diff --git a/composer.json b/composer.json
index d05aed2..7db6872 100644
--- a/composer.json
+++ b/composer.json
@@ -30,13 +30,13 @@
     "require-dev": {
         "doctrine/common": "^2.0 | ^3.0",
         "doctrine/doctrine-bundle": "^2.4",
-        "phpunit/phpunit": "^8.5.0",
+        "phpunit/phpunit": "^11.0",
         "symfony/browser-kit": "^7.0",
         "symfony/css-selector": "^7.0",
         "symfony/framework-bundle": "^7.0",
         "symfony/twig-bundle": "^7.0",
         "symfony/yaml": "^7.0",
-        "zenstruck/foundry": "^1.0"
+        "zenstruck/foundry": "^2.8"
     },
 
     "autoload": {
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 78146e5..b7d4106 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/8.5/phpunit.xsd"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.0/phpunit.xsd"
     colors="true">
 
     <php>
@@ -13,15 +13,11 @@
         <env name="APP_DEBUG" value="0"/>
     </php>
 
-    <!-- Filter for code coverage -->
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
+    <coverage>
+        <include>
             <directory suffix=".php">src/</directory>
-            <exclude>
-                <directory>vendor</directory>
-            </exclude>
-        </whitelist>
-    </filter>
+        </include>
+    </coverage>
 
     <testsuites>
         <testsuite name="App Test Suite">
diff --git a/src/DeleteRegistration/Type.php b/src/DeleteRegistration/Type.php
index 9fde0c9..b0495a6 100644
--- a/src/DeleteRegistration/Type.php
+++ b/src/DeleteRegistration/Type.php
@@ -17,7 +17,7 @@ public function __construct(UrlGeneratorInterface $urlGenerator)
         $this->urlGenerator = $urlGenerator;
     }
 
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         parent::buildForm($builder, $options);
 
@@ -31,7 +31,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
         );
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         parent::configureOptions($resolver);
 
diff --git a/src/EditRegistration/Type.php b/src/EditRegistration/Type.php
index 8b72054..3600b15 100644
--- a/src/EditRegistration/Type.php
+++ b/src/EditRegistration/Type.php
@@ -18,7 +18,7 @@ public function __construct(NewsletterRepositoryInterface $newsletterRepository)
         $this->newsletterRepository = $newsletterRepository;
     }
 
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $this->addNewslettersElementToForm($builder, false);
 
diff --git a/src/Entity/DetermineAppsSubclassHelper.php b/src/Entity/DetermineAppsSubclassHelper.php
index 1c8c660..0b4a84f 100644
--- a/src/Entity/DetermineAppsSubclassHelper.php
+++ b/src/Entity/DetermineAppsSubclassHelper.php
@@ -3,6 +3,7 @@
 namespace Webfactory\NewsletterRegistrationBundle\Entity;
 
 use Exception;
+use ReflectionClass;
 
 class DetermineAppsSubclassHelper
 {
@@ -12,6 +13,7 @@ public static function getAppsSubclassOf(string $parentClass, Exception $excepti
             if (
                 is_subclass_of($class, $parentClass)
                 && 0 !== strpos($class, 'Webfactory\NewsletterRegistrationBundle')
+                && is_file((string) (new ReflectionClass($class))->getFileName())
             ) {
                 return $class;
             }
diff --git a/src/StartRegistration/EmailAddressType.php b/src/StartRegistration/EmailAddressType.php
index 372eaed..b9fa969 100644
--- a/src/StartRegistration/EmailAddressType.php
+++ b/src/StartRegistration/EmailAddressType.php
@@ -50,7 +50,7 @@ public function __construct(
         $this->translator = $translator;
     }
 
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder->setDataMapper($this);
 
@@ -72,7 +72,7 @@ public function getParent(): string
         return TextType::class;
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'empty_data' => null,
diff --git a/src/StartRegistration/HoneypotType.php b/src/StartRegistration/HoneypotType.php
index f31565e..be27b58 100644
--- a/src/StartRegistration/HoneypotType.php
+++ b/src/StartRegistration/HoneypotType.php
@@ -80,7 +80,7 @@ public function getParent(): string
         return TextType::class;
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         parent::configureOptions($resolver);
         $resolver->setDefaults([
diff --git a/src/StartRegistration/Type.php b/src/StartRegistration/Type.php
index 455f9a5..04d612a 100644
--- a/src/StartRegistration/Type.php
+++ b/src/StartRegistration/Type.php
@@ -26,7 +26,7 @@ public function __construct(NewsletterRepositoryInterface $newsletterRepository,
         $this->pendingOptInFactory = $pendingOptInFactory;
     }
 
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder->add(static::ELEMENT_EMAIL_ADDRESS, EmailAddressType::class);
 
diff --git a/tests/Factory/BlockedEmailAddressHashFactory.php b/tests/Factory/BlockedEmailAddressHashFactory.php
index 66f2266..dcfb0a5 100644
--- a/tests/Factory/BlockedEmailAddressHashFactory.php
+++ b/tests/Factory/BlockedEmailAddressHashFactory.php
@@ -4,11 +4,11 @@
 
 use DateTimeImmutable;
 use Webfactory\NewsletterRegistrationBundle\Entity\BlockedEmailAddressHash;
-use Zenstruck\Foundry\ModelFactory;
+use Zenstruck\Foundry\Persistence\PersistentProxyObjectFactory;
 
