diff --git a/test/towerops/uisp/config_snapshot_test.exs b/test/towerops/uisp/config_snapshot_test.exs
index cc95b6f2..7b6a7102 100644
--- a/test/towerops/uisp/config_snapshot_test.exs
+++ b/test/towerops/uisp/config_snapshot_test.exs
@@ -2,6 +2,7 @@ defmodule Towerops.Uisp.ConfigSnapshotTest do
   use Towerops.DataCase, async: true
   use ExUnitProperties
 
+  alias Towerops.Uisp.Client
   alias Towerops.Uisp.ConfigSnapshot
 
   describe "compute_diff/2" do
@@ -200,6 +201,71 @@ defmodule Towerops.Uisp.ConfigSnapshotTest do
     end
   end
 
+  describe "sync_configs/2" do
+    setup do
+      user = Towerops.AccountsFixtures.user_fixture()
+      org = Towerops.OrganizationsFixtures.organization_fixture(user.id)
+
+      {:ok, site} =
+        Towerops.Sites.create_site(%{
+          name: "S-sync #{System.unique_integer([:positive])}",
+          organization_id: org.id
+        })
+
+      device =
+        Towerops.DevicesFixtures.device_fixture(%{
+          organization_id: org.id,
+          site_id: site.id,
+          name: "uisp-#{System.unique_integer([:positive])}"
+        })
+
+      integration = %{
+        credentials: %{
+          "url" => "http://uisp.example.com",
+          "api_key" => "test-key"
+        }
+      }
+
+      %{integration: integration, device: device}
+    end
+
+    test "stores configs and counts stored vs unchanged", %{
+      integration: integration,
+      device: device
+    } do
+      counter = :counters.new(1, [:atomics])
+
+      Req.Test.stub(Client, fn conn ->
+        :counters.add(counter, 1, 1)
+        # Each request returns a different config so first store, second unchanged
+        Req.Test.json(conn, %{"id" => "uisp-1", "name" => "AP", "version" => 1})
+      end)
+
+      device_map = %{"uisp-1" => device}
+
+      assert {:ok, %{stored: 1, unchanged: 0}} =
+               ConfigSnapshot.sync_configs(integration, device_map)
+
+      # Same config — should be unchanged
+      assert {:ok, %{stored: 0, unchanged: 1}} =
+               ConfigSnapshot.sync_configs(integration, device_map)
+    end
+
+    test "skips devices when fetch_device_config errors", %{
+      integration: integration,
+      device: device
+    } do
+      Req.Test.stub(Client, fn conn ->
+        Req.Test.transport_error(conn, :econnrefused)
+      end)
+
+      device_map = %{"uisp-1" => device}
+
+      assert {:ok, %{stored: 0, unchanged: 0}} =
+               ConfigSnapshot.sync_configs(integration, device_map)
+    end
+  end
+
   describe "diff_snapshots/2" do
     setup do
       user = Towerops.AccountsFixtures.user_fixture()