diff --git a/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php b/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php
index bd7bf0c..ce0dcf4 100644
--- a/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php
+++ b/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php
@@ -17,11 +17,13 @@
 class StandardTest extends UnitTestCase {
 
   /**
-   * The tested text editor XSS filter.
+   * String indicating the text editor XSS filter to be tested.
    *
-   * @var \Drupal\editor\EditorXssFilter\Standard
+   * It identifies a class that implements \Drupal\editor\EditorXssFilterInterface.
+   *
+   * @var string
    */
-  protected $editorXssFilterClass;
+  protected $filterUnderTest;
 
   /**
    * The mocked text format configuration entity.
@@ -31,7 +33,7 @@ class StandardTest extends UnitTestCase {
   protected $format;
 
   protected function setUp() {
-    $this->editorXssFilterClass = '\Drupal\editor\EditorXssFilter\Standard';
+    $this->filterUnderTest = '\Drupal\editor\EditorXssFilter\Standard';
 
     // Mock text format configuration entity object.
     $this->format = $this->getMockBuilder('\Drupal\filter\Entity\FilterFormat')
@@ -538,7 +540,7 @@ public function providerTestFilterXss() {
    * @dataProvider providerTestFilterXss
    */
   public function testFilterXss($input, $expected_output) {
-    $output = call_user_func($this->editorXssFilterClass . '::filterXss', $input, $this->format);
+    $output = call_user_func($this->filterUnderTest . '::filterXss', $input, $this->format);
     $this->assertSame($expected_output, $output);
   }