diff --git a/composer.json b/composer.json
index f3e68090..220ccd9f 100644
--- a/composer.json
+++ b/composer.json
@@ -77,6 +77,7 @@
             "@composer -dtools/composer-require-checker update",
             "@composer -dtools/composer-unused update",
             "@composer -dtools/php-cs-fixer update",
+            "@composer -dtools/phpcpd update",
             "@composer -dtools/phpmd update",
             "@composer -dtools/psalm update",
             "@composer -dtools/infection update",
@@ -100,7 +101,8 @@
         "test:infection": "@php -d zend.assertions=1 -d assert.exception=1 -d display_errors=On -d error_reporting=-1 -d log_errors_max_len=0 -d memory_limit=-1 -d xdebug.mode=coverage -d pcov.enabled=1 -d pcov.directory=src tools/infection/vendor/infection/infection/bin/infection ",
         "test:phpmd": "@php tools/phpmd/vendor/phpmd/phpmd/src/bin/phpmd src ansi .phpmd.rules.dist.xml",
         "test:phpunit": "@php -d zend.assertions=1 -d assert.exception=1 -d display_errors=On -d error_reporting=-1 -d log_errors_max_len=0 -d memory_limit=-1 -d xdebug.mode=coverage -d pcov.enabled=1 -d pcov.directory=src vendor/phpunit/phpunit/phpunit",
-        "test:psalm": "@php tools/psalm/vendor/vimeo/psalm/psalm"
+        "test:psalm": "@php tools/psalm/vendor/vimeo/psalm/psalm",
+        "test:phpcpd": "@php tools/phpcpd/vendor/sebastian/phpcpd/phpcpd --exclude src/Core/Spec/SpecFactory.php --exclude src/Core/Serialization/DOM/NormalizerFactory.php --exclude src/Core/Serialization/JSON/NormalizerFactory.php --fuzzy src"
     },
     "scripts-descriptions": {
         "cs-fix": "Fix files according to coding standards.",
diff --git a/tools/phpcpd/.gitignore b/tools/phpcpd/.gitignore
new file mode 100644
index 00000000..2ea50ef7
--- /dev/null
+++ b/tools/phpcpd/.gitignore
@@ -0,0 +1,3 @@
+*
+!/.gitignore
+!/composer.json
diff --git a/tools/phpcpd/composer.json b/tools/phpcpd/composer.json
new file mode 100644
index 00000000..da391f6e
--- /dev/null
+++ b/tools/phpcpd/composer.json
@@ -0,0 +1,17 @@
+{
+    "name": "tools/phpcpd",
+    "description": "PHP Copy/Paste Detector",
+    "type": "metapackage",
+    "require-dev": {
+        "roave/security-advisories": "dev-latest",
+        "sebastian/phpcpd": "^6.0"
+    },
+    "prefer-stable": true,
+    "config": {
+        "allow-plugins": {
+            "composer/package-versions-deprecated": false
+        },
+        "preferred-install": "dist",
+        "sort-packages": true
+    }
+}