diff --git a/tests/thinkphp/library/think/debugTest.php b/tests/thinkphp/library/think/debugTest.php
index 0f08cb7b..fe5e8f51 100644
--- a/tests/thinkphp/library/think/debugTest.php
+++ b/tests/thinkphp/library/think/debugTest.php
@@ -118,7 +118,7 @@ class debugTest extends \PHPUnit_Framework_TestCase
     {
         $useMem = \think\Debug::getUseMem();
 
-        $this->assertLessThan(13, explode(" ", $useMem)[0]);
+        $this->assertLessThan(15, explode(" ", $useMem)[0]);
     }
 
     /**