diff --git a/.gitignore b/.gitignore
index f3ff6df..5c1a4fb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,5 @@
 /coveralls-upload.json
 /phpunit.xml
 /vendor/
+/.phpunit.result.cache
+/.phpcs-cache
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 7953e33..fbb49ec 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
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     },
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+        "php": "^7.3 || ~8.0.0",
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@@ -38,7 +38,8 @@
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     "require-dev": {
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-        "phpunit/phpunit": "^7.5.15"
+        "phpspec/prophecy-phpunit": "^2.0",
+        "phpunit/phpunit": "^9.3"
     },
     "autoload": {
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diff --git a/composer.lock b/composer.lock
index a2ada76..0186fc8 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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@@ -1577,28 +1577,29 @@
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+            "version": "2.0.1",
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                 "url": "https://github.com/phar-io/manifest.git",
-                "reference": "7761fcacf03b4d4f16e7ccb606d4879ca431fcf4"
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-                "reference": "7761fcacf03b4d4f16e7ccb606d4879ca431fcf4",
+                "url": "https://api.github.com/repos/phar-io/manifest/zipball/85265efd3af7ba3ca4b2a2c34dbfc5788dd29133",
+                "reference": "85265efd3af7ba3ca4b2a2c34dbfc5788dd29133",
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             "require": {
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                 "ext-phar": "*",
-                "phar-io/version": "^2.0",
-                "php": "^5.6 || ^7.0"
+                "ext-xmlwriter": "*",
+                "phar-io/version": "^3.0.1",
+                "php": "^7.2 || ^8.0"
             },
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+                    "dev-master": "2.0.x-dev"
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@@ -1632,24 +1633,24 @@
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-            "time": "2018-07-08T19:23:20+00:00"
+            "time": "2020-06-27T14:33:11+00:00"
         },
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-            "version": "2.0.1",
+            "version": "3.1.0",
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-                "reference": "45a2ec53a73c70ce41d55cedef9063630abaf1b6"
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-                "reference": "45a2ec53a73c70ce41d55cedef9063630abaf1b6",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/bae7c545bef187884426f042434e561ab1ddb182",
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             },
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-                "php": "^5.6 || ^7.0"
+                "php": "^7.2 || ^8.0"
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@@ -1681,9 +1682,9 @@
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-                "source": "https://github.com/phar-io/version/tree/master"
+                "source": "https://github.com/phar-io/version/tree/3.1.0"
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-            "time": "2018-07-08T19:19:57+00:00"
+            "time": "2021-02-23T14:00:09+00:00"
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@@ -1910,6 +1911,58 @@
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             "time": "2021-03-17T13:42:18+00:00"
         },
+        {
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+            "version": "v2.0.1",
+            "source": {
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+                "url": "https://github.com/phpspec/prophecy-phpunit.git",
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+            "dist": {
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+                "reference": "2d7a9df55f257d2cba9b1d0c0963a54960657177",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.3 || ^8",
+                "phpspec/prophecy": "^1.3",
+                "phpunit/phpunit": "^9.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Prophecy\\PhpUnit\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Christophe Coevoet",
+                    "email": "stof@notk.org"
+                }
+            ],
+            "description": "Integrating the Prophecy mocking library in PHPUnit test cases",
+            "homepage": "http://phpspec.net",
+            "keywords": [
+                "phpunit",
+                "prophecy"
+            ],
+            "support": {
+                "issues": "https://github.com/phpspec/prophecy-phpunit/issues",
+                "source": "https://github.com/phpspec/prophecy-phpunit/tree/v2.0.1"
+            },
+            "time": "2020-07-09T08:33:42+00:00"
+        },
         {
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             "version": "0.4.9",
@@ -1965,40 +2018,44 @@
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         {
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+            "version": "9.2.6",
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-                "reference": "807e6013b00af69b6c5d9ceb4282d0393dbb9d8d"
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-                "reference": "807e6013b00af69b6c5d9ceb4282d0393dbb9d8d",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/f6293e1b30a2354e8428e004689671b83871edde",
+                "reference": "f6293e1b30a2354e8428e004689671b83871edde",
                 "shasum": ""
             },
             "require": {
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+                "ext-libxml": "*",
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-                "php": "^7.1",
-                "phpunit/php-file-iterator": "^2.0",
-                "phpunit/php-text-template": "^1.2.1",
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-                "sebastian/environment": "^3.1 || ^4.0",
-                "sebastian/version": "^2.0.1",
-                "theseer/tokenizer": "^1.1"
+                "nikic/php-parser": "^4.10.2",
+                "php": ">=7.3",
+                "phpunit/php-file-iterator": "^3.0.3",
+                "phpunit/php-text-template": "^2.0.2",
+                "sebastian/code-unit-reverse-lookup": "^2.0.2",
+                "sebastian/complexity": "^2.0",
+                "sebastian/environment": "^5.1.2",
+                "sebastian/lines-of-code": "^1.0.3",
+                "sebastian/version": "^3.0.1",
+                "theseer/tokenizer": "^1.2.0"
             },
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-                "phpunit/phpunit": "^7.0"
+                "phpunit/phpunit": "^9.3"
             },
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+                "ext-pcov": "*",
+                "ext-xdebug": "*"
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@@ -2026,34 +2083,40 @@
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-                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/master"
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.6"
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-            "time": "2018-10-31T16:06:48+00:00"
+            "funding": [
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+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-03-28T07:26:59+00:00"
         },
         {
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-            "version": "2.0.3",
+            "version": "3.0.5",
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                 "url": "https://github.com/sebastianbergmann/php-file-iterator.git",
-                "reference": "4b49fb70f067272b659ef0174ff9ca40fdaa6357"
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-                "reference": "4b49fb70f067272b659ef0174ff9ca40fdaa6357",
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-                "php": ">=7.1"
+                "php": ">=7.3"
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+                "phpunit/phpunit": "^9.3"
