diff --git a/test/microwaveprop/radio/edit_notifier_test.exs b/test/microwaveprop/radio/edit_notifier_test.exs
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+++ b/test/microwaveprop/radio/edit_notifier_test.exs
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+defmodule Microwaveprop.Radio.EditNotifierTest do
+  @moduledoc """
+  Characterization tests for the edit-review email notifier.
+
+  These pin down the current behavior of `deliver_edit_approved/1` and
+  `deliver_edit_rejected/1` so future refactors get a compile-in safety net.
+  """
+  use Microwaveprop.DataCase, async: true
+
+  import Swoosh.TestAssertions
+
+  alias Microwaveprop.Accounts
+  alias Microwaveprop.Radio.Contact
+  alias Microwaveprop.Radio.ContactEdit
+  alias Microwaveprop.Radio.EditNotifier
+
+  @contact_attrs %{
+    station1: "W5ISP",
+    station2: "K5TR",
+    qso_timestamp: ~U[2026-04-01 14:30:00Z],
+    grid1: "EM13",
+    grid2: "EL29",
+    pos1: %{"lat" => 33.5, "lon" => -97.0},
+    pos2: %{"lat" => 29.5, "lon" => -98.5},
+    mode: "CW",
+    band: Decimal.new("10000"),
+    distance_km: Decimal.new("450")
+  }
+
+  @user_attrs %{
+    callsign: "W5TEST",
+    name: "Test User",
+    email: "test@example.com",
+    password: "testpassword123"
+  }
+
+  defp insert_contact(attrs \\ %{}) do
+    {:ok, contact} =
+      %Contact{}
+      |> Contact.changeset(Map.merge(@contact_attrs, attrs))
+      |> Repo.insert()
+
+    contact
+  end
+
+  defp insert_user(attrs \\ %{}) do
+    {:ok, user} = Accounts.register_user(Map.merge(@user_attrs, attrs))
+    user
+  end
+
+  defp insert_edit(contact, user, attrs \\ %{}) do
+    defaults = %{
+      contact_id: contact.id,
+      user_id: user.id,
+      proposed_changes: %{"grid1" => "EM13kk"}
+    }
+
+    {:ok, edit} =
+      %ContactEdit{}
+      |> ContactEdit.changeset(Map.merge(defaults, attrs))
+      |> Repo.insert()
+
+    # apply anything the review_changeset path wouldn't (admin_note, etc.)
+    extras =
+      attrs
+      |> Map.drop([:contact_id, :user_id, :proposed_changes])
+      |> Map.to_list()
+
+    if extras == [] do
+      edit
+    else
+      edit |> Ecto.Changeset.change(extras) |> Repo.update!()
+    end
+  end
+
+  describe "deliver_edit_approved/1" do
+    test "sends a single email to the submitter from the configured defaults" do
+      contact = insert_contact()
+      user = insert_user()
+      edit = insert_edit(contact, user, %{admin_note: "Looks right, thanks"})
+
+      assert {:ok, %Swoosh.Email{}} = EditNotifier.deliver_edit_approved(edit)
+
+      assert_email_sent(fn email ->
+        assert email.to == [{"", "test@example.com"}]
+        assert email.from == {"NTMS Propagation", "prop@w5isp.com"}
+        assert email.reply_to == {"", "graham@mcintire.me"}
+        assert email.subject == "Your contact edit was approved"
+      end)
+    end
+
+    test "body addresses the submitter by callsign and names APPROVED" do
+      contact = insert_contact()
+      user = insert_user(%{callsign: "K5ABC", email: "k5abc@example.com"})
+      edit = insert_edit(contact, user)
+
+      {:ok, email} = EditNotifier.deliver_edit_approved(edit)
+
+      assert email.text_body =~ "Hi K5ABC,"
+      assert email.text_body =~ "APPROVED"
+      refute email.text_body =~ "REJECTED"
+    end
+
+    test "body lists the contact endpoints, band, and qso_timestamp" do
+      contact = insert_contact()
+      user = insert_user()
+      edit = insert_edit(contact, user)
+
+      {:ok, email} = EditNotifier.deliver_edit_approved(edit)
+
+      assert email.text_body =~ "W5ISP <-> K5TR"
+      assert email.text_body =~ "10 GHz"
+      assert email.text_body =~ "2026-04-01 14:30 UTC"
+    end
+
+    test "formats sub-GHz bands in MHz" do
+      contact = insert_contact(%{band: Decimal.new("432")})
+      user = insert_user()
+      edit = insert_edit(contact, user)
+
+      {:ok, email} = EditNotifier.deliver_edit_approved(edit)
+
