diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/filter/BooleanOperator.php b/core/modules/views/lib/Drupal/views/Plugin/views/filter/BooleanOperator.php
index 971d2eb..017f15b 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/filter/BooleanOperator.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/filter/BooleanOperator.php
@@ -211,7 +211,10 @@ public function query() {
   }
 
   /**
+   * Adds a where condition to the query for a boolean value.
+   *
    * @param string $field
+   *   The field name to add the where condition for.
    */
   protected function queryOpBoolean($field) {
     if (empty($this->value)) {
diff --git a/core/modules/views/lib/Drupal/views/Tests/Handler/FilterBooleanOperatorTest.php b/core/modules/views/lib/Drupal/views/Tests/Handler/FilterBooleanOperatorTest.php
index 883ff22..d354f0f 100644
--- a/core/modules/views/lib/Drupal/views/Tests/Handler/FilterBooleanOperatorTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/Handler/FilterBooleanOperatorTest.php
@@ -10,7 +10,9 @@
 use Drupal\views\Tests\ViewUnitTestBase;
 
 /**
- * Tests the core Drupal\views\Plugin\views\filter\InOperator handler.
+ * Tests the BooleanOperator filter handler.
+ *
+ * @see \Drupal\views\Plugin\views\filter\BooleanOperator
  */
 class FilterBooleanOperatorTest extends ViewUnitTestBase {
 
@@ -46,11 +48,14 @@ protected function setUp() {
     $this->installSchema('system', array('menu_router', 'variable', 'key_value_expire'));
   }
 
+  /**
+   * Tests the BooleanOperator filter.
+   */
   public function testFilterBooleanOperator() {
     $view = views_get_view('test_view');
     $view->setDisplay();
 
-    // Add a in_operator ordering.
+    // Add a the status boolean filter.
     $view->displayHandlers->get('default')->overrideOption('filters', array(
       'status' => array(
         'id' => 'status',
@@ -72,7 +77,7 @@ public function testFilterBooleanOperator() {
     $view->destroy();
     $view->setDisplay();
 
-    // Add a in_operator ordering.
+    // Add the status boolean filter.
     $view->displayHandlers->get('default')->overrideOption('filters', array(
       'status' => array(
         'id' => 'status',