             },
             "type": "library",
             "extra": {
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-                    "dev-master": "2.0.x-dev"
+                    "dev-master": "3.0-dev"
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@@ -2080,7 +2143,7 @@
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-                "source": "https://github.com/sebastianbergmann/php-file-iterator/tree/2.0.3"
+                "source": "https://github.com/sebastianbergmann/php-file-iterator/tree/3.0.5"
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@@ -2088,26 +2151,38 @@
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                 }
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-            "time": "2020-11-30T08:25:21+00:00"
+            "time": "2020-09-28T05:57:25+00:00"
         },
         {
-            "name": "phpunit/php-text-template",
-            "version": "1.2.1",
+            "name": "phpunit/php-invoker",
+            "version": "3.1.1",
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-                "url": "https://github.com/sebastianbergmann/php-text-template.git",
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+                "php": ">=7.3"
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+            "suggest": {
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+                }
+            },
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@@ -2124,41 +2199,47 @@
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                 }
             ],
-            "description": "Simple template engine.",
-            "homepage": "https://github.com/sebastianbergmann/php-text-template/",
+            "description": "Invoke callables with a timeout",
+            "homepage": "https://github.com/sebastianbergmann/php-invoker/",
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+                "process"
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-                "source": "https://github.com/sebastianbergmann/php-text-template/tree/1.2.1"
+                "issues": "https://github.com/sebastianbergmann/php-invoker/issues",
+                "source": "https://github.com/sebastianbergmann/php-invoker/tree/3.1.1"
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-            "time": "2015-06-21T13:50:34+00:00"
+            "funding": [
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+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-09-28T05:58:55+00:00"
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         {
-            "name": "phpunit/php-timer",
-            "version": "2.1.3",
+            "name": "phpunit/php-text-template",
+            "version": "2.0.4",
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             },
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@@ -2177,14 +2258,14 @@
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                 }
             ],
-            "description": "Utility class for timing",
-            "homepage": "https://github.com/sebastianbergmann/php-timer/",
+            "description": "Simple template engine.",
+            "homepage": "https://github.com/sebastianbergmann/php-text-template/",
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-                "timer"
+                "template"
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-                "source": "https://github.com/sebastianbergmann/php-timer/tree/2.1.3"
+                "issues": "https://github.com/sebastianbergmann/php-text-template/issues",
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@@ -2192,33 +2273,32 @@
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-            "time": "2020-11-30T08:20:02+00:00"
+            "time": "2020-10-26T05:33:50+00:00"
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-            "version": "3.1.2",
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@@ -2233,17 +2313,18 @@
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-                    "email": "sebastian@phpunit.de"
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
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-            "description": "Wrapper around PHP's tokenizer extension.",
-            "homepage": "https://github.com/sebastianbergmann/php-token-stream/",
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+            "homepage": "https://github.com/sebastianbergmann/php-timer/",
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@@ -2251,58 +2332,59 @@
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-            "time": "2020-11-30T08:38:46+00:00"
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@@ -2703,7 +2970,7 @@
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             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.0-dev"
+                    "dev-master": "5.0-dev"
                 }
             },
             "autoload": {
@@ -2728,36 +2995,99 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/global-state/issues",
-                "source": "https://github.com/sebastianbergmann/global-state/tree/2.0.0"
+                "source": "https://github.com/sebastianbergmann/global-state/tree/5.0.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-10-26T15:55:19+00:00"
+        },
+        {
+            "name": "sebastian/lines-of-code",
+            "version": "1.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/lines-of-code.git",
+                "reference": "c1c2e997aa3146983ed888ad08b15470a2e22ecc"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/lines-of-code/zipball/c1c2e997aa3146983ed888ad08b15470a2e22ecc",
+                "reference": "c1c2e997aa3146983ed888ad08b15470a2e22ecc",
+                "shasum": ""
+            },
+            "require": {
+                "nikic/php-parser": "^4.6",
+                "php": ">=7.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0-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 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",
+                "source": "https://github.com/sebastianbergmann/lines-of-code/tree/1.0.3"
             },
-            "time": "2017-04-27T15:39:26+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-28T06:42:11+00:00"
         },
         {
             "name": "sebastian/object-enumerator",
-            "version": "3.0.4",
+            "version": "4.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/object-enumerator.git",
-                "reference": "e67f6d32ebd0c749cf9d1dbd9f226c727043cdf2"
+                "reference": "5c9eeac41b290a3712d88851518825ad78f45c71"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/e67f6d32ebd0c749cf9d1dbd9f226c727043cdf2",
-                "reference": "e67f6d32ebd0c749cf9d1dbd9f226c727043cdf2",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/5c9eeac41b290a3712d88851518825ad78f45c71",
+                "reference": "5c9eeac41b290a3712d88851518825ad78f45c71",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.0",
-                "sebastian/object-reflector": "^1.1.1",
-                "sebastian/recursion-context": "^3.0"
+                "php": ">=7.3",
+                "sebastian/object-reflector": "^2.0",
+                "sebastian/recursion-context": "^4.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^6.0"
+                "phpunit/phpunit": "^9.3"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.0.x-dev"
+                    "dev-master": "4.0-dev"
                 }
             },
             "autoload": {
@@ -2779,7 +3109,7 @@
             "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
             "support": {
                 "issues": "https://github.com/sebastianbergmann/object-enumerator/issues",
-                "source": "https://github.com/sebastianbergmann/object-enumerator/tree/3.0.4"
+                "source": "https://github.com/sebastianbergmann/object-enumerator/tree/4.0.4"
             },
             "funding": [
                 {
@@ -2787,32 +3117,32 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-11-30T07:40:27+00:00"
+            "time": "2020-10-26T13:12:34+00:00"
         },
         {
             "name": "sebastian/object-reflector",
-            "version": "1.1.2",
