diff --git a/core/modules/datetime_range/tests/src/Functional/DateRangeFormatterSettingsUpdateTest.php b/core/modules/datetime_range/tests/src/Functional/DateRangeFormatterSettingsUpdateTest.php
index d6b8261721641d51e9de532ba33c5cf8ceac87a7..841eb93bc28c24e88aba8adaf739bcf8d770cb33 100644
--- a/core/modules/datetime_range/tests/src/Functional/DateRangeFormatterSettingsUpdateTest.php
+++ b/core/modules/datetime_range/tests/src/Functional/DateRangeFormatterSettingsUpdateTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Drupal\Tests\datetime_range\Functional;
 
 use Drupal\FunctionalTests\Update\UpdatePathTestBase;