diff --git a/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
index 3b0d926c2e..53b2cee448 100644
--- a/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
@@ -12,7 +12,7 @@
 namespace Symfony\Component\Form\Tests\Resources;
 
 use PHPUnit\Framework\TestCase;
-use PHPUnit\Util\Xml\Loader;
+use Symfony\Component\Translation\Util\XliffUtils;
 
 class TranslationFilesTest extends TestCase
 {
@@ -21,13 +21,12 @@ class TranslationFilesTest extends TestCase
      */
     public function testTranslationFileIsValid($filePath)
     {
-        $loader = class_exists(Loader::class)
-            ? [new Loader(), 'loadFile']
-            : ['PHPUnit\Util\XML', 'loadfile'];
+        $document = new \DOMDocument();
+        $document->loadXML(file_get_contents($filePath));
 
-        $loader($filePath, false, false, true);
+        $errors = XliffUtils::validateSchema($document);
 
-        $this->addToAssertionCount(1);
+        $this->assertCount(0, $errors, sprintf('"%s" is invalid:%s', $filePath, \PHP_EOL.implode(\PHP_EOL, array_column($errors, 'message'))));
     }
 
     public function provideTranslationFiles()
diff --git a/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
index c45b5a0d36..2402b01998 100644
--- a/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
@@ -12,7 +12,7 @@
 namespace Symfony\Component\Security\Core\Tests\Resources;
 
 use PHPUnit\Framework\TestCase;
-use PHPUnit\Util\Xml\Loader;
+use Symfony\Component\Translation\Util\XliffUtils;
 
 class TranslationFilesTest extends TestCase
 {
@@ -21,13 +21,12 @@ class TranslationFilesTest extends TestCase
      */
     public function testTranslationFileIsValid($filePath)
     {
-        $loader = class_exists(Loader::class)
-            ? [new Loader(), 'loadFile']
-            : ['PHPUnit\Util\XML', 'loadfile'];
+        $document = new \DOMDocument();
+        $document->loadXML(file_get_contents($filePath));
 
-        $loader($filePath, false, false, true);
+        $errors = XliffUtils::validateSchema($document);
 
-        $this->addToAssertionCount(1);
+        $this->assertCount(0, $errors, sprintf('"%s" is invalid:%s', $filePath, \PHP_EOL.implode(\PHP_EOL, array_column($errors, 'message'))));
     }
 
     public function provideTranslationFiles()
diff --git a/src/Symfony/Component/Security/Core/composer.json b/src/Symfony/Component/Security/Core/composer.json
index e1bc4c2143..c99f3a1d41 100644
--- a/src/Symfony/Component/Security/Core/composer.json
+++ b/src/Symfony/Component/Security/Core/composer.json
@@ -26,6 +26,7 @@
         "symfony/expression-language": "^3.4|^4.0|^5.0",
         "symfony/http-foundation": "^3.4|^4.0|^5.0",
         "symfony/ldap": "^4.4|^5.0",
+        "symfony/translation": "^4.4|^5.0",
         "symfony/validator": "^3.4.31|^4.3.4|^5.0",
         "psr/log": "~1.0"
     },
diff --git a/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
index 9779f43727..894ae55f10 100644
--- a/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
@@ -12,7 +12,7 @@
 namespace Symfony\Component\Validator\Tests\Resources;
 
 use PHPUnit\Framework\TestCase;
-use PHPUnit\Util\Xml\Loader;
+use Symfony\Component\Translation\Util\XliffUtils;
 
 class TranslationFilesTest extends TestCase
 {
@@ -21,13 +21,12 @@ class TranslationFilesTest extends TestCase
      */
     public function testTranslationFileIsValid($filePath)
     {
-        $loader = class_exists(Loader::class)
-            ? [new Loader(), 'loadFile']
-            : ['PHPUnit\Util\XML', 'loadfile'];
+        $document = new \DOMDocument();
+        $document->loadXML(file_get_contents($filePath));
 
-        $loader($filePath, false, false, true);
+        $errors = XliffUtils::validateSchema($document);
 
-        $this->addToAssertionCount(1);
+        $this->assertCount(0, $errors, sprintf('"%s" is invalid:%s', $filePath, \PHP_EOL.implode(\PHP_EOL, array_column($errors, 'message'))));
     }
 
     public function provideTranslationFiles()