diff --git a/core/modules/simpletest/src/AssertContentTrait.php b/core/modules/simpletest/src/AssertContentTrait.php
index 8668f2d..a35ae10 100644
--- a/core/modules/simpletest/src/AssertContentTrait.php
+++ b/core/modules/simpletest/src/AssertContentTrait.php
@@ -1267,8 +1267,8 @@ protected function assertOption($drupal_selector, $option, $message = '', $group
    *   TRUE on pass, FALSE on fail.
    */
   protected function assertOptionWithDrupalSelector($drupal_selector, $option, $message = '', $group = 'Browser') {
-    $options = $this->xpath('//select[@data-drupal-selector=:data_drupal_selector]//option[@value=:option]', [':data_drupal_selector' => $drupal_selector, ':option' => $option]);
-    return $this->assertTrue(!empty((string) $options[0]), $message ? $message : SafeMarkup::format('Option @option for field @data_drupal_selector exists.', array('@option' => $option, '@data_drupal_selector' => $drupal_selector)), $group);
+    $options = $this->xpath('//select[@data-drupal-selector=:data_drupal_selector]//option[@value=:option]', array(':data_drupal_selector' => $drupal_selector, ':option' => $option));
+    return $this->assertTrue(isset($options[0]), $message ? $message : SafeMarkup::format('Option @option for field @data_drupal_selector exists.', array('@option' => $option, '@data_drupal_selector' => $drupal_selector)), $group);
   }
 
   /**
@@ -1295,7 +1295,7 @@ protected function assertOptionWithDrupalSelector($drupal_selector, $option, $me
   protected function assertNoOption($drupal_selector, $option, $message = '', $group = 'Browser') {
     $selects = $this->xpath('//select[@data-drupal-selector=:data_drupal_selector]', [':data_drupal_selector' => $drupal_selector]);
     $options = $this->xpath('//select[@data-drupal-selector=:data_drupal_selector]//option[@value=:option]', [':data_drupal_selector' => $drupal_selector, ':option' => $option]);
-    return $this->assertTrue(isset($selects[0]->option) && empty($options[0]), $message ? $message : SafeMarkup::format('Option @option for field @data_drupal_selector exists.', array('@option' => $option, '@data_drupal_selector' => $drupal_selector)), $group);
+    return $this->assertTrue(isset($selects[0]->option) && empty($options[0]), $message ? $message : SafeMarkup::format('Option @option for field @data_drupal_selector does not exist.', array('@option' => $option, '@data_drupal_selector' => $drupal_selector)), $group);
   }
 
   /**
@@ -1375,8 +1375,8 @@ protected function assertOptionSelectedWithDrupalSelector($drupal_selector, $opt
    *   TRUE on pass, FALSE on fail.
    */
   protected function assertNoOptionSelected($drupal_selector, $option, $message = '', $group = 'Browser') {
-    $elements = $this->xpath('//select[@data-drupal-selector=:data_drupal_selector]//option[@value=:option]', array(':data_drupal_selector' => $drupal_selector, ':option' => $option));
-    return $this->assertFalse(isset($elements[0]) && !empty($elements[0]['selected']), $message ? $message : SafeMarkup::format('Option @option for field @data_drupal_selector is selected.', array('@option' => $option, '@data_drupal_selector' => $drupal_selector)), $group);
+    $elements = $this->xpath('//select[@drupal_selector=:drupal_selector]//option[@value=:option]', array(':drupal_selector' => $drupal_selector, ':option' => $option));
+    return $this->assertTrue(isset($elements[0]) && empty($elements[0]['selected']), $message ? $message : SafeMarkup::format('Option @option for field @drupal_selector is not selected.', array('@option' => $option, '@drupal_selector' => $drupal_selector)), $group);
   }
 
   /**