diff --git a/test/aprsme_web/live/packets_live/callsign_view_test.exs b/test/aprsme_web/live/packets_live/callsign_view_test.exs
index cf2b707..483342a 100644
--- a/test/aprsme_web/live/packets_live/callsign_view_test.exs
+++ b/test/aprsme_web/live/packets_live/callsign_view_test.exs
@@ -31,6 +31,74 @@ defmodule AprsmeWeb.PacketsLive.CallsignViewTest do
     end
   end
 
+  describe "live packet broadcast edge cases" do
+    test "broadcasts exceeding 100 packets carry the oldest out of live buffer", %{conn: conn} do
+      # Pre-seed a packet so stored=[packet], live=[].
+      _p =
+        packet_fixture(%{
+          sender: "OVERFLOW-1",
+          base_callsign: "OVERFLOW",
+          ssid: "1",
+          received_at: DateTime.utc_now(),
+          lat: Decimal.new("33.0"),
+          lon: Decimal.new("-96.0")
+        })
+
+      {:ok, view, _html} = live(conn, "/packets/OVERFLOW-1", on_error: :warn)
+
+      # Broadcast enough live packets to overflow the 100-packet total.
+      for i <- 1..110 do
+        payload = %{
+          sender: "OVERFLOW-1",
+          base_callsign: "OVERFLOW",
+          ssid: "1",
+          received_at: DateTime.add(DateTime.utc_now(), i, :second),
+          data_type: :position,
+          destination: "APRS",
+          path: "",
+          device_identifier: "APRS",
+          data_extended: %{symbol_table_id: "/", symbol_code: ">"}
+        }
+
+        Phoenix.PubSub.broadcast(
+          Aprsme.PubSub,
+          "packets:OVERFLOW-1",
+          {:postgres_packet, payload}
+        )
+      end
+
+      Process.sleep(100)
+      html = render(view)
+      assert html =~ "OVERFLOW-1"
+    end
+
+    test "handles broadcast with iso8601 string timestamp", %{conn: conn} do
+      {:ok, view, _html} = live(conn, "/packets/STRTIME-1", on_error: :warn)
+
+      payload = %{
+        sender: "STRTIME-1",
+        base_callsign: "STRTIME",
+        ssid: "1",
+        received_at: DateTime.to_iso8601(DateTime.utc_now()),
+        data_type: :position,
+        destination: "APRS",
+        path: "",
+        data_extended: %{symbol_table_id: "/", symbol_code: ">"}
+      }
+
+      Phoenix.PubSub.broadcast(Aprsme.PubSub, "packets:STRTIME-1", {:postgres_packet, payload})
+      Process.sleep(30)
+      assert render(view) =~ "STRTIME-1"
+    end
+
+    test "ignores unknown messages without crashing", %{conn: conn} do
+      {:ok, view, _html} = live(conn, "/packets/UNKMSG-1", on_error: :warn)
+      send(view.pid, :some_random)
+      Process.sleep(20)
+      assert Process.alive?(view.pid)
+    end
+  end
+
   describe "live packet broadcast" do
     test "handles raw broadcast packet without :data key", %{conn: conn} do
       {:ok, view, _html} = live(conn, "/packets/DB0WUN-13")