diff --git a/core/includes/form.inc b/core/includes/form.inc
index a9fe61a2ebe98616c69121661788cd4f018277aa..bf64d8166c96037718a141aff11da2bd9aed10f6 100644
--- a/core/includes/form.inc
+++ b/core/includes/form.inc
@@ -1944,15 +1944,6 @@ function _form_builder_handle_input_element($form_id, &$element, &$form_state) {
     }
   }
 
-  // The 'required' attribute should only be printed when #required is true.
-  // The presence of a boolean attribute on an element represents the true
-  // value, and the absence of the attribute represents the false value.
-  // http://www.w3.org/TR/html5/common-microsyntaxes.html#boolean-attribute.
-  if (!empty($element['#required'])) {
-    $element['#attributes']['required'] = 'required';
-    $element['#attributes']['aria-required'] = 'true';
-  }
-
   // With JavaScript or other easy hacking, input can be submitted even for
   // elements with #access=FALSE or #disabled=TRUE. For security, these must
   // not be processed. Forms that set #disabled=TRUE on an element do not
diff --git a/core/modules/simpletest/tests/form.test b/core/modules/simpletest/tests/form.test
index c2185e8600a0e38ba2d077c0f3cbb6f119a56491..94dfa8749e16f0a5fa510f3292fde0965035bd2c 100644
--- a/core/modules/simpletest/tests/form.test
+++ b/core/modules/simpletest/tests/form.test
@@ -366,29 +366,6 @@ class FormsTestCase extends DrupalWebTestCase {
     $this->drupalPost(NULL, array('checkboxes[one]' => TRUE, 'checkboxes[two]' => TRUE), t('Submit'));
     $this->assertText('An illegal choice has been detected.', t('Input forgery was detected.'));
   }
-
-  /**
-   * Tests required attribute.
-   */
-  function testRequiredAttribute() {
-    $this->drupalGet('form-test/required-attribute');
-    $expected = 'required';
-    // Test to make sure the elements have the proper required attribute.
-    foreach (array('textfield', 'password') as $type) {
-      $element = $this->xpath('//input[@id=:id and @required=:expected]', array(
-        ':id' => 'edit-' . $type,
-        ':expected' => $expected,
-      ));
-      $this->assertTrue(!empty($element), t('The @type has the proper required attribute.', array('@type' => $type)));
-    }
-
-    // Test to make sure textarea has the proper required attribute.
-    $element = $this->xpath('//textarea[@id=:id and @required=:expected]', array(
-      ':id' => 'edit-textarea',
-      ':expected' => $expected,
-    ));
-    $this->assertTrue(!empty($element), t('Placeholder text placed in textarea.'));
-  }
 }
 
 /**
diff --git a/core/modules/simpletest/tests/form_test.module b/core/modules/simpletest/tests/form_test.module
index ed52b8fd4bda4ac72cb011f1d0bffa73c286f571..5e3fb173ed9b28aae53c47fd315e7a7f2440b564 100644
--- a/core/modules/simpletest/tests/form_test.module
+++ b/core/modules/simpletest/tests/form_test.module
@@ -210,13 +210,6 @@ function form_test_menu() {
     'type' => MENU_CALLBACK,
   );
 
-  $items['form-test/required-attribute'] = array(
-    'title' => 'Required',
-    'page callback' => 'drupal_get_form',
-    'page arguments' => array('form_test_required_attribute'),
-    'access callback' => TRUE,
-  );
-
   return $items;
 }
 
@@ -1690,18 +1683,3 @@ function form_test_checkboxes_zero($form, &$form_state, $json = TRUE) {
 function _form_test_checkboxes_zero_no_redirect($form, &$form_state) {
   $form_state['redirect'] = FALSE;
 }
-
-/**
- * Builds a form to test the placeholder attribute.
- */
-function form_test_required_attribute($form, &$form_state) {
-  foreach (array('textfield', 'textarea', 'password') as $type) {
-    $form[$type] = array(
-      '#type' => $type,
-      '#required' => TRUE,
-      '#title' => $type,
-    );
-  }
-
-  return $form;
-}