diff -u b/core/modules/system/lib/Drupal/system/Tests/Common/AttributesUnitTest.php b/core/modules/system/lib/Drupal/system/Tests/Common/AttributesUnitTest.php
--- b/core/modules/system/lib/Drupal/system/Tests/Common/AttributesUnitTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Common/AttributesUnitTest.php
@@ -48,8 +48,7 @@
     // Verify empty attributes array is rendered.
     $this->assertIdentical((string) new Attribute(array()), '', 'Empty attributes array.');
 
-    $attributes = array('key1' => 'value1');
-    $attribute = new Attribute($attributes);
+    $attribute = new Attribute(array('key1' => 'value1'));
     foreach($attribute as $value) {
       $this->assertIdentical((string) $value, 'value1', 'Iterate over attribute.');
     }
reverted:
--- b/core/modules/views/views.theme.inc
+++ a/core/modules/views/views.theme.inc
@@ -654,7 +654,7 @@
   $vars['attributes']['class'][] = 'cols-' . count($vars['header']);
 
   if (!empty($handler->options['summary'])) {
+    $vars['attributes_array'] = array('summary' => $handler->options['summary']);
-    $vars['attributes'] = array('summary' => $handler->options['summary']);
   }
   // If the table has headers and it should react responsively to columns hidden
   // with the classes represented by the constants RESPONSIVE_PRIORITY_MEDIUM
@@ -777,7 +777,7 @@
   }
   $vars['rows'] = $rows;
   if (!empty($handler->options['summary'])) {
+    $vars['attributes_array'] = array('summary' => $handler->options['summary']);
-    $vars['attributes'] = array('summary' => $handler->options['summary']);
   }
   // If the table has headers and it should react responsively to columns hidden
   // with the classes represented by the constants RESPONSIVE_PRIORITY_MEDIUM
reverted:
--- b/core/modules/views_ui/views_ui.theme.inc
+++ a/core/modules/views_ui/views_ui.theme.inc
@@ -29,7 +29,7 @@
   }
   if (!empty($variables['overridden'])) {
     $variables['attributes']['class'][] = 'overridden';
+    $variables['attributes_array']['title'][] = t('Overridden');
-    $variables['attributes']['title'] = t('Overridden');
   }
 
   // Append a colon to the description, if requested.
@@ -46,7 +46,7 @@
   }
   if (!empty($element['#overridden'])) {
     $variables['attributes']['class'][] = 'overridden';
+    $variables['attributes_array']['title'][] = t('Overridden');
-    $variables['attributes']['title'] = t('Overridden');
   }
 
   $variables['content'] = $element['#children'];