diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..da528d2
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,53 @@
+name: Tests
+
+on:
+    push:
+    pull_request:
+    schedule:
+        - cron:  '0 1 * * *'
+
+jobs:
+    test:
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                php: [ '8.1', '8.2', '8.3' ]
+        steps:
+            - uses: actions/checkout@v4
+            - name: Setup PHP with tools
+              uses: shivammathur/setup-php@v2
+              with:
+                  php-version: ${{ matrix.php }}
+                  tools: composer
+            - run: composer install
+            - run: composer test
+
+    format:
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                php: [ '8.1' ]
+        steps:
+            - uses: actions/checkout@v4
+            - name: Setup PHP with tools
+              uses: shivammathur/setup-php@v2
+              with:
+                  php-version: ${{ matrix.php }}
+                  tools: composer
+            - run: composer install
+            - run: composer format
+
+    analyse:
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                php: [ '8.1' ]
+        steps:
+            - uses: actions/checkout@v4
+            - name: Setup PHP with tools
+              uses: shivammathur/setup-php@v2
+              with:
+                  php-version: ${{ matrix.php }}
+                  tools: composer
+            - run: composer install
+            - run: composer analyse
diff --git a/composer.json b/composer.json
index ea18c0c..2d7bcf5 100644
--- a/composer.json
+++ b/composer.json
@@ -20,17 +20,23 @@
     "require": {
         "php": "^7.4|^8.0",
         "ext-json": "*",
-        "phpstan/phpstan": "^1.0"
+        "phpstan/phpstan": "^1.0|^2.0"
     },
     "require-dev": {
         "fakerphp/faker": "^1.21",
-        "laravel/pint": "^1.2"
+        "laravel/pint": "^1.2",
+        "phpunit/phpunit": "^9.6"
     },
     "autoload": {
         "psr-4": {
             "Swis\\PHPStan\\Reflection\\": "src"
         }
     },
+    "autoload-dev": {
+        "psr-4": {
+            "Swis\\PHPStan\\Reflection\\Tests\\": "tests"
+        }
+    },
     "extra": {
         "phpstan": {
             "includes": [
@@ -40,7 +46,8 @@
     },
     "scripts": {
         "analyse": "vendor/bin/phpstan analyse",
-        "format": "vendor/bin/pint"
+        "format": "vendor/bin/pint",
+        "test": "vendor/bin/phpunit"
     },
     "config": {
         "sort-packages": true
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
new file mode 100644
index 0000000..fc10755
--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.5/phpunit.xsd"
+         bootstrap="vendor/autoload.php"
+         beStrictAboutOutputDuringTests="true"
+         beStrictAboutTodoAnnotatedTests="true"
+         verbose="true">
+    <testsuites>
+        <testsuite name="default">
+            <directory suffix="Test.php">tests</directory>
+        </testsuite>
+    </testsuites>
+
+    <coverage processUncoveredFiles="true">
+        <include>
+            <directory suffix=".php">src</directory>
+        </include>
+    </coverage>
+</phpunit>
diff --git a/src/FakerProviderReflectionExtension.php b/src/FakerProviderReflectionExtension.php
index 76dec5f..34d41ae 100644
--- a/src/FakerProviderReflectionExtension.php
+++ b/src/FakerProviderReflectionExtension.php
@@ -11,7 +11,7 @@
 use PHPStan\Reflection\PropertyReflection;
 use PHPStan\Reflection\ReflectionProvider;
 
-class FakerProviderReflectionExtension implements PropertiesClassReflectionExtension, MethodsClassReflectionExtension
+class FakerProviderReflectionExtension implements MethodsClassReflectionExtension, PropertiesClassReflectionExtension
 {
     protected ReflectionProvider $reflectionProvider;
 
@@ -51,7 +51,7 @@ public function getMethod(ClassReflection $classReflection, string $methodName):
         if ($method === null) {
             // This should never happen, because hasMethod() should always be
             // called first.
-            throw new \PHPStan\ShouldNotHappenException();
+            throw new \PHPStan\ShouldNotHappenException;
         }
 
         return $method;
@@ -69,7 +69,7 @@ public function getProperty(ClassReflection $classReflection, string $propertyNa
         if ($property === null) {
             // This should never happen, because hasProperty() should always be
             // called first.
-            throw new \PHPStan\ShouldNotHappenException();
+            throw new \PHPStan\ShouldNotHappenException;
         }
 
         return $property;
@@ -102,8 +102,8 @@ protected function findMethod(ClassReflection $classReflection, string $methodNa
             foreach ($this->providerClasses as $providerClass) {
                 $providerReflection = $this->reflectionProvider->getClass($providerClass);
                 try {
-                    $methodReflection = $providerReflection->getMethod($methodName, new OutOfClassScope());
-                    if (!$methodReflection->isStatic() && $methodReflection->isPublic()) {
+                    $methodReflection = $providerReflection->getMethod($methodName, new OutOfClassScope);
+                    if (! $methodReflection->isStatic() && $methodReflection->isPublic()) {
                         return $methodReflection;
                     }
                 } catch (MissingMethodFromReflectionException $e) {
diff --git a/tests/BookProvider.php b/tests/BookProvider.php
new file mode 100644
index 0000000..0315be8
--- /dev/null
+++ b/tests/BookProvider.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace Swis\PHPStan\Reflection\Tests;
+
+use Faker\Provider\Base;
+
+class BookProvider extends Base
+{
+    public function customBookIsbn(): string
+    {
+        return $this->generator->ean13();
+    }
+}
diff --git a/tests/FakerProviderReflectionExtensionTest.php b/tests/FakerProviderReflectionExtensionTest.php
new file mode 100644
index 0000000..321426b
--- /dev/null
+++ b/tests/FakerProviderReflectionExtensionTest.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace Swis\PHPStan\Reflection\Tests;
+
+use Faker;
+use PHPStan\Testing\PHPStanTestCase;
+use Swis\PHPStan\Reflection\FakerProviderReflectionExtension;
+
+class FakerProviderReflectionExtensionTest extends PHPStanTestCase
+{
+    public function testProviderCustomDataIsAvailableOnFakerGenerator(): void
+    {
+        $faker = new Faker\Generator;
+        $faker->addProvider(new BookProvider($faker));
+
+        $reflectionProvider = self::createReflectionProvider();
+        $sut = new FakerProviderReflectionExtension($reflectionProvider, [BookProvider::class]);
+
+        $classReflection = $reflectionProvider->getClass(Faker\Generator::class);
+
+        $this->assertTrue($sut->hasMethod($classReflection, 'customBookIsbn'));
+        $this->assertTrue($sut->hasProperty($classReflection, 'customBookIsbn'));
+    }
+
+    public function testProviderCustomDataIsNotAvailabledOutsideOfFakerGenerator(): void
+    {
+        $reflectionProvider = self::createReflectionProvider();
+        $sut = new FakerProviderReflectionExtension($reflectionProvider, [BookProvider::class]);
+
+        $classReflection = $reflectionProvider->getClass(BookProvider::class);
+
+        $this->assertFalse($sut->hasMethod($classReflection, 'customBookIsbn'));
+        $this->assertFalse($sut->hasProperty($classReflection, 'customBookIsbn'));
+    }
+}