diff --git a/ext/soap/tests/bugs/bug55639.phpt b/ext/soap/tests/bugs/bug55639.phpt
index 40a2cf3f11d..16d7f7a3771 100644
--- a/ext/soap/tests/bugs/bug55639.phpt
+++ b/ext/soap/tests/bugs/bug55639.phpt
@@ -53,7 +53,7 @@ var_dump($headers);
 ?>
 --EXPECTF--
 Unauthorized
-string(424) "POST / HTTP/1.1
+string(%d) "POST / HTTP/1.1
 Host: %s
 Connection: Keep-Alive
 User-Agent: %s