diff --git a/core/lib/Drupal/Core/Extension/Discovery/RecursiveExtensionFilterIterator.php b/core/lib/Drupal/Core/Extension/Discovery/RecursiveExtensionFilterIterator.php
index d5da27c..551f73c 100644
--- a/core/lib/Drupal/Core/Extension/Discovery/RecursiveExtensionFilterIterator.php
+++ b/core/lib/Drupal/Core/Extension/Discovery/RecursiveExtensionFilterIterator.php
@@ -65,11 +65,13 @@ class RecursiveExtensionFilterIterator extends \RecursiveFilterIterator {
     'vendor',
     // Front-end.
     'assets',
+    'bower_components',
     'css',
     'files',
     'images',
     'js',
     'misc',
+    'node_modules',
     'templates',
     // Legacy subdirectories.
     'includes',