diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/PolyfillAssertTrait.php b/src/Symfony/Bridge/PhpUnit/Legacy/PolyfillAssertTrait.php
index 85cbe17b71..5d564774a7 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/PolyfillAssertTrait.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/PolyfillAssertTrait.php
@@ -17,7 +17,7 @@ use PHPUnit\Framework\Constraint\StringContains;
 use PHPUnit\Framework\Constraint\TraversableContains;
 
 /**
- * @internal
+ * This trait is @internal
  */
 trait PolyfillAssertTrait
 {
diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/PolyfillTestCaseTrait.php b/src/Symfony/Bridge/PhpUnit/Legacy/PolyfillTestCaseTrait.php
index 071a719488..69609c5ea4 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/PolyfillTestCaseTrait.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/PolyfillTestCaseTrait.php
@@ -15,7 +15,7 @@ use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
 
 /**
- * @internal
+ * This trait is @internal
  */
 trait PolyfillTestCaseTrait
 {
diff --git a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php
index 50c805228b..dc3e83b776 100644
--- a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php
+++ b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php
@@ -156,12 +156,6 @@ if (!file_exists("$PHPUNIT_DIR/$PHPUNIT_VERSION_DIR/phpunit") || $configurationH
     $alteredCode = preg_replace('/abstract class (?:Assert|PHPUnit_Framework_Assert)[^\{]+\{/', '$0 '.PHP_EOL."    use \Symfony\Bridge\PhpUnit\Legacy\PolyfillAssertTrait;", $alteredCode, 1);
     file_put_contents($alteredFile, $alteredCode);
 
-    // remove internal annotation from polyfill
-    foreach (array('PolyfillTestCaseTrait', 'PolyfillAssertTrait') as $polyfill) {
-        $traitFile = "./vendor/symfony/phpunit-bridge/Legacy/$polyfill.php";
-        file_put_contents($traitFile, str_replace(' * @internal', '', file_get_contents($traitFile)));
-    }
-
     file_put_contents('phpunit', <<<'EOPHP'
 <?php