
@@ -107,7 +108,7 @@ public function onHealthResult(array $data): void
         $this->symfonyStyle->error('Health: ' . print_r($data, true));
     }
 
-    public function onHealthException(GuzzleException|JsonException $e): void
+    public function onHealthException(HealthResponseException $e): void
     {
         $this->symfonyStyle->error($e->getMessage());
     }
diff --git a/src/Service/Scanner/Health/HealthResponseException.php b/src/Service/Scanner/Health/HealthResponseException.php
new file mode 100644
index 0000000..b694a57
--- /dev/null
+++ b/src/Service/Scanner/Health/HealthResponseException.php
@@ -0,0 +1,15 @@
+<?php
+declare(strict_types=1);
+
+namespace Gared\EtherScan\Service\Scanner\Health;
+
+use Exception;
+
+class HealthResponseException extends Exception
+{
+    public function __construct(
+        string $message,
+    ) {
+        parent::__construct('Health check was not successful: ' . $message);
+    }
+}
diff --git a/src/Service/Scanner/Health/HealthScanner.php b/src/Service/Scanner/Health/HealthScanner.php
new file mode 100644
index 0000000..7cb39ac
--- /dev/null
+++ b/src/Service/Scanner/Health/HealthScanner.php
@@ -0,0 +1,43 @@
+<?php
+declare(strict_types=1);
+
+namespace Gared\EtherScan\Service\Scanner\Health;
+
+use Gared\EtherScan\Service\ScannerServiceCallbackInterface;
+use Gared\EtherScan\Service\VersionRangeService;
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\GuzzleException;
+use JsonException;
+
+readonly class HealthScanner
+{
+    public function __construct(
+        private VersionRangeService $versionRangeService,
+    ) {
+    }
+
+    public function scan(Client $client, string $baseUrl, ScannerServiceCallbackInterface $callback): void
+    {
+        try {
+            $response = $client->get($baseUrl . 'health');
+        } catch (GuzzleException $e) {
+            $callback->onHealthException(new HealthResponseException($e->getMessage()));
+            return;
+        }
+
+        try {
+            $healthData = json_decode(json: $response->getBody()->__toString(), associative: true, flags: JSON_THROW_ON_ERROR);
+        } catch (JsonException $e) {
+            $callback->onHealthException(new HealthResponseException($e->getMessage()));
+            return;
+        }
+
+        if (is_array($healthData) === false || array_key_exists('releaseId', $healthData) === false || is_string($healthData['releaseId']) === false) {
+            $callback->onHealthException(new HealthResponseException('Invalid realeaseId. Response body: ' . $response->getBody()));
+            return;
+        }
+
+        $callback->onHealthResult($healthData);
+        $this->versionRangeService->setHealthVersion($healthData['releaseId']);
+    }
+}
diff --git a/src/Service/ScannerService.php b/src/Service/ScannerService.php
index 3635ef3..89c9d94 100644
--- a/src/Service/ScannerService.php
+++ b/src/Service/ScannerService.php
@@ -9,6 +9,7 @@
 use Gared\EtherScan\Api\GithubApi;
 use Gared\EtherScan\Exception\EtherpadServiceNotFoundException;
 use Gared\EtherScan\Exception\EtherpadServiceNotPublicException;
+use Gared\EtherScan\Service\Scanner\Health\HealthScanner;
 use GuzzleHttp\Client;
 use GuzzleHttp\Cookie\CookieJar;
 use GuzzleHttp\Exception\GuzzleException;
@@ -33,6 +34,7 @@ class ScannerService
     private ?string $pathPrefix = null;
     private ?string $apiVersion = null;
     private string $padId;
+    private HealthScanner $healthScanner;
 
     public function __construct(
         string $url,
@@ -59,6 +61,7 @@ public function __construct(
         $this->revisionLookup = new RevisionLookupService();
         $this->versionRangeService = new VersionRangeService();
         $this->githubApi = new GithubApi();
+        $this->healthScanner = new HealthScanner($this->versionRangeService);
     }
 
