diff --git a/test/towerops_web/live/org/integrations_live_test.exs b/test/towerops_web/live/org/integrations_live_test.exs
index 1c0b084d..b00c36a1 100644
--- a/test/towerops_web/live/org/integrations_live_test.exs
+++ b/test/towerops_web/live/org/integrations_live_test.exs
@@ -463,6 +463,125 @@ defmodule ToweropsWeb.Org.IntegrationsLiveTest do
       assert html =~ "Infrastructure"
     end
 
+    test "renders next_sync_minutes and humanize_interval for integration with last_synced_at",
+         %{conn: conn, user: user, organization: org} do
+      now = DateTime.truncate(DateTime.utc_now(), :second)
+
+      {:ok, _} =
+        Towerops.Integrations.create_integration(org.id, %{
+          provider: "preseem",
+          enabled: true,
+          credentials: %{"api_key" => "k"},
+          last_sync_status: "success",
+          last_synced_at: now,
+          sync_interval_minutes: 90
+        })
+
+      {:ok, _view, html} =
+        conn
+        |> log_in_user(user)
+        |> live(~p"/orgs/#{org.slug}/settings/integrations")
+
+      # humanize_interval(90) -> "1h 30min"
+      assert html =~ "1h 30min"
+      # Next sync should appear
+      assert html =~ "Next in" or html =~ "Syncs every"
+    end
+
+    test "renders humanize_interval at exact hour boundary",
+         %{conn: conn, user: user, organization: org} do
+      {:ok, _} =
+        Towerops.Integrations.create_integration(org.id, %{
+          provider: "preseem",
+          enabled: true,
+          credentials: %{"api_key" => "k"},
+          last_sync_status: "success",
+          last_synced_at: DateTime.truncate(DateTime.utc_now(), :second),
+          sync_interval_minutes: 120
+        })
+
+      {:ok, _view, html} =
+        conn
+        |> log_in_user(user)
+        |> live(~p"/orgs/#{org.slug}/settings/integrations")
+
+      # humanize_interval(120) -> "2h"
+      assert html =~ "2h"
+    end
+
+    test "renders humanize_interval below hour", %{conn: conn, user: user, organization: org} do
+      {:ok, _} =
+        Towerops.Integrations.create_integration(org.id, %{
+          provider: "preseem",
+          enabled: true,
+          credentials: %{"api_key" => "k"},
+          last_sync_status: "success",
+          last_synced_at: DateTime.truncate(DateTime.utc_now(), :second),
+          sync_interval_minutes: 30
+        })
+
+      {:ok, _view, html} =
+        conn
+        |> log_in_user(user)
+        |> live(~p"/orgs/#{org.slug}/settings/integrations")
+
+      assert html =~ "30min"
+    end
+
+    test "test_connection without filling required fields shows error for cn_maestro",
+         %{conn: conn, user: user, organization: org} do
+      {:ok, view, _html} =
+        conn
+        |> log_in_user(user)
+        |> live(~p"/orgs/#{org.slug}/settings/integrations")
+
+      view |> element("#configure-cn_maestro") |> render_click()
+
+      html = render_hook(view, "test_connection", %{})
+      assert html =~ "Please fill in all required fields first"
+    end
+
+    test "test_connection without filling required fields shows error for uisp",
+         %{conn: conn, user: user, organization: org} do
+      {:ok, view, _html} =
+        conn
+        |> log_in_user(user)
+        |> live(~p"/orgs/#{org.slug}/settings/integrations")
+
+      view |> element("#configure-uisp") |> render_click()
+
+      html = render_hook(view, "test_connection", %{})
+      assert html =~ "Please fill in all required fields first"
+    end
+
+    test "toggle_enabled is rejected when an exclusive integration is already active",
+         %{conn: conn, user: user, organization: org} do
+      # Sonar (billing exclusive) is enabled
+      {:ok, _sonar} =
+        Towerops.Integrations.create_integration(org.id, %{
+          provider: "sonar",
+          enabled: true,
+          credentials: %{"instance_url" => "https://x", "api_token" => "t"}
+        })
+
+      # Splynx (also billing exclusive) is disabled
+      {:ok, _splynx} =
+        Towerops.Integrations.create_integration(org.id, %{
+          provider: "splynx",
+          enabled: false,
+          credentials: %{"instance_url" => "https://y", "api_key" => "k", "api_secret" => "s"}
+        })
+
+      {:ok, view, _html} =
+        conn
+        |> log_in_user(user)
+        |> live(~p"/orgs/#{org.slug}/settings/integrations")
+
+      html = render_hook(view, "toggle_enabled", %{"provider" => "splynx"})
+      # Should hit the exclusive_conflict? branch
+      assert html =~ "Only one" or html =~ "Disable"
+    end
+
     test "clears sync status when credentials change", %{conn: conn, user: user, organization: org} do
       {:ok, _} =
         Towerops.Integrations.create_integration(org.id, %{