diff --git a/core/modules/system/lib/Drupal/system/Tests/Module/DependencyTest.php b/core/modules/system/lib/Drupal/system/Tests/Module/DependencyTest.php
index 104c927..a94d861 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Module/DependencyTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Module/DependencyTest.php
@@ -139,7 +139,7 @@ function testModuleEnableOrder() {
     // - options depends on number
     // - ban depends on php (via module_test)
     // The correct enable order is:
-    $expected_order = array('php', 'ban', 'comment', 'history', 'number', 'options', 'taxonomy', 'forum');
+    $expected_order = array('php', 'ban', 'datetime', 'comment', 'history', 'number', 'options', 'taxonomy', 'forum');
 
     // Enable the modules through the UI, verifying that the dependency chain
     // is correct.