diff --git a/test_set/cvp-spt/tests/test_vm2vm.py b/test_set/cvp-spt/tests/test_vm2vm.py
index 7b3851b..4c2ec98 100644
--- a/test_set/cvp-spt/tests/test_vm2vm.py
+++ b/test_set/cvp-spt/tests/test_vm2vm.py
@@ -71,19 +71,19 @@
         
         transport1 = ssh.SSHTransport(vm_info[0]['fip'], 'ubuntu', password='dd', private_key=os_resources['keypair'].private_key)
 
-        result1 = transport1.exec_command('iperf -c {} | tail -n 1'.format(vm_info[1]['private_address']))
+        result1 = transport1.exec_command('iperf -c {} -t 60 | tail -n 1'.format(vm_info[1]['private_address']))
         print ' '.join(result1.split()[-2::])
         record_property("same {0}-{1}".format(zone1[0],zone2[0]), ' '.join(result1.split()[-2::]))
-        result2 = transport1.exec_command('iperf -c {} | tail -n 1'.format(vm_info[2]['private_address']))
+        result2 = transport1.exec_command('iperf -c {} -t 60 | tail -n 1'.format(vm_info[2]['private_address']))
         print ' '.join(result2.split()[-2::])
         record_property("diff host {0}-{1}".format(zone1[0],zone2[0]), ' '.join(result2.split()[-2::]))
-        result3 = transport1.exec_command('iperf -c {} -P 10 | tail -n 1'.format(vm_info[2]['private_address']))
+        result3 = transport1.exec_command('iperf -c {} -P 10 -t 60 | tail -n 1'.format(vm_info[2]['private_address']))
         print ' '.join(result3.split()[-2::])
         record_property("dif host 10 threads {0}-{1}".format(zone1[0],zone2[0]), ' '.join(result3.split()[-2::]))
-        result4 = transport1.exec_command('iperf -c {} | tail -n 1'.format(vm_info[2]['fip']))
+        result4 = transport1.exec_command('iperf -c {} -t 60 | tail -n 1'.format(vm_info[2]['fip']))
         print ' '.join(result4.split()[-2::])
         record_property("diff host fip {0}-{1}".format(zone1[0],zone2[0]), ' '.join(result4.split()[-2::]))
-        result5 = transport1.exec_command('iperf -c {} | tail -n 1'.format(vm_info[3]['private_address']))
+        result5 = transport1.exec_command('iperf -c {} -t 60 | tail -n 1'.format(vm_info[3]['private_address']))
         print ' '.join(result5.split()[-2::])
         record_property("diff host, diff net {0}-{1}".format(zone1[0],zone2[0]), ' '.join(result5.split()[-2::]))