diff --git a/library/think/cache/driver/Redis.php b/library/think/cache/driver/Redis.php
index e31d38f7..23455a1d 100644
--- a/library/think/cache/driver/Redis.php
+++ b/library/think/cache/driver/Redis.php
@@ -15,7 +15,9 @@ use think\Cache;
 use think\Exception;
 
 /**
- * Redis缓存驱动
+ * Redis缓存驱动，适合单机部署、有前端代理实现高可用的场景，性能最好
+ * 有需要在业务层实现读写分离、或者使用RedisCluster的需求，请使用Redisd驱动
+ * 
  * 要求安装phpredis扩展：https://github.com/nicolasff/phpredis
  * @author    尘缘 <130775@qq.com>
  */
@@ -26,8 +28,8 @@ class Redis
         'host'       => '127.0.0.1',
         'port'       => 6379,
         'password'   => '',
-        'timeout'    => false,
-        'expire'     => false,
+        'timeout'    => 0,
+        'expire'     => 0,
         'persistent' => false,
         'length'     => 0,
         'prefix'     => '',
@@ -48,9 +50,8 @@ class Redis
         }
         $func          = $this->options['persistent'] ? 'pconnect' : 'connect';
         $this->handler = new \Redis;
-        false === $this->options['timeout'] ?
-        $this->handler->$func($this->options['host'], $this->options['port']) :
         $this->handler->$func($this->options['host'], $this->options['port'], $this->options['timeout']);
+
         if ('' != $this->options['password']) {
             $this->handler->auth($this->options['password']);
         }
@@ -86,7 +87,7 @@ class Redis
         $name = $this->options['prefix'] . $name;
         //对数组/对象数据进行缓存处理，保证数据完整性  byron sampson<xiaobo.sun@qq.com>
         $value = (is_object($value) || is_array($value)) ? json_encode($value) : $value;
-        if (is_int($expire)) {
+        if (is_int($expire) && $expire) {
             $result = $this->handler->setex($name, $expire, $value);
         } else {
             $result = $this->handler->set($name, $value);
diff --git a/tests/thinkphp/library/think/cache/driver/cacheTestCase.php b/tests/thinkphp/library/think/cache/driver/cacheTestCase.php
index ff123c13..c7bd407c 100644
--- a/tests/thinkphp/library/think/cache/driver/cacheTestCase.php
+++ b/tests/thinkphp/library/think/cache/driver/cacheTestCase.php
@@ -75,6 +75,9 @@ abstract class cacheTestCase extends \PHPUnit_Framework_TestCase
         $array = $cache->get('array_test');
         $this->assertArrayHasKey('array_test', $array);
         $this->assertEquals('array_test', $array['array_test']);
+        
+        $result = $cache->set('no_expire', 1, 0);
+        $this->assertTrue($result);
     }
 
     /**
diff --git a/tests/thinkphp/library/think/cache/driver/dbTest.php b/tests/thinkphp/library/think/cache/driver/dbTest.php
deleted file mode 100644
index 9c896d4f..00000000
--- a/tests/thinkphp/library/think/cache/driver/dbTest.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-// +----------------------------------------------------------------------
-// | ThinkPHP [ WE CAN DO IT JUST THINK ]
-// +----------------------------------------------------------------------
-// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
-// +----------------------------------------------------------------------
-// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
-// +----------------------------------------------------------------------
-// | Author: liu21st <liu21st@gmail.com>
-// +----------------------------------------------------------------------
-
-/**
- * 数据库缓存驱动测试
- * @author    mahuan <mahuan@d1web.top>
- */
-
-namespace tests\thinkphp\library\think\cache\driver;
-
-class dbTest extends cacheTestCase
-{
-    private $_cacheInstance = null;
-
-    /**
-     * 基境缓存类型
-     */
-    protected function setUp()
-    {
-        //数据库缓存测试因为缺少数据库单元测试所以暂时跳过
-        $this->markTestSkipped("暂时跳过测试。");
-        \think\Cache::connect(array('type' => 'db', 'expire' => 2));
-    }
-
-    /**
-     * @return DbCache
-     */
-    protected function getCacheInstance()
-    {
-        if (null === $this->_cacheInstance) {
-            $this->_cacheInstance = new \think\cache\driver\Db();
-        }
-        return $this->_cacheInstance;
-    }
-}