Fixed potential delay issue in test #560

(cherry picked from commit fcdcc3a)

Author: Geolim4

tests/issues/Github-560.test.php

@@ -31,8 +31,8 @@
  */
 $cacheItem = $cacheInstance->getItem($cacheKey);
 $cacheItem->set($string);
-$now = time();
 $cacheInstance->save($cacheItem);
+$now = time();
 
 /**
  * Delete memory references