fixed a bug in test_external.py
fixed a bug in test_external.py

seabirdzh/disco,ktkt2009/disco,seabirdzh/disco,ErikDubbelboer/disco,ErikDubbelboer/disco,oldmantaiter/disco,pooya/disco,ErikDubbelboer/disco,simudream/disco,pombredanne/disco,discoproject/disco,mwilliams3/disco,pavlobaron/disco_playground,ErikDubbelboer/disco,discoproject/disco,oldmantaiter/disco,pavlobaron/disco_playground,pavlobaron/disco_playground,pombredanne/disco,ktkt2009/disco,mozilla/disco,ktkt2009/disco,pooya/disco,oldmantaiter/disco,simudream/disco,discoproject/disco,mwilliams3/disco,mwilliams3/disco,seabirdzh/disco,mozilla/disco,ErikDubbelboer/disco,discoproject/disco,ktkt2009/disco,mozilla/disco,simudream/disco,scrapinghub/disco,pombredanne/disco,pooya/disco,mwilliams3/disco,scrapinghub/disco,pombredanne/disco,oldmantaiter/disco,scrapinghub/disco,beni55/disco,scrapinghub/disco,pavlobaron/disco_playground,ktkt2009/disco,discoproject/disco,mozilla/disco,pooya/disco,pombredanne/disco,mwilliams3/disco,beni55/disco,simudream/disco,beni55/disco,beni55/disco,simudream/disco,beni55/disco,seabirdzh/disco,seabirdzh/disco,oldmantaiter/disco