diff --git a/tests/src/Kernel/DateProcessorTest.php b/tests/src/Kernel/DateProcessorTest.php
index dbe129b5386ad0420ab700bc9962e3a69218e408..c5855722a7d5ecb08f112135c0d53113a83d55be 100644
--- a/tests/src/Kernel/DateProcessorTest.php
+++ b/tests/src/Kernel/DateProcessorTest.php
@@ -34,7 +34,7 @@ class DateProcessorTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'user',
     'monolog',
     'monolog_elasticsearch_date_processor',