diff --git a/tests/Functional/Apps/DefaultApp/src/Entity/Bill.php b/tests/Functional/Apps/DefaultApp/src/Entity/Bill.php
index 5da401c682..1155a5cd0d 100644
--- a/tests/Functional/Apps/DefaultApp/src/Entity/Bill.php
+++ b/tests/Functional/Apps/DefaultApp/src/Entity/Bill.php
@@ -13,13 +13,13 @@ class Bill
     #[ORM\Id]
     #[ORM\GeneratedValue]
     #[ORM\Column(type: 'integer')]
-    private $id;
+    private ?int $id = null;
 
     #[ORM\Column(type: 'string', length: 255)]
-    private $name;
+    private ?string $name = null;
 
     #[ORM\ManyToMany(targetEntity: Customer::class, inversedBy: 'bills')]
-    private $customers;
+    private Collection $customers;
 
     public function __construct()
     {
diff --git a/tests/Functional/Apps/DefaultApp/src/Entity/BlogPost.php b/tests/Functional/Apps/DefaultApp/src/Entity/BlogPost.php
index 5e30d23b5d..25735810c9 100644
--- a/tests/Functional/Apps/DefaultApp/src/Entity/BlogPost.php
+++ b/tests/Functional/Apps/DefaultApp/src/Entity/BlogPost.php
@@ -12,29 +12,29 @@ class BlogPost
     #[ORM\Id]
     #[ORM\GeneratedValue]
     #[ORM\Column(type: 'integer')]
-    private $id;
+    private ?int $id = null;
 
     #[ORM\Column(type: 'string', length: 255)]
-    private $title;
+    private ?string $title = null;
 
     #[ORM\Column(type: 'string', length: 255)]
-    private $slug;
+    private ?string $slug = null;
 
     #[ORM\Column(type: 'text')]
-    private $content;
+    private ?string $content = null;
 
     #[ORM\ManyToMany(targetEntity: Category::class, inversedBy: 'blogPosts')]
-    private $categories;
+    private Collection $categories;
 
     #[ORM\Column(type: 'datetime_immutable')]
-    private $createdAt;
+    private ?\DateTimeInterface $createdAt = null;
 
     #[ORM\Column(type: 'datetime_immutable', nullable: true)]
-    private $publishedAt;
+    private ?\DateTimeImmutable $publishedAt = null;
 
     #[ORM\ManyToOne(targetEntity: User::class, inversedBy: 'blogPosts')]
     #[ORM\JoinColumn(nullable: false)]
-    private $author;
+    private ?User $author = null;
 
     #[ORM\ManyToOne(targetEntity: User::class)]
     private $publisher;
diff --git a/tests/Functional/Apps/DefaultApp/src/Entity/Category.php b/tests/Functional/Apps/DefaultApp/src/Entity/Category.php
index cccc8bf428..f87142805c 100644
--- a/tests/Functional/Apps/DefaultApp/src/Entity/Category.php
+++ b/tests/Functional/Apps/DefaultApp/src/Entity/Category.php
@@ -13,17 +13,17 @@ class Category
     #[ORM\Id]
     #[ORM\GeneratedValue]
     #[ORM\Column(type: 'integer')]
-    private $id;
+    private ?int $id = null;
 
     #[Assert\NotBlank]
     #[ORM\Column(type: 'string', length: 255)]
-    private $name;
+    private ?string $name = null;
 
     #[ORM\Column(type: 'string', length: 255)]
-    private $slug;
+    private ?string $slug = null;
 
     #[ORM\ManyToMany(targetEntity: BlogPost::class, mappedBy: 'categories')]
-    private $blogPosts;
+    private Collection $blogPosts;
 
     #[ORM\Column(type: 'boolean')]
     private bool $active = false;
diff --git a/tests/Functional/Apps/DefaultApp/src/Entity/Customer.php b/tests/Functional/Apps/DefaultApp/src/Entity/Customer.php
index 098cb8fd1f..b4147eb2c3 100644
--- a/tests/Functional/Apps/DefaultApp/src/Entity/Customer.php
+++ b/tests/Functional/Apps/DefaultApp/src/Entity/Customer.php
@@ -13,13 +13,13 @@ class Customer
     #[ORM\Id]
     #[ORM\GeneratedValue]
     #[ORM\Column(type: 'integer')]
-    private $id;
+    private ?int $id = null;
 
     #[ORM\Column(type: 'string', length: 255)]
-    private $name;
+    private ?string $name = null;
 
     #[ORM\ManyToMany(targetEntity: Bill::class, mappedBy: 'customers')]
-    private $bills;
+    private Collection $bills;
 
     public function __construct()
     {
diff --git a/tests/Functional/Apps/DefaultApp/src/Entity/Page.php b/tests/Functional/Apps/DefaultApp/src/Entity/Page.php
index 0e690bee46..952cba828e 100644
--- a/tests/Functional/Apps/DefaultApp/src/Entity/Page.php
+++ b/tests/Functional/Apps/DefaultApp/src/Entity/Page.php
@@ -11,10 +11,10 @@ class Page
     #[ORM\Id]
     #[ORM\GeneratedValue]
     #[ORM\Column(type: 'integer')]
-    private $id;
+    private ?int $id = null;
 
     #[ORM\Column(type: 'string', length: 255)]
-    private $name;
+    private ?string $name = null;
 
     #[ORM\ManyToOne(targetEntity: Website::class, inversedBy: 'pages')]
     #[ORM\JoinColumn(nullable: false)]
@@ -42,7 +42,7 @@ public function getWebsite()
         return $this->website;
     }
 
-    public function setWebsite(?Website $website)
+    public function setWebsite(?Website $website): static
     {
         $this->website = $website;
 
diff --git a/tests/Functional/Apps/DefaultApp/src/Entity/User.php b/tests/Functional/Apps/DefaultApp/src/Entity/User.php
index 4627cc08ba..f8b3587f1e 100644
--- a/tests/Functional/Apps/DefaultApp/src/Entity/User.php
+++ b/tests/Functional/Apps/DefaultApp/src/Entity/User.php
@@ -13,16 +13,16 @@ class User implements \Stringable
     #[ORM\Id]
     #[ORM\GeneratedValue]
     #[ORM\Column(type: 'integer')]
-    private $id;
+    private ?int $id = null;
 
     #[ORM\Column(type: 'string', length: 255)]
-    private $name;
+    private ?string $name = null;
 
     #[ORM\Column(type: 'string', length: 255)]
-    private $email;
+    private ?string $email = null;
 
     #[ORM\OneToMany(targetEntity: BlogPost::class, mappedBy: 'author', orphanRemoval: true)]
-    private $blogPosts;
+    private Collection $blogPosts;
 
     public function __construct()
     {
diff --git a/tests/Functional/Apps/DefaultApp/src/Entity/Website.php b/tests/Functional/Apps/DefaultApp/src/Entity/Website.php
index 0054431cc0..f8f7f88ad6 100644
--- a/tests/Functional/Apps/DefaultApp/src/Entity/Website.php
+++ b/tests/Functional/Apps/DefaultApp/src/Entity/Website.php
@@ -13,13 +13,13 @@ class Website implements \Stringable
     #[ORM\Id]
     #[ORM\GeneratedValue]
     #[ORM\Column(type: 'integer')]
-    private $id;
+    private ?int $id = null;
 
     #[ORM\Column(type: 'string', length: 255)]
-    private $name;
+    private ?string $name = null;
 
     #[ORM\OneToMany(targetEntity: Page::class, mappedBy: 'website', orphanRemoval: true)]
-    private $pages;
+    private Collection $pages;
 
     public function __construct()
     {