diff --git a/object-cache.php b/object-cache.php
index d0a54f2aeb3c7c0309299b561eaf87e2091cebb5..23ab4b8d5e6b4feaca1737d7acbb980c65dbfe17 100644
--- a/object-cache.php
+++ b/object-cache.php
@@ -913,6 +913,7 @@ class WP_Object_Cache {
 			sleep( $delay );
 		}
 
+		$this->cache = array();
 		$result = $this->redis->flushall();
 
 		return $result;