diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index de3085096..d6e8ba578 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -134,3 +134,25 @@ jobs:
 
       - name: "Composer Require Checker"
         run: "make composer-require-checker"
+
+  name-collision:
+    name: "Name Collision Detector"
+
+    runs-on: "ubuntu-latest"
+    timeout-minutes: 60
+
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v3
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: "8.2"
+
+      - name: "Install dependencies"
+        run: "composer install --no-interaction --no-progress"
+
+      - name: "Name Collision Detector"
+        run: "make name-collision"
diff --git a/Makefile b/Makefile
index 1bcca2c96..2dbc0c16e 100644
--- a/Makefile
+++ b/Makefile
@@ -71,3 +71,6 @@ phpstan-pro:
 
 composer-require-checker:
 	php build/composer-require-checker.phar check --config-file $(CURDIR)/build/composer-require-checker.json
+
+name-collision:
+	php vendor/bin/detect-collisions
diff --git a/collision-detector.json b/collision-detector.json
new file mode 100644
index 000000000..f76bb1a6f
--- /dev/null
+++ b/collision-detector.json
@@ -0,0 +1,14 @@
+{
+	"scanPaths": ["src", "build", "tests"],
+	"excludePaths": [
+		"tests/PHPStan/Analyser/data/parse-error.php",
+		"tests/PHPStan/Analyser/data/multipleParseErrors.php",
+		"tests/PHPStan/Parser/data/cleaning-1-before.php",
+		"tests/PHPStan/Parser/data/cleaning-1-after.php",
+		"tests/PHPStan/Rules/Functions/data/duplicate-function.php",
+		"tests/PHPStan/Rules/Classes/data/duplicate-class.php",
+		"tests/notAutoloaded",
+		"tests/PHPStan/Rules/Functions/data/define-bug-3349.php",
+		"tests/PHPStan/Levels/data/stubs/function.php"
+	]
+}
diff --git a/composer.json b/composer.json
index e721e7770..cf646ad29 100644
--- a/composer.json
+++ b/composer.json
@@ -60,7 +60,8 @@
 		"phpstan/phpstan-phpunit": "^1.0",
 		"phpstan/phpstan-strict-rules": "^1.5.1",
 		"phpunit/phpunit": "^9.5.4",
-		"rector/rector": "^0.17"
+		"rector/rector": "^0.17",
+		"shipmonk/name-collision-detector": "dev-master"
 	},
 	"config": {
 		"platform": {
diff --git a/composer.lock b/composer.lock
index 42990e5bf..17741ed8a 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": "15370fe06e70912dc718f07a86da0ef0",
+    "content-hash": "66a1ad030befadba6ebd1b506ba58cd2",
     "packages": [
         {
             "name": "clue/ndjson-react",
@@ -6561,6 +6561,63 @@
             ],
             "time": "2020-09-28T06:39:44+00:00"
         },
+        {
+            "name": "shipmonk/name-collision-detector",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/shipmonk-rnd/name-collision-detector.git",
+                "reference": "6c9c6bc0cdd1d56df80ad145147ca22618bf9d77"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/shipmonk-rnd/name-collision-detector/zipball/6c9c6bc0cdd1d56df80ad145147ca22618bf9d77",
+                "reference": "6c9c6bc0cdd1d56df80ad145147ca22618bf9d77",
+                "shasum": ""
+            },
+            "require": {
+                "ext-tokenizer": "*",
+                "nette/schema": "^1.1.0",
+                "php": "^7.2 || ^8.0"
+            },
+            "require-dev": {
+                "editorconfig-checker/editorconfig-checker": "^10.3.0",
+                "ergebnis/composer-normalize": "^2.19",
+                "phpstan/phpstan": "^1.8.7",
+                "phpstan/phpstan-phpunit": "^1.1.1",
+                "phpstan/phpstan-strict-rules": "^1.2.3",
+                "phpunit/phpunit": "^8.5.28 || ^9.5.20",
+                "slevomat/coding-standard": "^8.0.1"
+            },
+            "default-branch": true,
+            "bin": [
+                "bin/detect-collisions"
+            ],
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "ShipMonk\\NameCollision\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Simple tool to find ambiguous classes or any other name duplicates within your project.",
+            "keywords": [
+                "ambiguous",
+                "autoload",
+                "autoloading",
+                "classname",
+                "collision",
+                "namespace"
+            ],
+            "support": {
+                "issues": "https://github.com/shipmonk-rnd/name-collision-detector/issues",
+                "source": "https://github.com/shipmonk-rnd/name-collision-detector/tree/master"
+            },
+            "time": "2023-09-01T13:43:26+00:00"
+        },
         {
             "name": "theseer/tokenizer",
             "version": "1.2.1",