-final class BlockedEmailAddressHashFactory extends ModelFactory
+final class BlockedEmailAddressHashFactory extends PersistentProxyObjectFactory
 {
-    protected function getDefaults(): array
+    protected function defaults(): array
     {
         return [
             'hash' => self::faker()->sha1(),
@@ -16,14 +16,14 @@ protected function getDefaults(): array
         ];
     }
 
-    protected function initialize(): self
+    protected function initialize(): static
     {
         return $this->instantiateWith(function (array $attributes): BlockedEmailAddressHash {
             return new BlockedEmailAddressHash($attributes['hash'], $attributes['blockDate']);
         });
     }
 
-    protected static function getClass(): string
+    public static function class(): string
     {
         return BlockedEmailAddressHash::class;
     }
diff --git a/tests/Factory/NewsletterFactory.php b/tests/Factory/NewsletterFactory.php
index 7bd1ef6..8f57c7c 100644
--- a/tests/Factory/NewsletterFactory.php
+++ b/tests/Factory/NewsletterFactory.php
@@ -3,11 +3,11 @@
 namespace Webfactory\NewsletterRegistrationBundle\Tests\Factory;
 
 use Webfactory\NewsletterRegistrationBundle\Tests\Entity\Dummy\Newsletter;
-use Zenstruck\Foundry\ModelFactory;
+use Zenstruck\Foundry\Persistence\PersistentProxyObjectFactory;
 
-final class NewsletterFactory extends ModelFactory
+final class NewsletterFactory extends PersistentProxyObjectFactory
 {
-    protected function getDefaults(): array
+    protected function defaults(): array
     {
         return [
             'name' => self::faker()->word(),
@@ -16,14 +16,14 @@ protected function getDefaults(): array
         ];
     }
 
-    protected function initialize(): self
+    protected function initialize(): static
     {
         return $this->instantiateWith(function (array $attributes): Newsletter {
             return new Newsletter(null, $attributes['name'], $attributes['rank'], $attributes['visible']);
         });
     }
 
-    protected static function getClass(): string
+    public static function class(): string
     {
         return Newsletter::class;
     }
diff --git a/tests/Factory/PendingOptInFactory.php b/tests/Factory/PendingOptInFactory.php
index c529f71..0d8e01f 100644
--- a/tests/Factory/PendingOptInFactory.php
+++ b/tests/Factory/PendingOptInFactory.php
@@ -5,11 +5,11 @@
 use DateTimeImmutable;
 use Webfactory\NewsletterRegistrationBundle\Entity\EmailAddress;
 use Webfactory\NewsletterRegistrationBundle\Tests\Entity\Dummy\PendingOptIn;
-use Zenstruck\Foundry\ModelFactory;
+use Zenstruck\Foundry\Persistence\PersistentProxyObjectFactory;
 
-final class PendingOptInFactory extends ModelFactory
+final class PendingOptInFactory extends PersistentProxyObjectFactory
 {
-    protected function getDefaults(): array
+    protected function defaults(): array
     {
         return [
             'uuid' => self::faker()->uuid(),
@@ -18,7 +18,7 @@ protected function getDefaults(): array
         ];
     }
 
-    protected function initialize(): self
+    protected function initialize(): static
     {
         return $this->instantiateWith(function (array $attributes): PendingOptIn {
             return new PendingOptIn(
@@ -30,7 +30,7 @@ protected function initialize(): self
         });
     }
 
-    protected static function getClass(): string
+    public static function class(): string
     {
         return PendingOptIn::class;
     }
diff --git a/tests/Factory/RecipientFactory.php b/tests/Factory/RecipientFactory.php
index 3b71f65..059d548 100644
--- a/tests/Factory/RecipientFactory.php
+++ b/tests/Factory/RecipientFactory.php
@@ -4,11 +4,11 @@
 
 use Webfactory\NewsletterRegistrationBundle\Entity\EmailAddress;
 use Webfactory\NewsletterRegistrationBundle\Tests\Entity\Dummy\Recipient;
-use Zenstruck\Foundry\ModelFactory;
+use Zenstruck\Foundry\Persistence\PersistentProxyObjectFactory;
 
-final class RecipientFactory extends ModelFactory
+final class RecipientFactory extends PersistentProxyObjectFactory
 {
-    protected function getDefaults(): array
+    protected function defaults(): array
     {
         return [
             'uuid' => self::faker()->uuid(),
@@ -16,14 +16,14 @@ protected function getDefaults(): array
         ];
     }
 
-    protected function initialize(): self
+    protected function initialize(): static
     {
         return $this->instantiateWith(function (array $attributes): Recipient {
             return new Recipient($attributes['uuid'], $attributes['emailAddress']);
         });
     }
 
-    protected static function getClass(): string
+    public static function class(): string
     {
         return Recipient::class;
     }