     /**
@@ -72,7 +75,7 @@ public function scan(ScannerServiceCallbackInterface $callback): void
         $this->scanApi($callback);
         $this->scanStaticFiles($callback);
         $this->scanPad($callback);
-        $this->scanHealth($callback);
+        $this->healthScanner->scan($this->client, $this->baseUrl, $callback);
         $this->progressVersionRanges($callback);
         $this->scanStats($callback);
         $this->scanAdmin($callback);
@@ -306,17 +309,7 @@ private function scanStats(ScannerServiceCallbackInterface $callback): void
         }
     }
 
-    private function scanHealth(ScannerServiceCallbackInterface $callback): void
-    {
-        try {
-            $response = $this->client->get($this->baseUrl . 'health');
-            $healthData = json_decode($response->getBody()->__toString(), true, 512, JSON_THROW_ON_ERROR);
-            $callback->onHealthResult($healthData);
-            $this->versionRangeService->setHealthVersion($healthData['releaseId']);
-        } catch (GuzzleException|JsonException $e) {
-            $callback->onHealthException($e);
-        }
-    }
+
 
     private function doSocketWebsocket(
         int $socketIoVersion,
diff --git a/src/Service/ScannerServiceCallbackInterface.php b/src/Service/ScannerServiceCallbackInterface.php
index ec8d44b..2671982 100644
--- a/src/Service/ScannerServiceCallbackInterface.php
+++ b/src/Service/ScannerServiceCallbackInterface.php
@@ -4,6 +4,7 @@
 namespace Gared\EtherScan\Service;
 
 use Exception;
+use Gared\EtherScan\Service\Scanner\Health\HealthResponseException;
 use GuzzleHttp\Exception\GuzzleException;
 use JsonException;
 use Psr\Http\Message\ResponseInterface;
@@ -44,7 +45,7 @@ public function onStatsException(GuzzleException|JsonException $e): void;
      */
     public function onHealthResult(array $data): void;
 
-    public function onHealthException(GuzzleException|JsonException $e): void;
+    public function onHealthException(HealthResponseException $e): void;
 
     public function onScanAdminStart(): void;
 
diff --git a/tests/Unit/Service/Scanner/Health/HealthScannerTest.php b/tests/Unit/Service/Scanner/Health/HealthScannerTest.php
new file mode 100644
index 0000000..468a2e7
--- /dev/null
+++ b/tests/Unit/Service/Scanner/Health/HealthScannerTest.php
@@ -0,0 +1,40 @@
+<?php
+declare(strict_types=1);
+
+namespace Gared\EtherScan\Tests\Unit\Service\Scanner\Health;
+
+use Gared\EtherScan\Service\Scanner\Health\HealthScanner;
+use Gared\EtherScan\Service\ScannerServiceCallbackInterface;
+use Gared\EtherScan\Service\VersionRangeService;
+use GuzzleHttp\Client;
+use GuzzleHttp\Psr7\Response;
+use PHPUnit\Framework\TestCase;
+
+class HealthScannerTest extends TestCase
+{
+    public function testScanSuccess(): void
+    {
+        $client = $this->createMock(Client::class);
+        $client->expects(self::once())->method('get')->willReturn(new Response(200, [], '{"status":"pass","releaseId":"2.2.7"}'));
+        $versionRangeService = $this->createStub(VersionRangeService::class);
+        $callback = $this->createMock(ScannerServiceCallbackInterface::class);
+        $callback->expects(self::once())->method('onHealthResult');
+        $callback->expects(self::never())->method('onHealthException');
+
+        $scanner = new HealthScanner($versionRangeService);
+        $scanner->scan($client, 'http://example.com', $callback);
+    }
+
+    public function testScanException(): void
+    {
+        $client = $this->createMock(Client::class);
+        $client->expects(self::once())->method('get')->willReturn(new Response(200, [], '{"abc":"test"}'));
+        $versionRangeService = $this->createStub(VersionRangeService::class);
+        $callback = $this->createMock(ScannerServiceCallbackInterface::class);
+        $callback->expects(self::never())->method('onHealthResult');
+        $callback->expects(self::once())->method('onHealthException');
+
+        $scanner = new HealthScanner($versionRangeService);
+        $scanner->scan($client, 'http://example.com', $callback);
+    }
+}