diff --git a/phpunit b/phpunit
index f4b80ed064..9975195309 100755
--- a/phpunit
+++ b/phpunit
@@ -1,7 +1,7 @@
 #!/usr/bin/env php
 <?php
 
-// Cache-Id: https://github.com/symfony/phpunit-bridge/commit/66ffffcd8a6bb23aec847c8bdfb918610399499a
+// Cache-Id: https://github.com/symfony/phpunit-bridge/commit/2155067dfc73e0e77dbc26f236af17e4df552de5
 
 if (!file_exists(__DIR__.'/vendor/symfony/phpunit-bridge/bin/simple-phpunit')) {
     echo "Unable to find the `simple-phpunit` script in `vendor/symfony/phpunit-bridge/bin/`.\nPlease run `composer update` before running this command.\n";
diff --git a/src/Symfony/Component/Debug/DebugClassLoader.php b/src/Symfony/Component/Debug/DebugClassLoader.php
index c9fa76cfe7..138b4d38d8 100644
--- a/src/Symfony/Component/Debug/DebugClassLoader.php
+++ b/src/Symfony/Component/Debug/DebugClassLoader.php
@@ -138,14 +138,14 @@ class DebugClassLoader
         try {
             if ($this->isFinder && !isset($this->loaded[$class])) {
                 $this->loaded[$class] = true;
-                if ($file = $this->classLoader[0]->findFile($class) ?: false) {
-                    $wasCached = \function_exists('opcache_is_script_cached') && @opcache_is_script_cached($file);
-
+                if (!$file = $this->classLoader[0]->findFile($class) ?: false) {
+                    // no-op
+                } elseif (\function_exists('opcache_is_script_cached') && @opcache_is_script_cached($file)) {
                     require $file;
 
-                    if ($wasCached) {
-                        return;
-                    }
+                    return;
+                } else {
+                    require $file;
                 }
             } else {
                 \call_user_func($this->classLoader, $class);