diff --git a/test/microwaveprop/propagation/path_compute_test.exs b/test/microwaveprop/propagation/path_compute_test.exs
index 0d61ce3b..283041f4 100644
--- a/test/microwaveprop/propagation/path_compute_test.exs
+++ b/test/microwaveprop/propagation/path_compute_test.exs
@@ -132,6 +132,80 @@ defmodule Microwaveprop.Propagation.PathComputeTest do
     end
   end
 
+  describe "compute/4 — full pipeline" do
+    setup do
+      Req.Test.stub(Microwaveprop.Terrain.ElevationClient, fn conn ->
+        params = Plug.Conn.fetch_query_params(conn).query_params
+        lat_count = params["latitude"] |> String.split(",") |> length()
+        Req.Test.json(conn, %{"elevation" => List.duplicate(200.0, lat_count)})
+      end)
+
+      :ok
+    end
+
+    @station_params %{
+      src_height_m: 10.0,
+      dst_height_m: 10.0,
+      tx_power_dbm: 30.0,
+      src_gain_dbi: 20.0,
+      dst_gain_dbi: 20.0
+    }
+
+    test "computes a result for a coordinate-pair input" do
+      assert {:ok, result} =
+               PathCompute.compute("32.9, -97.0", "33.5, -96.5", 10_000, @station_params)
+
+      assert result.band_mhz == 10_000
+      assert result.dist_km > 0
+      assert is_float(result.bearing)
+      assert is_map(result.loss_budget)
+      assert is_map(result.power_budget)
+      # No HRRR profiles in the test DB → empty hrrr_points.
+      assert is_list(result.hrrr_points)
+      # Microwave band → no ionosphere readout.
+      assert result.ionosphere == nil
+      # No sounding rows in the test DB.
+      assert result.sounding == nil
+    end
+
+    test "returns {:error, _} when source resolution fails" do
+      assert {:error, _msg} =
+               PathCompute.compute("", "32.9, -97.0", 10_000, @station_params)
+    end
+
+    test "returns {:error, _} when destination resolution fails" do
+      assert {:error, _msg} =
+               PathCompute.compute("32.9, -97.0", "", 10_000, @station_params)
+    end
+
+    test "falls back to a default band config for unknown band_mhz" do
+      # Unknown band falls back to BandConfig.get(10_000).
+      assert {:ok, result} =
+               PathCompute.compute("32.9, -97.0", "33.5, -96.5", 9_999, @station_params)
+
+      assert result.band_mhz == 9_999
+      # Result band_config should be the 10G default.
+      assert result.band_config
+    end
+
+    test "60 GHz band exercises the high-h2o-absorption path" do
+      assert {:ok, result} =
+               PathCompute.compute("32.9, -97.0", "33.5, -96.5", 47_000, @station_params)
+
+      # 47 GHz has substantially more h2o absorption than 10 GHz.
+      assert result.loss_budget.h2o > 0
+    end
+
+    test "Maidenhead grid input round-trips through resolve" do
+      assert {:ok, result} =
+               PathCompute.compute("EM12", "EM13", 10_000, @station_params)
+
+      assert result.dist_km > 0
+      assert result.source.kind == :grid
+      assert result.destination.kind == :grid
+    end
+  end
+
   describe "compute_power_budget/2" do
     test "computes rx power and margins" do
       loss = %{total: 140.0, fspl: 130.0, o2: 3.0, h2o: 5.0, rain: 0.0, diffraction: 2.0}
diff --git a/test/microwaveprop/pskr/client_test.exs b/test/microwaveprop/pskr/client_test.exs
new file mode 100644
index 00000000..78ad686a
--- /dev/null
+++ b/test/microwaveprop/pskr/client_test.exs
@@ -0,0 +1,113 @@
+defmodule Microwaveprop.Pskr.ClientTest do
+  use ExUnit.Case, async: false
+
+  alias Microwaveprop.Pskr.Client
+
+  setup do
+    # Pre-register a placeholder under the global name so the Client
+    # under test loses leader election and goes to :standby — this
+    # avoids any outbound MQTT connection in the test environment.
