diff --git a/core/modules/field_ui/src/Tests/FieldUiTestBase.php b/core/modules/field_ui/src/Tests/FieldUiTestBase.php
index 3041bcc..71f8481 100644
--- a/core/modules/field_ui/src/Tests/FieldUiTestBase.php
+++ b/core/modules/field_ui/src/Tests/FieldUiTestBase.php
@@ -78,6 +78,7 @@ function fieldUIAddNewField($bundle_path, $initial_edit, $field_edit = array(),
 
     // Second step : 'Field settings' form.
     $this->drupalPostForm(NULL, $field_edit, t('Save field settings'));
+    $this->assertNoRaw('<', 'The page does not have double escaped HTML tags.');
     $this->assertRaw(t('Updated field %label field settings.', array('%label' => $label)), 'Redirected to instance and widget settings page.');
 
     // Third step : 'Instance settings' form.
@@ -105,6 +106,7 @@ function fieldUIAddExistingField($bundle_path, $initial_edit, $instance_edit = a
 
     // First step : 'Re-use existing field' on the 'Manage fields' page.
     $this->drupalPostForm("$bundle_path/fields", $initial_edit, t('Save'));
+    $this->assertNoRaw('<', 'The page does not have double escaped HTML tags.');
 
     // Second step : 'Instance settings' form.
     $this->drupalPostForm(NULL, $instance_edit, t('Save settings'));
diff --git a/core/modules/field_ui/src/Tests/ManageFieldsTest.php b/core/modules/field_ui/src/Tests/ManageFieldsTest.php
index 207626c..5e2b333 100644
--- a/core/modules/field_ui/src/Tests/ManageFieldsTest.php
+++ b/core/modules/field_ui/src/Tests/ManageFieldsTest.php
@@ -141,6 +141,7 @@ function updateField() {
 
     // Go to the field instance edit page.
     $this->drupalGet('admin/structure/types/manage/' . $this->type . '/fields/' . $instance_id);
+    $this->assertNoRaw('<', 'The page does not have double escaped HTML tags.');
     $edit = array(
       'instance[settings][test_instance_setting]' => $string,
     );
@@ -220,6 +221,7 @@ protected function deleteFieldInstance() {
     // Delete the field instance.
     $instance_id = 'node.' . $this->type . '.' . $this->field_name;
     $this->drupalGet('admin/structure/types/manage/' . $this->type . '/fields/' . $instance_id);
+    $this->assertNoRaw('<', 'The page does not have double escaped HTML tags.');
     $this->drupalPostForm(NULL, array(), t('Delete field'));
     $this->assertResponse(200);
   }
@@ -563,6 +565,9 @@ function testHelpDescriptions() {
 
     entity_get_form_display('node', 'article', 'default')->setComponent('field_image')->save();
 
+    $this->drupalGet('admin/structure/types/manage/article/fields/node.article.field_image');
+    $this->assertNoRaw('<div', 'Image fields do not have double escaped HTML tags.');
+
     $edit = array(
       'instance[description]' => '<strong>Test with an upload field.',
     );
diff --git a/core/modules/options/src/Tests/OptionsFieldUITest.php b/core/modules/options/src/Tests/OptionsFieldUITest.php
index 969ce8e..c42ba5d 100644
--- a/core/modules/options/src/Tests/OptionsFieldUITest.php
+++ b/core/modules/options/src/Tests/OptionsFieldUITest.php
@@ -278,6 +278,7 @@ protected function createOptionsField($type) {
   function assertAllowedValuesInput($input_string, $result, $message) {
     $edit = array('field[settings][allowed_values]' => $input_string);
     $this->drupalPostForm($this->admin_path, $edit, t('Save field settings'));
+    $this->assertNoRaw('&amp;lt;', 'The page does not have double escaped HTML tags.');
 
     if (is_string($result)) {
       $this->assertText($result, $message);