diff --git a/core/modules/datetime/src/Tests/Views/FilterDateTimeTest.php b/core/modules/datetime/src/Tests/Views/FilterDateTimeTest.php
index be36791..01403d5 100644
--- a/core/modules/datetime/src/Tests/Views/FilterDateTimeTest.php
+++ b/core/modules/datetime/src/Tests/Views/FilterDateTimeTest.php
@@ -32,7 +32,9 @@ public function setUp() {
       '2000-10-10',
       '2001-10-10',
       '2002-10-10',
-      \Drupal::service('date.formatter')->format(REQUEST_TIME + 86400, 'custom', 'Y-m-d'),
+      // For the offset test, put a date 24 hours in the future. The `time()`
+      // function is used in case REQUEST_TIME is stale from long-running tests.
+      \Drupal::service('date.formatter')->format(time() + 86400, 'custom', 'Y-m-d'),
     );
     foreach ($dates as $date) {
       $this->nodes[] = $this->drupalCreateNode(array(