+    {:ok, placeholder} = Task.start_link(fn -> Process.sleep(:infinity) end)
+    :global.unregister_name(Client)
+    :yes = :global.register_name(Client, placeholder)
+
+    on_exit(fn ->
+      :global.unregister_name(Client)
+      Process.exit(placeholder, :kill)
+    end)
+
+    %{placeholder: placeholder}
+  end
+
+  describe "start_link + init (standby branch)" do
+    test "starts as :standby when the global name is already taken" do
+      {:ok, pid} = GenServer.start_link(Client, name: __MODULE__.NotRegistered)
+      state = :sys.get_state(pid)
+
+      assert state.role == :standby
+      assert state.socket == nil
+      assert state.buffer == <<>>
+      assert is_list(state.bands)
+      assert is_binary(state.client_id)
+
+      GenServer.stop(pid)
+    end
+
+    test "uses defaults for bands when none are passed" do
+      {:ok, pid} = GenServer.start_link(Client, [])
+      state = :sys.get_state(pid)
+
+      assert "6m" in state.bands
+      assert "2m" in state.bands
+      assert "70cm" in state.bands
+
+      GenServer.stop(pid)
+    end
+
+    test "honors custom bands list and aggregator name from opts" do
+      {:ok, pid} = GenServer.start_link(Client, bands: ["2m"], aggregator: SomeOtherAggregator)
+      state = :sys.get_state(pid)
+
+      assert state.bands == ["2m"]
+      assert state.aggregator == SomeOtherAggregator
+
+      GenServer.stop(pid)
+    end
+
+    test "honors custom client_id" do
+      {:ok, pid} = GenServer.start_link(Client, client_id: "test-client-42")
+      state = :sys.get_state(pid)
+      assert state.client_id == "test-client-42"
+      GenServer.stop(pid)
+    end
+  end
+
+  describe "terminate/2" do
+    test "is graceful when state has no socket" do
+      {:ok, pid} = GenServer.start_link(Client, [])
+      # Just normal stop — terminate(_, %{socket: nil_or_other})
+      GenServer.stop(pid)
+      refute Process.alive?(pid)
+    end
+  end
+
+  describe "standby handle_info" do
+    test "nodeup re-runs election (stays standby while name is taken)" do
+      {:ok, pid} = GenServer.start_link(Client, [])
+      send(pid, {:nodeup, :test@nowhere})
+      Process.sleep(50)
+
+      state = :sys.get_state(pid)
+      assert state.role == :standby
+      GenServer.stop(pid)
+    end
+
+    test "nodedown re-runs election (stays standby while name is taken)" do
+      {:ok, pid} = GenServer.start_link(Client, [])
+      send(pid, {:nodedown, :test@nowhere})
+      Process.sleep(50)
+
+      state = :sys.get_state(pid)
+      assert state.role == :standby
+      GenServer.stop(pid)
+    end
+
+    test "unrelated info messages are ignored" do
+      {:ok, pid} = GenServer.start_link(Client, [])
+      send(pid, :unrelated_message)
+      Process.sleep(20)
+
+      assert Process.alive?(pid)
+      GenServer.stop(pid)
+    end
+
+    test ":ping with no socket is a no-op" do
+      {:ok, pid} = GenServer.start_link(Client, [])
+      send(pid, :ping)
+      Process.sleep(20)
+      state = :sys.get_state(pid)
+      assert state.socket == nil
+      GenServer.stop(pid)
+    end
+  end
+end
diff --git a/test/microwaveprop/rover/candidate_detail_test.exs b/test/microwaveprop/rover/candidate_detail_test.exs
new file mode 100644
index 00000000..4b995822
--- /dev/null
+++ b/test/microwaveprop/rover/candidate_detail_test.exs
@@ -0,0 +1,43 @@
+defmodule Microwaveprop.Rover.CandidateDetailTest do
+  use ExUnit.Case, async: true
+
+  alias Microwaveprop.Rover.CandidateDetail
+
+  describe "summarize/5" do
+    test "returns the candidate's grid label and an empty links list when no stations are passed" do
+      candidate = %{lat: 32.9, lon: -97.0}
+      result = CandidateDetail.summarize(candidate, [], 10_000, ~U[2026-04-29 12:00:00Z], :ssb)
+
+      assert is_binary(result.grid)
+      # 10-character grid for that point.
+      assert String.length(result.grid) == 10
+      assert result.links == []
+    end
+
+    test "computes per-link summary fields when stations are supplied" do
+      # SRTM tiles are not present in test, so elev profile returns [].