+            "version": "2.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/object-reflector.git",
-                "reference": "9b8772b9cbd456ab45d4a598d2dd1a1bced6363d"
+                "reference": "b4f479ebdbf63ac605d183ece17d8d7fe49c15c7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/9b8772b9cbd456ab45d4a598d2dd1a1bced6363d",
-                "reference": "9b8772b9cbd456ab45d4a598d2dd1a1bced6363d",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/b4f479ebdbf63ac605d183ece17d8d7fe49c15c7",
+                "reference": "b4f479ebdbf63ac605d183ece17d8d7fe49c15c7",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.0"
+                "php": ">=7.3"
             },
             "require-dev": {
-                "phpunit/phpunit": "^6.0"
+                "phpunit/phpunit": "^9.3"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.1-dev"
+                    "dev-master": "2.0-dev"
                 }
             },
             "autoload": {
@@ -2834,7 +3164,7 @@
             "homepage": "https://github.com/sebastianbergmann/object-reflector/",
             "support": {
                 "issues": "https://github.com/sebastianbergmann/object-reflector/issues",
-                "source": "https://github.com/sebastianbergmann/object-reflector/tree/1.1.2"
+                "source": "https://github.com/sebastianbergmann/object-reflector/tree/2.0.4"
             },
             "funding": [
                 {
@@ -2842,32 +3172,32 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-11-30T07:37:18+00:00"
+            "time": "2020-10-26T13:14:26+00:00"
         },
         {
             "name": "sebastian/recursion-context",
-            "version": "3.0.1",
+            "version": "4.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/recursion-context.git",
-                "reference": "367dcba38d6e1977be014dc4b22f47a484dac7fb"
+                "reference": "cd9d8cf3c5804de4341c283ed787f099f5506172"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/367dcba38d6e1977be014dc4b22f47a484dac7fb",
-                "reference": "367dcba38d6e1977be014dc4b22f47a484dac7fb",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/cd9d8cf3c5804de4341c283ed787f099f5506172",
+                "reference": "cd9d8cf3c5804de4341c283ed787f099f5506172",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.0"
+                "php": ">=7.3"
             },
             "require-dev": {
-                "phpunit/phpunit": "^6.0"
+                "phpunit/phpunit": "^9.3"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.0.x-dev"
+                    "dev-master": "4.0-dev"
                 }
             },
             "autoload": {
@@ -2897,7 +3227,7 @@
             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
             "support": {
                 "issues": "https://github.com/sebastianbergmann/recursion-context/issues",
-                "source": "https://github.com/sebastianbergmann/recursion-context/tree/3.0.1"
+                "source": "https://github.com/sebastianbergmann/recursion-context/tree/4.0.4"
             },
             "funding": [
                 {
@@ -2905,29 +3235,32 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-11-30T07:34:24+00:00"
+            "time": "2020-10-26T13:17:30+00:00"
         },
         {
             "name": "sebastian/resource-operations",
-            "version": "2.0.2",
+            "version": "3.0.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/resource-operations.git",
-                "reference": "31d35ca87926450c44eae7e2611d45a7a65ea8b3"
+                "reference": "0f4443cb3a1d92ce809899753bc0d5d5a8dd19a8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/31d35ca87926450c44eae7e2611d45a7a65ea8b3",
-                "reference": "31d35ca87926450c44eae7e2611d45a7a65ea8b3",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/0f4443cb3a1d92ce809899753bc0d5d5a8dd19a8",
+                "reference": "0f4443cb3a1d92ce809899753bc0d5d5a8dd19a8",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.1"
+                "php": ">=7.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.0-dev"
+                    "dev-master": "3.0-dev"
                 }
             },
             "autoload": {
@@ -2949,7 +3282,7 @@
             "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
             "support": {
                 "issues": "https://github.com/sebastianbergmann/resource-operations/issues",
-                "source": "https://github.com/sebastianbergmann/resource-operations/tree/2.0.2"
+                "source": "https://github.com/sebastianbergmann/resource-operations/tree/3.0.3"
             },
             "funding": [
                 {
@@ -2957,29 +3290,85 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-11-30T07:30:19+00:00"
+            "time": "2020-09-28T06:45:17+00:00"
+        },
+        {
+            "name": "sebastian/type",
+            "version": "2.3.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/type.git",
+                "reference": "0d1c587401514d17e8f9258a27e23527cb1b06c1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/0d1c587401514d17e8f9258a27e23527cb1b06c1",
+                "reference": "0d1c587401514d17e8f9258a27e23527cb1b06c1",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.3-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",
+                "source": "https://github.com/sebastianbergmann/type/tree/2.3.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-06-04T13:02:07+00:00"
         },
         {
             "name": "sebastian/version",
-            "version": "2.0.1",
+            "version": "3.0.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/version.git",
-                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
+                "reference": "c6c1022351a901512170118436c764e473f6de8c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/99732be0ddb3361e16ad77b68ba41efc8e979019",
-                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/c6c1022351a901512170118436c764e473f6de8c",
+                "reference": "c6c1022351a901512170118436c764e473f6de8c",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.6"
+                "php": ">=7.3"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.0.x-dev"
+                    "dev-master": "3.0-dev"
                 }
             },
             "autoload": {
@@ -3002,9 +3391,15 @@
             "homepage": "https://github.com/sebastianbergmann/version",
             "support": {
                 "issues": "https://github.com/sebastianbergmann/version/issues",
-                "source": "https://github.com/sebastianbergmann/version/tree/master"
+                "source": "https://github.com/sebastianbergmann/version/tree/3.0.2"
             },
-            "time": "2016-10-03T07:35:21+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-09-28T06:39:44+00:00"
         },
         {
             "name": "slevomat/coding-standard",
@@ -3372,7 +3767,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^7.3",
+        "php": "^7.3 || ~8.0.0",
         "ext-json": "*"
     },
     "platform-dev": [],
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 3f9750f..bae70e1 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,17 +1,13 @@
 <?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"
-         colors="true">
-    <testsuites>
-        <testsuite name="LaminasApiProblem Module Tests">
-            <directory>./test</directory>
-        </testsuite>
-    </testsuites>
-
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">./src</directory>
-        </whitelist>
-    </filter>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd" bootstrap="vendor/autoload.php" colors="true">
+  <coverage processUncoveredFiles="true">
+    <include>
+      <directory suffix=".php">./src</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="LaminasApiProblem Module Tests">
+      <directory>./test</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>
diff --git a/src/ApiProblem.php b/src/ApiProblem.php
index 4c00bcf..150a097 100644
--- a/src/ApiProblem.php
+++ b/src/ApiProblem.php
@@ -298,7 +298,7 @@ protected function getTitle()
             return $this->problemStatusTitles[$this->status];
         }
 
