--- /dev/null
+<?php
+
+namespace Drupal\Core;
+
+/**
+ * An interface for running cron tasks.
+ *
+ * @see https://www.drupal.org/cron
+ */
+interface CronInterface {
+
+ /**
+ * Executes a cron run.
+ *
+ * Do not call this function from a test. Use $this->cronRun() instead.
+ *
+ * @return bool
+ * TRUE upon success, FALSE otherwise.
+ */
+ public function run();
+
+}