diff --git a/test/test_ib_gateway_fail.py b/test/test_ib_gateway_fail.py
index af26fcc..68cdfc1 100644
--- a/test/test_ib_gateway_fail.py
+++ b/test/test_ib_gateway_fail.py
@@ -20,7 +20,7 @@ def host(request):
         '--env', 'IB_ACCOUNT={}'.format(account),
         '--env', 'IB_PASSWORD={}'.format(password),
         '--env', 'TRADE_MODE={}'.format(trade_mode),
-        '-p', '4002:4002' \
+        '-p', '4002:4002', \
         '-d', IMAGE_NAME, 
         "tail", "-f", "/dev/null"]).decode().strip()
     # return a testinfra connection to the container