diff --git a/tests/Stripe/HttpClient/CurlClientTest.php b/tests/Stripe/HttpClient/CurlClientTest.php
index 3479627cc..5bd714c56 100644
--- a/tests/Stripe/HttpClient/CurlClientTest.php
+++ b/tests/Stripe/HttpClient/CurlClientTest.php
@@ -147,7 +147,7 @@ public function testDefaultOptions()
         // make sure closure-based options work properly, including argument passing
         $ref = null;
         $withClosure = new CurlClient(static function ($method, $absUrl, $headers, $params, $hasFile) use (&$ref) {
-            $ref = \func_get_args();
+            $ref = [$method, $absUrl, $headers, $params, $hasFile];
 
             return [];
         });