diff --git a/fec_integration_tests/interface/interface_functions/test_database_interface.py b/fec_integration_tests/interface/interface_functions/test_database_interface.py
index 237f892315..d5a7a0f3f5 100644
--- a/fec_integration_tests/interface/interface_functions/test_database_interface.py
+++ b/fec_integration_tests/interface/interface_functions/test_database_interface.py
@@ -131,7 +131,8 @@ def test_database_interface():
 
     _make_m_vertices(app_vertex_1, 10, 10)
     _make_m_vertices(app_vertex_2, 20, 20)
-    params = LivePacketGatherParameters(label="LiveSpikeReceiver")
+    params = LivePacketGatherParameters(
+        label="LiveSpikeReceiver", port=10000, hostname="localhost")
     lpg_vertex = LivePacketGather(params, label="LiveSpikeReceiver")
     writer.add_vertex(lpg_vertex)
     writer.add_edge(ApplicationEdge(app_vertex_1, lpg_vertex), "Test")
diff --git a/fec_integration_tests/interface/interface_functions/test_front_end_common_insert_lpgs.py b/fec_integration_tests/interface/interface_functions/test_front_end_common_insert_lpgs.py
index b02809ff17..ee63f37f9a 100644
--- a/fec_integration_tests/interface/interface_functions/test_front_end_common_insert_lpgs.py
+++ b/fec_integration_tests/interface/interface_functions/test_front_end_common_insert_lpgs.py
@@ -57,8 +57,8 @@ def test_that_3_lpgs_are_generated_on_3_board_app_graph(self):
             'payload_prefix': None,
             'payload_right_shift': 0,
             'number_of_packets_sent_per_time_step': 0,
-            'hostname': None,
-            'port': None,
+            'hostname': 'localhost',
+            'port': 1000,
             'strip_sdp': None,
             'tag': None,
             'label': "Test"}
diff --git a/spinn_front_end_common/utilities/utility_objs/live_packet_gather_parameters.py b/spinn_front_end_common/utilities/utility_objs/live_packet_gather_parameters.py
index 327e9c6bdd..3b786c941f 100644
--- a/spinn_front_end_common/utilities/utility_objs/live_packet_gather_parameters.py
+++ b/spinn_front_end_common/utilities/utility_objs/live_packet_gather_parameters.py
@@ -36,8 +36,7 @@ class LivePacketGatherParameters(object):
         "_received_key_mask", "_translate_keys", "_translated_key_right_shift")
 
     def __init__(
-            self, port: Optional[int] = None, hostname: Optional[str] = None,
-            tag=None, strip_sdp=True,
+            self, port: int, hostname: str, tag=None, strip_sdp=True,
             use_prefix=False, key_prefix=None, prefix_type=None,
             message_type=EIEIOType.KEY_32_BIT, right_shift=0,
             payload_as_time_stamps=True, use_payload_prefix=True,
@@ -89,7 +88,7 @@ def __init__(
         self._translated_key_right_shift = translated_key_right_shift
 
     @property
-    def port(self) -> Optional[int]:
+    def port(self) -> int:
         """
         Where to send data from SpiNNaker:
         the port of the listening UDP socket.
@@ -99,7 +98,7 @@ def port(self) -> Optional[int]:
         return self._port
 
     @property
-    def hostname(self) -> Optional[str]:
+    def hostname(self) -> str:
         """
         Where to send data from SpiNNaker: the host name of the listening UDP
         socket.
diff --git a/unittests/data/test_simulator_data.py b/unittests/data/test_simulator_data.py
index 6a0e2b74aa..76eee4fc13 100644
--- a/unittests/data/test_simulator_data.py
+++ b/unittests/data/test_simulator_data.py
@@ -454,8 +454,8 @@ def test_live_packet_recorder_params(self):
         self.assertFalse(FecDataView.has_live_packet_recorder_params())
         with self.assertRaises(DataNotYetAvialable):
             FecDataView.get_live_packet_recorder_params()
-        lpg1 = LivePacketGatherParameters(1)
-        lpg2 = LivePacketGatherParameters(2)
+        lpg1 = LivePacketGatherParameters(1, hostname="localhost")
+        lpg2 = LivePacketGatherParameters(2, hostname="localhost")
         vertex1 = SimpleTestVertex(1, "1")
         vertex2 = SimpleTestVertex(2, "2")
         vertex3 = SimpleTestVertex(3, "3")