diff -u b/core/modules/page_cache/src/Tests/PageCacheTest.php b/core/modules/page_cache/src/Tests/PageCacheTest.php
--- b/core/modules/page_cache/src/Tests/PageCacheTest.php
+++ b/core/modules/page_cache/src/Tests/PageCacheTest.php
@@ -3,6 +3,7 @@
 namespace Drupal\page_cache\Tests;
 
 use Drupal\Component\Datetime\DateTimePlus;
+use Drupal\Core\Site\Settings;
 use Drupal\Core\Url;
 use Drupal\entity_test\Entity\EntityTest;
 use Drupal\simpletest\WebTestBase;
@@ -374,6 +375,14 @@
       $this->drupalGet($content_url);
       $this->assertResponse($code);
       $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS');
+
+      // Ensure the expires date on the cache entry uses negative_cache_ttl.
+      $cache_entry = \Drupal::service('cache.render')->get($this->getUrl() . ':html');
+      $difference = $cache_entry->expire - (int) $cache_entry->created;
+      // Account for any rounding errors by rounding the difference ot the
+      // nearest 10. As long as negative_cache_ttl is a multiple of 10 then this
+      // will work.
+      $this->assertEqual(round($difference, -1), Settings::get('negative_cache_ttl', 3600), 'The cache entry expiry time uses the negative_cache_ttl setting.');
     }
 
     // Disable 403 and 404 caching.