diff -u b/core/lib/Drupal/Core/Render/Element/RenderElement.php b/core/lib/Drupal/Core/Render/Element/RenderElement.php
--- b/core/lib/Drupal/Core/Render/Element/RenderElement.php
+++ b/core/lib/Drupal/Core/Render/Element/RenderElement.php
@@ -197,13 +197,17 @@
       elseif (!empty($element['#group_details'])) {
         // Intentionally empty to clarify the flow; we simply return $element.
       }
-      // Otherwise, this element belongs to a group and the group exists, so we do
-      // not render it.
+      // Otherwise, this element belongs to a group and the group exists, so we
+      // do not render it.
       elseif (Element::children($element['#groups'][$group])) {
         $element['#printed'] = TRUE;
       }
     }
-    $element['#attributes']['class'][] = 'error';
+
+    // Set attributes to indicate that there is a child with an error.
+    if (!empty($element['#children_errors'])) {
+      $element['#attributes']['class'][] = 'error';
+    }
 
     return $element;
   }