+      # `summarize/5` handles that gracefully and still returns a link.
+      candidate = %{lat: 32.9, lon: -97.0}
+
+      stations = [
+        %{callsign: "W5LUA", lat: 33.05, lon: -96.6},
+        %{callsign: "W5HN", lat: 32.7, lon: -97.4}
+      ]
+
+      result =
+        CandidateDetail.summarize(candidate, stations, 10_000, ~U[2026-04-29 12:00:00Z], :ssb)
+
+      assert length(result.links) == 2
+
+      Enum.each(result.links, fn link ->
+        assert is_binary(link.callsign)
+        assert is_float(link.distance_km)
+        assert is_binary(link.bearing)
+        assert is_float(link.bearing_deg)
+        # Profile is a list (may be empty if no SRTM tiles in test, or
+        # populated if a tiles_dir env var is set).
+        assert is_list(link.profile)
+      end)
+    end
+  end
+end
diff --git a/test/microwaveprop/weather/hrrr_native_client_test.exs b/test/microwaveprop/weather/hrrr_native_client_test.exs
index 3ed105f7..1f5031a1 100644
--- a/test/microwaveprop/weather/hrrr_native_client_test.exs
+++ b/test/microwaveprop/weather/hrrr_native_client_test.exs
@@ -553,6 +553,47 @@ defmodule Microwaveprop.Weather.HrrrNativeClientTest do
     end
   end
 
+  describe "fetch_native_duct_grid/4 with injected http_get" do
+    setup do
+      prev = Application.get_env(:microwaveprop, :hrrr_native_http_get)
+
+      on_exit(fn ->
+        if prev,
+          do: Application.put_env(:microwaveprop, :hrrr_native_http_get, prev),
+          else: Application.delete_env(:microwaveprop, :hrrr_native_http_get)
+      end)
+
+      :ok
+    end
+
+    @grid_spec %{
+      lon_start: -97.0,
+      lon_count: 2,
+      lon_step: 0.1,
+      lat_start: 32.7,
+      lat_count: 2,
+      lat_step: 0.1
+    }
+
+    test "propagates idx HTTP non-200 status as an error tuple" do
+      Application.put_env(:microwaveprop, :hrrr_native_http_get, fn _url, _opts ->
+        {:ok, %{status: 404, body: ""}}
+      end)
+
+      assert {:error, "HRRR native idx HTTP 404"} =
+               HrrrNativeClient.fetch_native_duct_grid(~D[2026-04-29], 12, @grid_spec)
+    end
+
+    test "propagates idx transport error" do
+      Application.put_env(:microwaveprop, :hrrr_native_http_get, fn _url, _opts ->
+        {:error, :timeout}
+      end)
+
+      assert {:error, :timeout} =
+               HrrrNativeClient.fetch_native_duct_grid(~D[2026-04-29], 12, @grid_spec)
+    end
+  end
+
   describe "duct_byte_ranges/1 boundary inputs" do
     test "empty idx entries yields an empty range list" do
       assert HrrrNativeClient.duct_byte_ranges([]) == []
diff --git a/test/microwaveprop_web/live/path_live_test.exs b/test/microwaveprop_web/live/path_live_test.exs
index 6d438fcc..d415f23b 100644
--- a/test/microwaveprop_web/live/path_live_test.exs
+++ b/test/microwaveprop_web/live/path_live_test.exs
@@ -417,6 +417,66 @@ defmodule MicrowavepropWeb.PathLiveTest do
     end
   end
 
+  describe "rover_path_id handle_params branch" do
+    test "non-existent UUID flashes error and pushes to /path", %{conn: conn} do
+      assert {:error, {:live_redirect, %{to: "/path"}}} =
+               live(conn, ~p"/path?rover_path_id=#{Ecto.UUID.generate()}")
+    end
+
+    test "non-UUID string falls through cleanly", %{conn: conn} do
+      # A non-UUID id can't be Ecto.UUID.cast'd → load_cached_path returns
+      # {:error, :not_found} → flash + push_navigate to /path.
