diff --git a/src/Psr6/CachePool.php b/src/Psr6/CachePool.php
index 8ae88a4..2f9b92a 100644
--- a/src/Psr6/CachePool.php
+++ b/src/Psr6/CachePool.php
@@ -166,6 +166,7 @@ public function hasItem($key)
      */
     public function clear()
     {
+        $this->_cacheEngine->clear();
         $this->bufferKeys = [];
         $this->buffer = [];
     }