diff --git a/tests/test_vm2vm_different_routers.py b/tests/test_vm2vm_different_routers.py
index 31c4478..612e5be 100644
--- a/tests/test_vm2vm_different_routers.py
+++ b/tests/test_vm2vm_different_routers.py
@@ -125,7 +125,8 @@
         for i in range(len(vms)):
             if transport1.check_vm_is_reachable_ssh(
                     floating_ip=vm_info[i]['fip'], timeout=ssh_timeout):
-                ssh.prepare_iperf(vm_info[i]['fip'], private_key=private_key)
+                ssh.IperfAtVM(
+                    vm_info[i]['fip'], private_key=private_key)
                 mtus.append(transport1.get_mtu_from_vm(
                     vm_info[i]['fip'], private_key=private_key))
         logger.info(