-        if ($this->detail instanceof Throwable || $this->detail instanceof Exception) {
+        if ($this->detail instanceof Throwable) {
             return get_class($this->detail);
         }
 
diff --git a/test/ApiProblemResponseTest.php b/test/ApiProblemResponseTest.php
index d84c84f..cae25ff 100644
--- a/test/ApiProblemResponseTest.php
+++ b/test/ApiProblemResponseTest.php
@@ -27,7 +27,7 @@ public function testApiProblemResponseSetsStatusCodeAndReasonPhrase()
     {
         $response = new ApiProblemResponse(new ApiProblem(400, 'Random error'));
         $this->assertEquals(400, $response->getStatusCode());
-        $this->assertInternalType('string', $response->getReasonPhrase());
+        $this->assertIsString($response->getReasonPhrase());
         $this->assertNotEmpty($response->getReasonPhrase());
         $this->assertEquals('bad request', strtolower($response->getReasonPhrase()));
     }
@@ -77,6 +77,6 @@ public function testComposeApiProblemIsAccessible()
     public function testOverridesReasonPhraseIfStatusCodeIsUnknown()
     {
         $response = new ApiProblemResponse(new ApiProblem(7, 'Random error'));
-        $this->assertContains('Internal Server Error', $response->getReasonPhrase());
+        $this->assertStringContainsString('Internal Server Error', $response->getReasonPhrase());
     }
 }
diff --git a/test/ApiProblemTest.php b/test/ApiProblemTest.php
index 8b2874e..f594f0c 100644
--- a/test/ApiProblemTest.php
+++ b/test/ApiProblemTest.php
@@ -87,7 +87,7 @@ public function testExceptionsCanTriggerInclusionOfStackTraceInDetails()
         $apiProblem->setDetailIncludesStackTrace(true);
         $payload = $apiProblem->toArray();
         $this->assertArrayHasKey('trace', $payload);
-        $this->assertInternalType('array', $payload['trace']);
+        $this->assertIsArray($payload['trace']);
         $this->assertEquals($exception->getTrace(), $payload['trace']);
     }
 