+      assert {:error, {:live_redirect, %{to: "/path"}}} =
+               live(conn, ~p"/path?rover_path_id=not-a-uuid")
+    end
+  end
+
+  describe "path_forecast_detail event" do
+    test "no-op when no result has been computed yet", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/path")
+
+      # No result in assigns → fall through `else: _ -> {:noreply, socket}`.
+      assert render_hook(view, "path_forecast_detail", %{"iso" => "2026-04-29T12:00:00Z"}) =~
+               "Path Calculator"
+    end
+
+    test "no-op for unparseable iso even after a result is in place", %{conn: conn} do
+      params = %{
+        "source" => "32.9, -97.0",
+        "destination" => "33.5, -96.5",
+        "band" => "10000"
+      }
+
+      {:ok, view, _html} = live(conn, ~p"/path?#{params}")
+      # Let async compute_path finish.
+      _ = render(view)
+
+      # Garbage iso → falls into the `else` arm of the with-statement.
+      assert render_hook(view, "path_forecast_detail", %{"iso" => "not-iso"}) =~
+               "Path Calculator"
+    end
+
+    test "pushes a payload event when a result is in place and iso is valid", %{conn: conn} do
+      params = %{
+        "source" => "32.9, -97.0",
+        "destination" => "33.5, -96.5",
+        "band" => "10000"
+      }
+
+      {:ok, view, _html} = live(conn, ~p"/path?#{params}")
+      _ = render(view)
+
+      iso =
+        DateTime.utc_now()
+        |> DateTime.truncate(:second)
+        |> DateTime.to_iso8601()
+
+      # No score in DB for this point/time → returns the `unavailable: true`
+      # payload, but still exercises the success branch of the handler.
+      assert render_hook(view, "path_forecast_detail", %{"iso" => iso}) =~ "Path Calculator"
+    end
+  end
+
   describe "property: band round-trip in form" do
     property "for every configured band, submitting the form re-renders with that band selected" do
       # Re-stub the elevation client for each property iteration —
diff --git a/test/microwaveprop_web/live/rover_live_test.exs b/test/microwaveprop_web/live/rover_live_test.exs
index b22d0698..81b1d4a0 100644
--- a/test/microwaveprop_web/live/rover_live_test.exs
+++ b/test/microwaveprop_web/live/rover_live_test.exs
@@ -105,6 +105,47 @@ defmodule MicrowavepropWeb.RoverLiveTest do
     end
   end
 
+  describe "additional event handlers (anonymous)" do
+    test "toggle_only_good flips the filter assign without recomputing", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/rover")
+      render_hook(view, "toggle_only_good", %{})
+      # Page still renders.
+      assert render(view) =~ "Rover planning"
+    end
+
+    test "toggle_station flips a station's selected flag", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/rover")
+
+      # Anonymous mount uses "call:CALLSIGN" ids for default stations.
+      render_hook(view, "toggle_station", %{"id" => "call:W5LUA"})
+      assert render(view) =~ "Rover planning"
+    end
+
+    test "delete_station removes a station from anonymous list", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/rover")
+
+      render_hook(view, "delete_station", %{"id" => "call:W5LUA"})
+
+      html = render(view)
+      assert html =~ "W5HN"
+    end
+
+    test "close_candidate_detail clears the detail panel", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/rover")
+
+      render_hook(view, "close_candidate_detail", %{})
+      assert render(view) =~ "Rover planning"
+    end
+
+    test "update_station_grid edits a station's grid in the anonymous list", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/rover")
+
+      render_hook(view, "update_station_grid", %{"station_id" => "call:W5LUA", "grid" => "EM13xx"})
+      # No crash; page still renders.
