diff --git a/phpunit b/phpunit
index 9141d249d2695..619ba4674a594 100755
--- a/phpunit
+++ b/phpunit
@@ -16,9 +16,6 @@ if (!getenv('SYMFONY_PHPUNIT_VERSION')) {
         putenv('SYMFONY_PHPUNIT_VERSION=9.5');
     }
 }
-if (!getenv('SYMFONY_PATCH_TYPE_DECLARATIONS')) {
-    putenv('SYMFONY_PATCH_TYPE_DECLARATIONS=deprecations=1');
-}
 if (getcwd() === realpath(__DIR__.'/src/Symfony/Bridge/PhpUnit')) {
     putenv('SYMFONY_DEPRECATIONS_HELPER=disabled');
 }
diff --git a/src/Symfony/Component/ErrorHandler/DebugClassLoader.php b/src/Symfony/Component/ErrorHandler/DebugClassLoader.php
index c9587b482c3e1..e5e6bb7a5b7e8 100644
--- a/src/Symfony/Component/ErrorHandler/DebugClassLoader.php
+++ b/src/Symfony/Component/ErrorHandler/DebugClassLoader.php
@@ -535,7 +535,7 @@ public function checkAnnotations(\ReflectionClass $refl, string $class): array
             if (null !== (self::INTERNAL_TYPES[$use] ?? null)) {
                 foreach (self::INTERNAL_TYPES[$use] as $method => $returnType) {
                     if ('void' !== $returnType) {
-                        self::$returnTypes[$class] += [$method => [$returnType, $returnType, $class, '']];
+                        self::$returnTypes[$class] += [$method => [$returnType, $returnType, $use, '']];
                     }
                 }
             }
@@ -612,7 +612,7 @@ public function checkAnnotations(\ReflectionClass $refl, string $class): array
                     $this->patchMethod($method, $returnType, $declaringFile, $normalizedType);
                 }
 
-                if (strncmp($ns, $declaringClass, $len)) {
+                if (false === strpos($doc, '@deprecated') && strncmp($ns, $declaringClass, $len)) {
                     if ($canAddReturnType && 'docblock' === $this->patchTypes['force'] && false === strpos($method->getFileName(), \DIRECTORY_SEPARATOR.'vendor'.\DIRECTORY_SEPARATOR)) {
                         $this->patchMethod($method, $returnType, $declaringFile, $normalizedType);
                     } elseif ('' !== $declaringClass && $this->patchTypes['deprecations']) {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php
index 17984b86d9cc3..b1e7993de70ae 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php
@@ -320,12 +320,12 @@ public function getSalt()
         return null;
     }
 
-    public function serialize()
+    public function serialize(): string
     {
         return serialize($this->name);
     }
 
-    public function unserialize($serialized)
+    public function unserialize($serialized): void
     {
         $this->name = unserialize($serialized);
     }