@@ -100,7 +100,7 @@ public function testExceptionsCanTriggerInclusionOfNestedExceptions()
         $apiProblem->setDetailIncludesStackTrace(true);
         $payload = $apiProblem->toArray();
         $this->assertArrayHasKey('exception_stack', $payload);
-        $this->assertInternalType('array', $payload['exception_stack']);
+        $this->assertIsArray($payload['exception_stack']);
         $expected = [
             [
                 'code'    => $exceptionChild->getCode(),
diff --git a/test/Listener/ApiProblemListenerTest.php b/test/Listener/ApiProblemListenerTest.php
index fff0252..32c3db9 100644
--- a/test/Listener/ApiProblemListenerTest.php
+++ b/test/Listener/ApiProblemListenerTest.php
@@ -11,11 +11,14 @@
 use Laminas\Mvc\MvcEvent;
 use Laminas\Stdlib\RequestInterface;
 use PHPUnit\Framework\TestCase;
+use Prophecy\PhpUnit\ProphecyTrait;
 use TypeError;
 
 class ApiProblemListenerTest extends TestCase
 {
-    protected function setUp()
+    use ProphecyTrait;
+
+    protected function setUp(): void
     {
         $this->event = new MvcEvent();
         $this->event->setError('this is an error event');
diff --git a/test/Listener/RenderErrorListenerTest.php b/test/Listener/RenderErrorListenerTest.php
index f3f2384..baf179a 100644
--- a/test/Listener/RenderErrorListenerTest.php
+++ b/test/Listener/RenderErrorListenerTest.php
@@ -19,7 +19,7 @@ class RenderErrorListenerTest extends TestCase
     /** @var RenderErrorListener */
     protected $listener;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->listener = new RenderErrorListener();
     }
@@ -51,8 +51,8 @@ public function testOnRenderErrorCreatesAnApiProblemResponse()
 
