diff --git a/test/data/zt_config.sql b/test/data/zt_config.sql
index 0719d3142c..1c994dfebe 100644
--- a/test/data/zt_config.sql
+++ b/test/data/zt_config.sql
@@ -8,7 +8,7 @@ INSERT INTO `zt_config` (`id`, `vision`, `owner`, `module`, `section`, `key`, `v
 (6,	'rnd',	'system',	'project',	'',	'unitList',	'CNY,USD'),
 (7,	'rnd',	'system',	'project',	'',	'defaultCurrency',	'CNY'),
 (8,	'rnd',	'system',	'story',	'',	'reviewRules',	'allpass'),
-(10,	'rnd',	'system',	'common',	'global',	'version',	'17.0.beta1'),
+(10,	'',	'system',	'common',	'global',	'version',	'17.4'),
 (11,	'rnd',	'system',	'common',	'global',	'sn',	'c8aa3269e181f2b9258ce96625de1497'),
 (12,	'rnd',	'system',	'common',	'global',	'flow',	'full'),
 (13,	'rnd',	'system',	'common',	'safe',	'mode',	'1'),
diff --git a/test/lib/db.class.php b/test/lib/db.class.php
index 09b502f4eb..c319649560 100644
--- a/test/lib/db.class.php
+++ b/test/lib/db.class.php
@@ -81,6 +81,8 @@ class db
         $dbUsed = $this->getUsedDbList();
         $lastDB = 0;
         if(!empty($dbUsed)) $lastDB = max($dbUsed);
+
+        /* If all db is used. */
         if($lastDB == $this->config->test->dbNum)
         {
             shell_exec("> $this->dbLogFile");
@@ -139,7 +141,7 @@ class db
      */
     function initDB()
     {
-        for($i = 1; $i < 11; $i++)
+        for($i = 1; $i <= $this->config->test->dbNum; $i++)
         {
             $this->dao->query('DROP DATABASE ' . $this->config->test->dbPrefix . $i);
             $this->dao->query('CREATE DATABASE ' . $this->config->test->dbPrefix . $i);