diff --git a/tests/src/Functional/LoadTest.php b/tests/src/Functional/LoadTest.php
index 8201c22..b2ea881 100644
--- a/tests/src/Functional/LoadTest.php
+++ b/tests/src/Functional/LoadTest.php
@@ -17,7 +17,7 @@ class LoadTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = ['comment_approver'];
+  protected static $modules = ['comment_approver'];
 
   /**
    * A user with permission to administer site configuration.