diff --git a/tests/ExporterTest.php b/tests/ExporterTest.php
index 5d2a283..e985837 100644
--- a/tests/ExporterTest.php
+++ b/tests/ExporterTest.php
@@ -64,7 +64,7 @@ class ExporterTest extends TestCase
         $obj->self        = $obj;
 
         $storage = new SplObjectStorage;
-        $storage->attach($obj2);
+        $storage->offsetSet($obj2);
         @$storage->foo = $obj2;
 
         $resource = fopen('php://memory', 'r');