         $this->assertEquals(406, $content['status']);
         $this->assertEquals('Not Acceptable', $content['title']);
-        $this->assertContains('www.w3.org', $content['describedBy']);
-        $this->assertContains('accept', $content['detail']);
+        $this->assertStringContainsString('www.w3.org', $content['describedBy']);
+        $this->assertStringContainsString('accept', $content['detail']);
     }
 
     public function testOnRenderErrorCreatesAnApiProblemResponseFromException()
@@ -86,10 +86,10 @@ public function testOnRenderErrorCreatesAnApiProblemResponseFromException()
 
         $this->assertEquals(400, $content['status']);
         $this->assertEquals('Unexpected error', $content['title']);
-        $this->assertContains('www.w3.org', $content['describedBy']);
+        $this->assertStringContainsString('www.w3.org', $content['describedBy']);
         $this->assertEquals('exception', $content['detail']);
 
-        $this->assertInternalType('array', $content['details']);
+        $this->assertIsArray($content['details']);
         $details = $content['details'];
         $this->assertArrayHasKey('code', $details);
         $this->assertArrayHasKey('message', $details);
@@ -132,10 +132,10 @@ public function testOnRenderErrorCreatesAnApiProblemResponseFromThrowable()
 
         $this->assertEquals(400, $content['status']);
         $this->assertEquals('Unexpected error', $content['title']);
-        $this->assertContains('www.w3.org', $content['describedBy']);
+        $this->assertStringContainsString('www.w3.org', $content['describedBy']);
         $this->assertEquals('throwable', $content['detail']);
 
-        $this->assertInternalType('array', $content['details']);
+        $this->assertIsArray($content['details']);
         $details = $content['details'];
         $this->assertArrayHasKey('code', $details);
         $this->assertArrayHasKey('message', $details);
diff --git a/test/Listener/SendApiProblemResponseListenerTest.php b/test/Listener/SendApiProblemResponseListenerTest.php
index dfc3187..af0c03c 100644
--- a/test/Listener/SendApiProblemResponseListenerTest.php
+++ b/test/Listener/SendApiProblemResponseListenerTest.php
@@ -18,7 +18,7 @@
 
 class SendApiProblemResponseListenerTest extends TestCase
 {
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->exception  = new DomainException('Random error', 400);
         $this->apiProblem = new ApiProblem(400, $this->exception);
@@ -55,10 +55,10 @@ public function testSendContentDoesNotRenderExceptionsByDefault()
         ob_start();
         $this->listener->sendContent($this->event);
         $contents = ob_get_clean();
-        $this->assertInternalType('string', $contents);
+        $this->assertIsString($contents);
         $data = json_decode($contents, true);
-        $this->assertNotContains("\n", $data['detail']);
-        $this->assertNotContains($this->exception->getTraceAsString(), $data['detail']);
+        $this->assertStringNotContainsString("\n", $data['detail']);
+        $this->assertStringNotContainsString($this->exception->getTraceAsString(), $data['detail']);
     }
 
