diff --git a/tests/fXmlRpc/Integration/AbstractIntegrationTest.php b/tests/fXmlRpc/Integration/AbstractIntegrationTest.php
index 9e50e9f..7f9de33 100644
--- a/tests/fXmlRpc/Integration/AbstractIntegrationTest.php
+++ b/tests/fXmlRpc/Integration/AbstractIntegrationTest.php
@@ -181,7 +181,7 @@ private function getTransport()
         return [
             new \fXmlRpc\Transport\HttpAdapterTransport(
                 $messageFactory,
-                new \Http\Adapter\Guzzle6\Client()
+                new \Http\Adapter\Guzzle6\Client(new \GuzzleHttp\Client())
             )
         ];
     }