diff --git a/tests/thinkphp/library/think/debugTest.php b/tests/thinkphp/library/think/debugTest.php
index 7a792d8f..5b5f250e 100644
--- a/tests/thinkphp/library/think/debugTest.php
+++ b/tests/thinkphp/library/think/debugTest.php
@@ -78,7 +78,7 @@ class debugTest extends \PHPUnit_Framework_TestCase
     public function testGetUseTime()
     {
         $time = \think\Debug::getUseTime();
-        $this->assertLessThan(2.5, $time);
+        $this->assertLessThan(3.5, $time);
     }
 
     /**