diff --git a/src/Symfony/Bundle/SecurityBundle/Debug/WrappedListener.php b/src/Symfony/Bundle/SecurityBundle/Debug/WrappedListener.php
index 7f92164976..ba00249902 100644
--- a/src/Symfony/Bundle/SecurityBundle/Debug/WrappedListener.php
+++ b/src/Symfony/Bundle/SecurityBundle/Debug/WrappedListener.php
@@ -12,6 +12,7 @@
 namespace Symfony\Bundle\SecurityBundle\Debug;
 
 use Symfony\Component\HttpKernel\Event\RequestEvent;
+use Symfony\Component\Security\Http\Firewall\AbstractListener;
 use Symfony\Component\Security\Http\Firewall\ListenerInterface;
 
 /**
diff --git a/src/Symfony/Component/Cache/Simple/TraceableCache.php b/src/Symfony/Component/Cache/Simple/TraceableCache.php
index eac77badd4..2214f1c818 100644
--- a/src/Symfony/Component/Cache/Simple/TraceableCache.php
+++ b/src/Symfony/Component/Cache/Simple/TraceableCache.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Cache\Simple;
 
 use Psr\SimpleCache\CacheInterface as Psr16CacheInterface;
+use Symfony\Component\Cache\Adapter\TraceableAdapter;
 use Symfony\Component\Cache\PruneableInterface;
 use Symfony\Component\Cache\ResettableInterface;
 use Symfony\Contracts\Cache\CacheInterface;
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/SessionHandlerFactory.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/SessionHandlerFactory.php
index 1f017c8afd..b92bd0ffde 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/SessionHandlerFactory.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/SessionHandlerFactory.php
@@ -54,7 +54,7 @@ class SessionHandlerFactory
             case 0 === strpos($connection, 'rediss:'):
             case 0 === strpos($connection, 'memcached:'):
                 if (!class_exists(AbstractAdapter::class)) {
-                    throw new InvalidArgumentException(sprintf('Unsupported DSN "%s". Try running "composer require symfony/cache".', $connection));
+                    throw new \InvalidArgumentException(sprintf('Unsupported DSN "%s". Try running "composer require symfony/cache".', $connection));
                 }
                 $handlerClass = 0 === strpos($connection, 'memcached:') ? MemcachedSessionHandler::class : RedisSessionHandler::class;
                 $connection = AbstractAdapter::createConnection($connection, ['lazy' => true]);
diff --git a/src/Symfony/Component/Mime/Test/Constraint/EmailAttachmentCount.php b/src/Symfony/Component/Mime/Test/Constraint/EmailAttachmentCount.php
index b219f28b9d..c0adbe3a0c 100644
--- a/src/Symfony/Component/Mime/Test/Constraint/EmailAttachmentCount.php
+++ b/src/Symfony/Component/Mime/Test/Constraint/EmailAttachmentCount.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Mime\Test\Constraint;
 
 use PHPUnit\Framework\Constraint\Constraint;
+use Symfony\Component\Mime\Message;
 use Symfony\Component\Mime\RawMessage;
 
 final class EmailAttachmentCount extends Constraint
diff --git a/src/Symfony/Component/Mime/Test/Constraint/EmailHtmlBodyContains.php b/src/Symfony/Component/Mime/Test/Constraint/EmailHtmlBodyContains.php
index 8965195144..3c61376e1a 100644
--- a/src/Symfony/Component/Mime/Test/Constraint/EmailHtmlBodyContains.php
+++ b/src/Symfony/Component/Mime/Test/Constraint/EmailHtmlBodyContains.php
@@ -12,6 +12,8 @@
 namespace Symfony\Component\Mime\Test\Constraint;
 
 use PHPUnit\Framework\Constraint\Constraint;
+use Symfony\Component\Mime\Message;
+use Symfony\Component\Mime\RawMessage;
 
 final class EmailHtmlBodyContains extends Constraint
 {
diff --git a/src/Symfony/Component/Mime/Test/Constraint/EmailTextBodyContains.php b/src/Symfony/Component/Mime/Test/Constraint/EmailTextBodyContains.php
index b5e87f96f5..063d96306b 100644
--- a/src/Symfony/Component/Mime/Test/Constraint/EmailTextBodyContains.php
+++ b/src/Symfony/Component/Mime/Test/Constraint/EmailTextBodyContains.php
@@ -12,6 +12,8 @@
 namespace Symfony\Component\Mime\Test\Constraint;
 
 use PHPUnit\Framework\Constraint\Constraint;
+use Symfony\Component\Mime\Message;
+use Symfony\Component\Mime\RawMessage;
 
 final class EmailTextBodyContains extends Constraint
 {
diff --git a/src/Symfony/Component/Security/Core/User/LdapUserProvider.php b/src/Symfony/Component/Security/Core/User/LdapUserProvider.php
index 406d141c47..1770551fc9 100644
--- a/src/Symfony/Component/Security/Core/User/LdapUserProvider.php
+++ b/src/Symfony/Component/Security/Core/User/LdapUserProvider.php
@@ -11,12 +11,12 @@
 
 namespace Symfony\Component\Security\Core\User;
 
-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', LdapUserProvider::class, BaseLdapUserProvider::class), E_USER_DEPRECATED);
-
 use Symfony\Component\Ldap\Entry;
 use Symfony\Component\Ldap\Security\LdapUserProvider as BaseLdapUserProvider;
 use Symfony\Component\Security\Core\Exception\UnsupportedUserException;
 
+@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', LdapUserProvider::class, BaseLdapUserProvider::class), E_USER_DEPRECATED);
+
 /**
  * LdapUserProvider is a simple user provider on top of ldap.
  *
diff --git a/src/Symfony/Component/Security/Http/Firewall.php b/src/Symfony/Component/Security/Http/Firewall.php
index ee769496a6..133c4486b9 100644
--- a/src/Symfony/Component/Security/Http/Firewall.php
+++ b/src/Symfony/Component/Security/Http/Firewall.php
@@ -17,6 +17,7 @@ use Symfony\Component\HttpKernel\Event\FinishRequestEvent;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\HttpKernel\Event\RequestEvent;
 use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\Security\Http\Firewall\AbstractListener;
 use Symfony\Component\Security\Http\Firewall\AccessListener;
 use Symfony\Component\Security\Http\Firewall\LogoutListener;