     public function testEnablingDisplayExceptionFlagRendersExceptionStackTrace()
@@ -67,10 +67,10 @@ public function testEnablingDisplayExceptionFlagRendersExceptionStackTrace()
         ob_start();
         $this->listener->sendContent($this->event);
         $contents = ob_get_clean();
-        $this->assertInternalType('string', $contents);
+        $this->assertIsString($contents);
         $data = json_decode($contents, true);
         $this->assertArrayHasKey('trace', $data);
-        $this->assertInternalType('array', $data['trace']);
+        $this->assertIsArray($data['trace']);
         $this->assertGreaterThanOrEqual(1, count($data['trace']));
     }
 
@@ -80,7 +80,7 @@ public function testSendContentDoesNothingIfEventDoesNotContainApiProblemRespons
         ob_start();
         $this->listener->sendContent($this->event);
         $contents = ob_get_clean();
-        $this->assertInternalType('string', $contents);
+        $this->assertIsString($contents);
         $this->assertEmpty($contents);
     }
 
diff --git a/test/ModuleTest.php b/test/ModuleTest.php
index 0252f03..c30f375 100644
--- a/test/ModuleTest.php
+++ b/test/ModuleTest.php
@@ -15,9 +15,7 @@
 
 class ModuleTest extends TestCase
 {
-    /**
-     * @return EventManager
-     */
+    /** @return EventManager */
     public function marshalEventManager()
     {
         $r = new ReflectionClass(EventManager::class);
@@ -49,9 +47,7 @@ public function testOnBootstrap()
         $module->onBootstrap($event);
     }
 
-    /**
-     * @return null|ApiProblemListener|SendResponseListener|SendApiProblemResponseListener
-     */
+    /** @return null|ApiProblemListener|SendResponseListener|SendApiProblemResponseListener */
     public function serviceLocator(string $service)
     {
         switch ($service) {
diff --git a/test/View/ApiProblemRendererTest.php b/test/View/ApiProblemRendererTest.php
index e6e1525..d88c6cc 100644
--- a/test/View/ApiProblemRendererTest.php
+++ b/test/View/ApiProblemRendererTest.php
@@ -13,7 +13,7 @@
 
 class ApiProblemRendererTest extends TestCase
 {
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->renderer = new ApiProblemRenderer();
     }
@@ -43,7 +43,7 @@ public function testCanHintToApiProblemToRenderStackTrace()
         $test = $this->renderer->render($model);
         $test = json_decode($test, true);
         $this->assertArrayHasKey('trace', $test);
-        $this->assertInternalType('array', $test['trace']);
+        $this->assertIsArray($test['trace']);
         $this->assertGreaterThanOrEqual(1, count($test['trace']));
     }
 }
diff --git a/test/View/ApiProblemStrategyTest.php b/test/View/ApiProblemStrategyTest.php
index 7c62552..24347b8 100644
--- a/test/View/ApiProblemStrategyTest.php
+++ b/test/View/ApiProblemStrategyTest.php
@@ -8,13 +8,14 @@
 use Laminas\ApiTools\ApiProblem\View\ApiProblemStrategy;
 use Laminas\Http\Response;
 use Laminas\View\Model\JsonModel;
+use Laminas\View\Model\ModelInterface as Model;
 use Laminas\View\Model\ViewModel;
 use Laminas\View\ViewEvent;
 use PHPUnit\Framework\TestCase;
 
 class ApiProblemStrategyTest extends TestCase
 {
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->response = new Response();
         $this->event    = new ViewEvent();
@@ -36,6 +37,7 @@ public function invalidViewModels()
 
     /**
      * @dataProvider invalidViewModels
+     * @param null|Model $model
      */
     public function testSelectRendererReturnsNullIfModelIsNotAnApiProblemModel(?ViewModel $model)
     {