+      assert render(view) =~ "Rover planning"
+    end
+  end
+
   describe "logged-in mount" do
     setup :register_and_log_in_user
 
@@ -139,6 +180,58 @@ defmodule MicrowavepropWeb.RoverLiveTest do
       assert Enum.any?(Rover.list_stations(user), &(&1.callsign == "K5TX"))
     end
 
+    test "delete_station removes a persisted station for the logged-in user", %{conn: conn, user: user} do
+      {:ok, view, _html} = live(conn, ~p"/rover")
+
+      [first | _] = Rover.list_stations(user)
+      render_hook(view, "delete_station", %{"id" => to_string(first.id)})
+
+      assert length(Rover.list_stations(user)) == 2
+    end
+
+    test "toggle_station flips the persisted selected flag", %{conn: conn, user: user} do
+      {:ok, view, _html} = live(conn, ~p"/rover")
+
+      [first | _] = Rover.list_stations(user)
+      render_hook(view, "toggle_station", %{"id" => to_string(first.id)})
+
+      reloaded = Repo.reload(first)
+      assert reloaded.selected != first.selected
+    end
+
+    test "update_station_grid updates the grid for a persisted station", %{conn: conn, user: user} do
+      {:ok, view, _html} = live(conn, ~p"/rover")
+
+      [first | _] = Rover.list_stations(user)
+      render_hook(view, "update_station_grid", %{"station_id" => to_string(first.id), "grid" => "EM12kp"})
+
+      reloaded = Repo.reload(first)
+      assert String.upcase(reloaded.grid) == "EM12KP"
+    end
+
+    test "update_station_grid surfaces error for invalid grid input", %{conn: conn, user: user} do
+      {:ok, view, _html} = live(conn, ~p"/rover")
+
+      [first | _] = Rover.list_stations(user)
+
+      html =
+        render_hook(view, "update_station_grid", %{"station_id" => to_string(first.id), "grid" => "ZZZ99"})
+
+      assert html =~ "invalid grid"
+    end
+
+    test "update_station_grid is a no-op for blank input", %{conn: conn, user: user} do
+      {:ok, view, _html} = live(conn, ~p"/rover")
+
+      [first | _] = Rover.list_stations(user)
+      original_grid = first.grid
+
+      render_hook(view, "update_station_grid", %{"station_id" => to_string(first.id), "grid" => ""})
+
+      reloaded = Repo.reload(first)
+      assert reloaded.grid == original_grid
+    end
+
     test "set_home_qth persists the user's home QTH", %{conn: conn, user: user} do
       {:ok, view, _html} = live(conn, ~p"/rover")
 
diff --git a/test/microwaveprop_web/live/rover_planning_live/path_show_test.exs b/test/microwaveprop_web/live/rover_planning_live/path_show_test.exs
new file mode 100644
index 00000000..e059cef3
--- /dev/null
+++ b/test/microwaveprop_web/live/rover_planning_live/path_show_test.exs
@@ -0,0 +1,95 @@
+defmodule MicrowavepropWeb.RoverPlanningLive.PathShowTest do
+  use MicrowavepropWeb.ConnCase, async: true
+
+  import Ecto.Query
+  import Phoenix.LiveViewTest
+
+  alias Microwaveprop.AccountsFixtures
+  alias Microwaveprop.Repo
+  alias Microwaveprop.Rover
+  alias Microwaveprop.RoverPlanning
+  alias Microwaveprop.RoverPlanning.Path, as: RoverPath
+  alias Microwaveprop.Terrain.ElevationClient
+
+  setup do
+    Req.Test.stub(ElevationClient, fn conn ->
+      params = Plug.Conn.fetch_query_params(conn).query_params
+      lat_count = params["latitude"] |> String.split(",") |> length()
+      Req.Test.json(conn, %{"elevation" => List.duplicate(200.0, lat_count)})
+    end)
+
+    :ok
+  end
+
+  defp create_mission(user) do
+    {:ok, _} = Rover.create_location(user, %{lat: 32.0, lon: -97.0, status: :good})
+
+    {:ok, mission} =
+      RoverPlanning.create_mission(user, %{
+        "name" => "Test mission",
+        "band_mhz" => 10_000,
+        "only_known_good" => true,
+        "rover_height_ft" => 8.0,
+        "station_height_ft" => 30.0,
+        "stations" => %{"0" => %{"input" => "EM12kp", "position" => 0}}
+      })
+
+    mission
+  end
+
+  describe "mount" do
+    test "redirects to mission show with flash when path is not found", %{conn: conn} do
+      user = AccountsFixtures.user_fixture()
+      conn = log_in_user(conn, user)
+      mission = create_mission(user)
+
+      assert {:error, {:live_redirect, %{to: redirect_to, flash: flash}}} =
+               live(conn, ~p"/rover-planning/#{mission.id}/paths/#{Ecto.UUID.generate()}")
+
+      assert redirect_to == "/rover-planning/#{mission.id}"
+      assert flash["error"] =~ "not found"
+    end
+
+    test "renders the path detail page when given a valid path id", %{conn: conn} do
+      user = AccountsFixtures.user_fixture()
+      conn = log_in_user(conn, user)
+      mission = create_mission(user)
+
+      [first_path | _] =
+        Repo.all(from(p in RoverPath, where: p.mission_id == ^mission.id))
+
+      # Populate result so the page renders the body.
