diff --git a/lib/Pinpoint/Common/AbstractClassFile.php b/lib/Pinpoint/Common/AbstractClassFile.php
index 5b52cfa..87e0dbe 100644
--- a/lib/Pinpoint/Common/AbstractClassFile.php
+++ b/lib/Pinpoint/Common/AbstractClassFile.php
@@ -120,8 +120,13 @@ public function markHasYield()
 
     public function done()
     {
-
-        $fullPath = Utils::$CLS_DIR . '/' . str_replace('\\', '/', $this->className) . '.php';
+        // only for support phpunit test
+        if (defined('PHPUNIT_COMPOSER_INSTALL')) {
+            $fullPath = Utils::$CLS_DIR . '/' . str_replace('\\', '/', $this->className) . '.php';
+        } else {
+            $file_uuid_name = uniqid("pinpoint_");
+            $fullPath = Utils::$CLS_DIR . '/' . $file_uuid_name . '.php';
+        }
         $context = $this->_astPrinter->prettyPrintFile($this->newAstNode);
         MonitorClass::getInstance()->insertMapping($this->className, $fullPath);
         Logger::Inst()->debug("map/save new class '$this->className' to '$fullPath' ");