diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php
index e260fb8dd685..a7bfd80ede67 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php
@@ -47,7 +47,7 @@ public function __construct(array $mockedNamespaces = array())
     {
         if (class_exists('PHPUnit_Util_Blacklist')) {
             \PHPUnit_Util_Blacklist::$blacklistedClassNames[__CLASS__] = 2;
-        } elseif (method_exists(Blacklist::class, 'addDirectory')) {
+        } elseif (method_exists('PHPUnit\Util\Blacklist', 'addDirectory')) {
             (new BlackList())->getBlacklistedDirectories();
             Blacklist::addDirectory(\dirname((new \ReflectionClass(__CLASS__))->getFileName(), 2));
         } else {
diff --git a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit
index 92d4d6994af9..f37967ff0cf1 100755
--- a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit
+++ b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit
@@ -130,8 +130,8 @@ if (class_exists('PHPUnit_Util_Blacklist')) {
     PHPUnit_Util_Blacklist::$blacklistedClassNames['SymfonyBlacklistSimplePhpunit'] = 1;
 } elseif (method_exists('PHPUnit\Util\Blacklist', 'addDirectory')) {
     (new PHPUnit\Util\BlackList())->getBlacklistedDirectories();
-    PHPUnit\Util\Blacklist::addDirectory(\dirname((new \ReflectionClass('SymfonyBlacklistPhpunit'))->getFileName()));
-    PHPUnit\Util\Blacklist::addDirectory(\dirname((new \ReflectionClass('SymfonyBlacklistSimplePhpunit'))->getFileName()));
+    PHPUnit\Util\Blacklist::addDirectory(dirname((new ReflectionClass('SymfonyBlacklistPhpunit'))->getFileName()));
+    PHPUnit\Util\Blacklist::addDirectory(dirname((new ReflectionClass('SymfonyBlacklistSimplePhpunit'))->getFileName()));
 } else {
     PHPUnit\Util\Blacklist::$blacklistedClassNames['SymfonyBlacklistPhpunit'] = 1;
     PHPUnit\Util\Blacklist::$blacklistedClassNames['SymfonyBlacklistSimplePhpunit'] = 1;