diff --git a/tests/thinkphp/library/think/cache/driver/apcTest.php b/tests/thinkphp/library/think/cache/driver/apcTest.php
index 373ba003..92e3c131 100644
--- a/tests/thinkphp/library/think/cache/driver/apcTest.php
+++ b/tests/thinkphp/library/think/cache/driver/apcTest.php
@@ -50,14 +50,4 @@ class apcTest extends cacheTestCase
     {
     }
 
-    public function testQueue()
-    {
-        $cache = $this->getCacheInstance();
-        $this->assertTrue($cache->set('1', '1'));
-        $this->assertTrue($cache->set('2', '2'));
-        $this->assertTrue($cache->set('3', '3'));
-        $this->assertEquals(1, $cache->get('1'));
-        $this->assertTrue($cache->set('4', '4'));
-        $this->assertFalse($cache->get('1'));
-    }
 }
diff --git a/tests/thinkphp/library/think/cache/driver/cacheTestCase.php b/tests/thinkphp/library/think/cache/driver/cacheTestCase.php
index 328296d3..75ecc816 100644
--- a/tests/thinkphp/library/think/cache/driver/cacheTestCase.php
+++ b/tests/thinkphp/library/think/cache/driver/cacheTestCase.php
@@ -159,4 +159,15 @@ abstract class cacheTestCase extends \PHPUnit_Framework_TestCase
         $this->assertEquals('a', Cache::get('a'));
         $this->assertNotNull(Cache::rm('a'));
     }
+
+    public function testQueue()
+    {
+        $cache = $this->prepare();
+        $this->assertTrue($cache->set('1', '1'));
+        $this->assertTrue($cache->set('2', '2'));
+        $this->assertTrue($cache->set('3', '3'));
+        $this->assertEquals(1, $cache->get('1'));
+        $this->assertTrue($cache->set('4', '4'));
+        $this->assertFalse($cache->get('1'));
+    }
 }
diff --git a/tests/thinkphp/library/think/cache/driver/memcachedTest.php b/tests/thinkphp/library/think/cache/driver/memcachedTest.php
index 051083c2..05b0877f 100644
--- a/tests/thinkphp/library/think/cache/driver/memcachedTest.php
+++ b/tests/thinkphp/library/think/cache/driver/memcachedTest.php
@@ -35,7 +35,7 @@ class memcachedTest extends cacheTestCase
     protected function getCacheInstance()
     {
         if (null === $this->_cacheInstance) {
-            $this->_cacheInstance = new \think\cache\driver\Memcached();
+            $this->_cacheInstance = new \think\cache\driver\Memcached(['length' => 3]);
         }
         return $this->_cacheInstance;
     }
diff --git a/tests/thinkphp/library/think/cache/driver/redisTest.php b/tests/thinkphp/library/think/cache/driver/redisTest.php
index c40cb68b..577cbe2a 100644
--- a/tests/thinkphp/library/think/cache/driver/redisTest.php
+++ b/tests/thinkphp/library/think/cache/driver/redisTest.php
@@ -31,7 +31,7 @@ class redisTest extends cacheTestCase
     protected function getCacheInstance()
     {
         if (null === $this->_cacheInstance) {
-            $this->_cacheInstance = new \think\cache\driver\Redis();
+            $this->_cacheInstance = new \think\cache\driver\Redis(['length' => 3]);
         }
         return $this->_cacheInstance;
     }