diff --git a/core/modules/contact/lib/Drupal/contact/Tests/ContactAuthenticatedUserTest.php b/core/modules/contact/lib/Drupal/contact/Tests/ContactAuthenticatedUserTest.php
index db1a64e..059923f 100644
--- a/core/modules/contact/lib/Drupal/contact/Tests/ContactAuthenticatedUserTest.php
+++ b/core/modules/contact/lib/Drupal/contact/Tests/ContactAuthenticatedUserTest.php
@@ -13,6 +13,12 @@ use Drupal\simpletest\WebTestBase;
  * Tests the contact form for authenticated users.
  */
 class ContactAuthenticatedUserTest extends WebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
   public static $modules = array('contact');
 
   public static function getInfo() {
diff --git a/core/modules/contact/lib/Drupal/contact/Tests/ContactPersonalTest.php b/core/modules/contact/lib/Drupal/contact/Tests/ContactPersonalTest.php
index 951f92f..16d26b0 100644
--- a/core/modules/contact/lib/Drupal/contact/Tests/ContactPersonalTest.php
+++ b/core/modules/contact/lib/Drupal/contact/Tests/ContactPersonalTest.php
@@ -13,6 +13,12 @@ use Drupal\simpletest\WebTestBase;
  * Tests the personal contact form.
  */
 class ContactPersonalTest extends WebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
   public static $modules = array('contact');
 
   private $admin_user;
diff --git a/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php b/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php
index ed68ca5..7eae709 100644
--- a/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php
+++ b/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php
@@ -13,6 +13,12 @@ use Drupal\simpletest\WebTestBase;
  * Tests the site-wide contact form.
  */
 class ContactSitewideTest extends WebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
   public static $modules = array('contact');
 
   public static function getInfo() {