diff --git a/src/Composer/Util/ErrorHandler.php b/src/Composer/Util/ErrorHandler.php
index cbe42f4b8..8e96191f2 100644
--- a/src/Composer/Util/ErrorHandler.php
+++ b/src/Composer/Util/ErrorHandler.php
@@ -53,10 +53,14 @@ class ErrorHandler
         }
 
         if (self::$io) {
-            // ignore symfony/* deprecation warnings about return types
+            // ignore symfony/* deprecation warnings
+            // TODO remove in 2.3
             if (preg_match('{^Return type of Symfony\\\\.*ReturnTypeWillChange}is', $message)) {
                 return true;
             }
+            if (strpos(strtr($file, '\\', '/'), 'vendor/symfony/') !== false) {
+                return true;
+            }
 
             self::$io->writeError('<warning>Deprecation Notice: '.$message.' in '.$file.':'.$line.'</warning>');
             if (self::$io->isVerbose()) {