+      result_payload = %{
+        "verdict" => "CLEAR",
+        "distance_km" => 25.5,
+        "path_points" => [
+          %{"dist_km" => 0.0, "elev" => 200, "beam" => 200, "r1" => 0},
+          %{"dist_km" => 12.5, "elev" => 220, "beam" => 220, "r1" => 5},
+          %{"dist_km" => 25.5, "elev" => 240, "beam" => 240, "r1" => 0}
+        ],
+        "verdict_label" => "CLEAR"
+      }
+
+      {:ok, path} =
+        first_path
+        |> RoverPath.changeset(%{result: result_payload, status: :complete})
+        |> Repo.update()
+
+      {:ok, _lv, html} = live(conn, ~p"/rover-planning/#{mission.id}/paths/#{path.id}")
+      assert html =~ "Test mission"
+    end
+
+    test "redirects when mission_id is not a UUID", %{conn: conn} do
+      user = AccountsFixtures.user_fixture()
+      conn = log_in_user(conn, user)
+      mission = create_mission(user)
+
+      assert {:error, {:live_redirect, %{to: redirect_to}}} =
+               live(conn, ~p"/rover-planning/not-uuid/paths/#{Ecto.UUID.generate()}")
+
+      # When mission_id can't be cast, push_navigate goes to /rover-planning/<input>.
+      assert redirect_to =~ "rover-planning"
+      _ = mission
+    end
+  end
+end
diff --git a/test/microwaveprop_web/live/skewt_live_test.exs b/test/microwaveprop_web/live/skewt_live_test.exs
index 01a84b80..efafbd30 100644
--- a/test/microwaveprop_web/live/skewt_live_test.exs
+++ b/test/microwaveprop_web/live/skewt_live_test.exs
@@ -3,6 +3,81 @@ defmodule MicrowavepropWeb.SkewtLiveTest do
 
   import Phoenix.LiveViewTest
 
+  alias Microwaveprop.Weather.HrrrProfile
+
+  describe "with HRRR profile data near the queried location" do
+    setup do
+      profile_data = [
+        %{"pres" => 1000.0, "hght" => 110, "tmpc" => 25.0, "dwpc" => 18.0},
+        %{"pres" => 925.0, "hght" => 770, "tmpc" => 18.0, "dwpc" => 12.0},
+        %{"pres" => 850.0, "hght" => 1500, "tmpc" => 14.0, "dwpc" => 8.0},
+        %{"pres" => 700.0, "hght" => 3000, "tmpc" => 0.0, "dwpc" => -10.0},
+        %{"pres" => 500.0, "hght" => 5500, "tmpc" => -20.0, "dwpc" => -30.0}
+      ]
+
+      # Insert near EM12kp (32.646, -97.125)
+      now = DateTime.truncate(DateTime.utc_now(), :second)
+
+      %HrrrProfile{}
+      |> HrrrProfile.changeset(%{
+        valid_time: now,
+        run_time: now,
+        lat: 32.65,
+        lon: -97.12,
+        profile: profile_data,
+        hpbl_m: 1500.0,
+        pwat_mm: 25.0,
+        surface_temp_c: 25.0,
+        surface_dewpoint_c: 18.0,
+        surface_pressure_mb: 1013.0,
+        surface_refractivity: 320.5,
+        min_refractivity_gradient: -45.0,
+        ducting_detected: false
+      })
+      |> Microwaveprop.Repo.insert!()
+
+      :ok
+    end
+
+    test "renders the time selector when valid_times list is non-empty", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/skewt?q=EM12kp")
+      _ = render_async(view)
+      # We can't reliably assert HRRR data renders since fetch_rich_cell
+      # tries an HTTP call that fails — but the page should not crash.
+      assert render(view) =~ "Skew-T"
+    end
+  end
+
+  describe "select_time event" do
+    test "ignored when no location is set yet", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/skewt")
+
+      # No location resolved → select_time falls through to the no-op.
