diff --git a/core/modules/views/lib/Drupal/views/Tests/Handler/ArgumentDateTest.php b/core/modules/views/lib/Drupal/views/Tests/Handler/ArgumentDateTest.php
index 5dc679c..6d144b4 100644
--- a/core/modules/views/lib/Drupal/views/Tests/Handler/ArgumentDateTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/Handler/ArgumentDateTest.php
@@ -33,13 +33,6 @@ class ArgumentDateTest extends ViewUnitTestBase {
   public static $modules = array('node', 'user');
 
   /**
-   * Stores the plugin ID used in the current test method.
-   *
-   * @var string
-   */
-  protected $usedPlugin = 'date';
-
-  /**
    * Stores the column map for this testCase.
    *
    * @var array