diff --git a/networking_generic_switch/tests/unit/netmiko/test_dell.py b/networking_generic_switch/tests/unit/netmiko/test_dell.py
index f489ed4e..8b16a140 100644
--- a/networking_generic_switch/tests/unit/netmiko/test_dell.py
+++ b/networking_generic_switch/tests/unit/netmiko/test_dell.py
@@ -191,7 +191,7 @@ def test_add_network(self, m_exec):
     @mock.patch('networking_generic_switch.devices.netmiko_devices.'
                 'NetmikoSwitch.send_commands_to_device')
     def test_add_network_with_trunk_ports(self, mock_exec):
-        switch = self._make_switch_device({'ngs_trunk_ports': 'port1, port2'})
+        switch = self._make_switch_device({'ngs_trunk_ports': 'port1,port2'})
         switch.add_network(33, '0ae071f5-5be9-43e4-80ea-e41fefe85b21')
         mock_exec.assert_called_with(
             ['interface vlan 33',
@@ -212,7 +212,7 @@ def test_del_network(self, mock_exec):
     @mock.patch('networking_generic_switch.devices.netmiko_devices.'
                 'NetmikoSwitch.send_commands_to_device')
     def test_del_network_with_trunk_ports(self, mock_exec):
-        switch = self._make_switch_device({'ngs_trunk_ports': 'port1, port2'})
+        switch = self._make_switch_device({'ngs_trunk_ports': 'port1,port2'})
         switch.del_network(33, '0ae071f55be943e480eae41fefe85b21')
         mock_exec.assert_called_with(
             ['interface port1', 'no switchport trunk allowed vlan 33', 'exit',