diff --git a/homeassistant/components/backup/__init__.py b/homeassistant/components/backup/__init__.py
index a7cceee05cd..0b89633dd53 100644
--- a/homeassistant/components/backup/__init__.py
+++ b/homeassistant/components/backup/__init__.py
@@ -11,11 +11,12 @@ from homeassistant.helpers.typing import ConfigType
 from .agent import BackupAgent, BackupAgentPlatformProtocol, UploadedBackup
 from .const import DOMAIN, LOGGER
 from .http import async_register_http_views
-from .manager import BackupManager, BackupPlatformProtocol
+from .manager import Backup, BackupManager, BackupPlatformProtocol
 from .models import BackupUploadMetadata, BaseBackup
 from .websocket import async_register_websocket_handlers
 
 __all__ = [
+    "Backup",
     "BackupAgent",
     "BackupAgentPlatformProtocol",
     "BackupPlatformProtocol",
diff --git a/homeassistant/components/kitchen_sink/backup.py b/homeassistant/components/kitchen_sink/backup.py
index 35c646845a3..f3203781488 100644
--- a/homeassistant/components/kitchen_sink/backup.py
+++ b/homeassistant/components/kitchen_sink/backup.py
@@ -17,7 +17,7 @@ from homeassistant.core import HomeAssistant
 LOGGER = logging.getLogger(__name__)
 
 
-async def async_get_backup_sync_agents(
+async def async_get_backup_agents(
     hass: HomeAssistant,
 ) -> list[BackupAgent]:
     """Register the backup agents."""
diff --git a/tests/components/kitchen_sink/test_backup.py b/tests/components/kitchen_sink/test_backup.py
new file mode 100644
index 00000000000..1866a1e2e19
--- /dev/null
+++ b/tests/components/kitchen_sink/test_backup.py
@@ -0,0 +1,162 @@
+"""Test the Kitchen Sink backup platform."""
+
+from collections.abc import AsyncGenerator
+from pathlib import Path
+from unittest.mock import patch
+from uuid import UUID
+
+import pytest
+
+from homeassistant.components.backup import DOMAIN as BACKUP_DOMAIN, Backup
+from homeassistant.components.kitchen_sink import DOMAIN
+from homeassistant.core import HomeAssistant
+from homeassistant.setup import async_setup_component
+
+from tests.typing import WebSocketGenerator
+
+
+@pytest.fixture(autouse=True)
+async def backup_only() -> AsyncGenerator[None]:
+    """Enable only the backup platform.
+
+    The backup platform is not an entity platform.
+    """
+    with patch(
+        "homeassistant.components.kitchen_sink.COMPONENTS_WITH_DEMO_PLATFORM",
+        [],
+    ):
+        yield
+
+
+@pytest.fixture(autouse=True)
+async def setup_integration(hass: HomeAssistant) -> AsyncGenerator[None]:
+    """Set up Kitchen Sink integration."""
+    with patch("homeassistant.components.backup.is_hassio", return_value=True):
+        assert await async_setup_component(hass, BACKUP_DOMAIN, {BACKUP_DOMAIN: {}})
+        assert await async_setup_component(hass, DOMAIN, {DOMAIN: {}})
+        await hass.async_block_till_done()
+        yield
+
+
+async def test_agents_info(
+    hass: HomeAssistant,
+    hass_ws_client: WebSocketGenerator,
+) -> None:
+    """Test backup agents info."""
+    client = await hass_ws_client(hass)
+
+    await client.send_json_auto_id({"type": "backup/agents/info"})
+    response = await client.receive_json()
+
+    assert response["success"]
+    assert response["result"] == {
+        "agents": [{"agent_id": "kitchen_sink.syncer"}],
+        "syncing": False,
+    }
+
+
+async def test_agents_list_backups(
+    hass: HomeAssistant,
+    hass_ws_client: WebSocketGenerator,
+) -> None:
+    """Test backup agents list backups."""
+    client = await hass_ws_client(hass)
+
+    await client.send_json_auto_id({"type": "backup/agents/list_backups"})
+    response = await client.receive_json()
+
+    assert response["success"]
+    assert response["result"] == [
+        {
+            "agent_id": "kitchen_sink.syncer",
+            "date": "1970-01-01T00:00:00Z",
+            "id": "def456",
+            "slug": "abc123",
+            "size": 1234,
+            "name": "Kitchen sink syncer",
+            "protected": False,
+        }
+    ]
+
+
+async def test_agents_download(
+    hass: HomeAssistant,
+    hass_ws_client: WebSocketGenerator,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test backup agents download."""
+    client = await hass_ws_client(hass)
+    backup_id = "def456"
+    slug = "abc123"
+
+    await client.send_json_auto_id(
+        {
+            "type": "backup/agents/download",
+            "slug": slug,
+            "agent_id": "kitchen_sink.syncer",
+            "backup_id": backup_id,
+        }
+    )
+    response = await client.receive_json()
+
+    assert response["success"]
+    path = hass.config.path(f"backup/{slug}.tar")
+    assert f"Downloading backup {backup_id} to {path}" in caplog.text
+
+
+async def test_agents_upload(
+    hass: HomeAssistant,
+    hass_ws_client: WebSocketGenerator,
+    caplog: pytest.LogCaptureFixture,
+    hass_supervisor_access_token: str,
+) -> None:
+    """Test backup agents upload."""
+    client = await hass_ws_client(hass, hass_supervisor_access_token)
+    slug = "test-backup"
+    test_backup = Backup(
+        slug=slug,
+        name="Test",
+        date="1970-01-01T00:00:00.000Z",
+        path=Path(hass.config.path(f"backups/{slug}.tar")),
+        size=0.0,
+        protected=False,
+    )
+    uuid = UUID(int=123456)
+
+    with (
+        patch("homeassistant.components.kitchen_sink.backup.uuid4", return_value=uuid),
+        patch(
+            "homeassistant.components.backup.manager.BackupManager.async_get_backup",
+        ) as fetch_backup,
+    ):
+        fetch_backup.return_value = test_backup
+        await client.send_json_auto_id(
+            {
+                "type": "backup/upload",
+                "data": {
+                    "slug": slug,
+                },
+            }
+        )
+        response = await client.receive_json()
+
+    assert response["success"]
+    backup_name = f"{slug}.tar"
+    assert f"Uploading backup {backup_name}" in caplog.text
+
+    with patch("homeassistant.components.kitchen_sink.backup.uuid4", return_value=uuid):
+        await client.send_json_auto_id({"type": "backup/agents/list_backups"})
+        response = await client.receive_json()
+
+    assert response["success"]
+    backup_list = response["result"]
+    assert len(backup_list) == 2
+    assert backup_list[1] == {
+        "agent_id": "kitchen_sink.syncer",
+        "date": test_backup.date,
+        "id": uuid.hex,
+        "slug": slug,
+        "size": 0.0,
+        "name": test_backup.name,
+        "protected": test_backup.protected,
+    }