+      assert email.text_body =~ "432 MHz"
+      refute email.text_body =~ "GHz"
+    end
+
+    test "body lists each proposed change on its own line" do
+      contact = insert_contact()
+      user = insert_user()
+
+      edit =
+        insert_edit(contact, user, %{
+          proposed_changes: %{"grid1" => "EM13kk", "mode" => "SSB"}
+        })
+
+      {:ok, email} = EditNotifier.deliver_edit_approved(edit)
+
+      assert email.text_body =~ "  - grid1: EM13kk"
+      assert email.text_body =~ "  - mode: SSB"
+    end
+
+    test "includes an admin note when present" do
+      contact = insert_contact()
+      user = insert_user()
+      edit = insert_edit(contact, user, %{admin_note: "Verified against QRZ"})
+
+      {:ok, email} = EditNotifier.deliver_edit_approved(edit)
+
+      assert email.text_body =~ "Admin note: Verified against QRZ"
+    end
+
+    test "omits the admin-note line when note is nil" do
+      contact = insert_contact()
+      user = insert_user()
+      edit = insert_edit(contact, user, %{admin_note: nil})
+
+      {:ok, email} = EditNotifier.deliver_edit_approved(edit)
+
+      refute email.text_body =~ "Admin note:"
+    end
+
+    test "omits the admin-note line when note is empty string" do
+      contact = insert_contact()
+      user = insert_user()
+      edit = insert_edit(contact, user, %{admin_note: ""})
+
+      {:ok, email} = EditNotifier.deliver_edit_approved(edit)
+
+      refute email.text_body =~ "Admin note:"
+    end
+
+    test "includes a contact view link built from the endpoint url" do
+      contact = insert_contact()
+      user = insert_user()
+      edit = insert_edit(contact, user)
+
+      {:ok, email} = EditNotifier.deliver_edit_approved(edit)
+
+      assert email.text_body =~ "#{MicrowavepropWeb.Endpoint.url()}/contacts/#{contact.id}"
+    end
+
+    test "preloads associations if the caller passes a bare record" do
+      contact = insert_contact()
+      user = insert_user()
+      edit = insert_edit(contact, user)
+
+      # Pass the schema back after re-fetch without preloads — the notifier
+      # must tolerate that and still resolve user.callsign / contact.station1.
+      bare = Repo.get!(ContactEdit, edit.id)
+
+      assert {:ok, email} = EditNotifier.deliver_edit_approved(bare)
+      assert email.text_body =~ "Hi W5TEST,"
+      assert email.text_body =~ "W5ISP <-> K5TR"
+    end
+  end
+
+  describe "deliver_edit_rejected/1" do
+    test "sends an email with the rejected subject to the submitter" do
+      contact = insert_contact()
+      user = insert_user()
+      edit = insert_edit(contact, user)
+
+      assert {:ok, %Swoosh.Email{}} = EditNotifier.deliver_edit_rejected(edit)
+
+      assert_email_sent(fn email ->
+        assert email.to == [{"", "test@example.com"}]
+        assert email.from == {"NTMS Propagation", "prop@w5isp.com"}
+        assert email.reply_to == {"", "graham@mcintire.me"}
+        assert email.subject == "Your contact edit was rejected"
+      end)
+    end
+
+    test "body says REJECTED and labels the changes as 'Proposed changes:'" do
+      contact = insert_contact()
+      user = insert_user()
+
+      edit =
+        insert_edit(contact, user, %{
+          proposed_changes: %{"station2" => "W5XYZ"},
+          admin_note: "Mismatch with log"
+        })
+
+      {:ok, email} = EditNotifier.deliver_edit_rejected(edit)
+
+      assert email.text_body =~ "REJECTED"
+      refute email.text_body =~ "APPROVED"
+      assert email.text_body =~ "Proposed changes:\n  - station2: W5XYZ"
+      assert email.text_body =~ "Admin note: Mismatch with log"
+    end
+
+    test "includes the contact view link for rejected edits too" do
+      contact = insert_contact()
+      user = insert_user()
+      edit = insert_edit(contact, user)
+
+      {:ok, email} = EditNotifier.deliver_edit_rejected(edit)
+
+      assert email.text_body =~ "#{MicrowavepropWeb.Endpoint.url()}/contacts/#{contact.id}"
+    end
+  end
+end