+      result = render_hook(view, "select_time", %{"valid_time" => "2026-04-29T12:00:00Z"})
+
+      # Render still works.
+      assert result =~ "Skew-T"
+    end
+
+    test "ignored when valid_time is unparseable", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/skewt?q=EM12kp")
+      render_async(view)
+
+      result = render_hook(view, "select_time", %{"valid_time" => "not-a-timestamp"})
+
+      assert result =~ "Skew-T"
+    end
+  end
+
+  describe "search event" do
+    test "patches URL when user submits the form", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/skewt")
+
+      render_hook(view, "search", %{"q" => "EM13"})
+      assert render_async(view) =~ "EM13"
+    end
+  end
+
   describe "GET /skewt" do
     test "renders search bar with no results when no query is supplied", %{conn: conn} do
       {:ok, _view, html} = live(conn, ~p"/skewt")
diff --git a/test/microwaveprop_web/live/skewt_location_resolver_test.exs b/test/microwaveprop_web/live/skewt_location_resolver_test.exs
index 401a287d..4498cfe4 100644
--- a/test/microwaveprop_web/live/skewt_location_resolver_test.exs
+++ b/test/microwaveprop_web/live/skewt_location_resolver_test.exs
@@ -1,6 +1,7 @@
 defmodule MicrowavepropWeb.SkewtLocationResolverTest do
   use Microwaveprop.DataCase, async: false
 
+  alias Microwaveprop.CallsignLocation.Location
   alias MicrowavepropWeb.SkewtLocationResolver
 
   describe "classify/1" do
@@ -29,6 +30,36 @@ defmodule MicrowavepropWeb.SkewtLocationResolverTest do
     end
   end
 
+  describe "resolve/1 — callsign branch" do
+    test "resolves a cached callsign via CallsignLocation lookup" do
+      # Seed the cache so the resolver doesn't hit QRZ.
+      %Location{}
+      |> Location.changeset(%{
+        callsign: "W5ISP",
+        latitude: 33.0,
+        longitude: -97.0,
+        gridsquare: "EM13QC"
+      })
+      |> Microwaveprop.Repo.insert!()
+
+      assert {:ok, resolved} = SkewtLocationResolver.resolve("W5ISP")
+      assert resolved.source == :callsign
+      assert resolved.lat == 33.0
+      assert resolved.lon == -97.0
+      assert resolved.label =~ "W5ISP"
+    end
+
+    test "surfaces the lookup error message for an unknown callsign" do
+      # No cached row + a QRZ stub that 404s.
+      Req.Test.stub(Microwaveprop.Qrz.Client, fn conn ->
+        Plug.Conn.send_resp(conn, 404, "Not Found")
+      end)
+
+      assert {:error, msg} = SkewtLocationResolver.resolve("XX9XYZ")
+      assert msg =~ "callsign lookup failed"
+    end
+  end
+
   describe "resolve/1 — grid square branch" do
     test "returns lat/lon for a valid grid square" do
       assert {:ok, %{lat: lat, lon: lon, label: "EM12KP", source: :grid}} =
diff --git a/test/mix/tasks/weather_rebatch_asos_test.exs b/test/mix/tasks/weather_rebatch_asos_test.exs
index 0c4625de..53c8f3fa 100644
--- a/test/mix/tasks/weather_rebatch_asos_test.exs
+++ b/test/mix/tasks/weather_rebatch_asos_test.exs
@@ -86,4 +86,24 @@ defmodule Mix.Tasks.Weather.RebatchAsosTest do
     output = ExUnit.CaptureIO.capture_io(fn -> RebatchAsos.run([]) end)
     assert output =~ "Nothing to do"
   end
+
+  describe "Mix task wrapper" do
+    test "run/1 with no args is a no-op" do
+      output =
+        ExUnit.CaptureIO.capture_io(fn ->
+          assert :ok = Mix.Tasks.Weather.RebatchAsos.run([])
+        end)
+
+      assert output =~ "Nothing to do"
+    end
+
+    test "run/1 with --dry-run flag" do
+      output =
+        ExUnit.CaptureIO.capture_io(fn ->
+          assert :ok = Mix.Tasks.Weather.RebatchAsos.run(["--dry-run"])
+        end)
+
+      assert output =~ "Nothing to do"
+    end
+  end
 end