diff --git a/server/tests/test_transport_policy.py b/server/tests/test_transport_policy.py
new file mode 100644
index 0000000..901fa51
--- /dev/null
+++ b/server/tests/test_transport_policy.py
@@ -0,0 +1,31 @@
+from transport_policy import Delivery, delivery_for_packet_type, is_snapshot_packet
+
+
+def test_snapshot_packets_use_unreliable_sequenced_delivery():
+    assert delivery_for_packet_type("transform") is Delivery.UNRELIABLE_SEQUENCED
+    assert delivery_for_packet_type("npcState") is Delivery.UNRELIABLE_SEQUENCED
+    assert is_snapshot_packet("transform")
+    assert is_snapshot_packet("npcState")
+
+
+def test_gameplay_and_control_packets_use_reliable_ordered_delivery():
+    reliable_types = (
+        "hello",
+        "sessionReady",
+        "worldState",
+        "combatHit",
+        "npcAuthority",
+        "positionCorrection",
+        "disconnect",
+        "sessionEnded",
+        "equipmentState",
+        "actionEvent",
+        "playerState",
+    )
+    for packet_type in reliable_types:
+        assert delivery_for_packet_type(packet_type) is Delivery.RELIABLE_ORDERED
+        assert not is_snapshot_packet(packet_type)
+
+
+def test_unknown_packet_types_never_default_to_unreliable():
+    assert delivery_for_packet_type("futureControlPacket") is Delivery.RELIABLE_ORDERED