diff --git a/examples/renderTest.php b/examples/renderTest.php
index 2b2afbd..cafe600 100644
--- a/examples/renderTest.php
+++ b/examples/renderTest.php
@@ -239,7 +239,7 @@ foreach($taskModel->childsParams as $childParams){
     }
     $scene->registerMaterial($material);
 
-    $plyFileSavaPath = $cacheFileDir.basename($childParams->childPlyFile);
+    $plyFileSavaPath = $cacheFileDir.'/'.basename($childParams->childPlyFile);
     $plyFileHandle = fopen($plyFileSavaPath, "w");
     (new Client())->get($childParams->childPlyFile, [RequestOptions::SINK => $plyFileHandle]);
     $obj = new Objects();