diff --git a/homeassistant/components/litterrobot/__init__.py b/homeassistant/components/litterrobot/__init__.py
index c7eda2f118b..daf71fe8a6e 100644
--- a/homeassistant/components/litterrobot/__init__.py
+++ b/homeassistant/components/litterrobot/__init__.py
@@ -6,6 +6,7 @@ from pylitterbot import FeederRobot, LitterRobot, LitterRobot3, LitterRobot4, Ro
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
+from homeassistant.helpers.device_registry import DeviceEntry
 
 from .const import DOMAIN
 from .hub import LitterRobotHub
@@ -58,3 +59,17 @@ async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
         hass.data[DOMAIN].pop(entry.entry_id)
 
     return unload_ok
+
+
+async def async_remove_config_entry_device(
+    hass: HomeAssistant, config_entry: ConfigEntry, device_entry: DeviceEntry
+) -> bool:
+    """Remove a config entry from a device."""
+    hub: LitterRobotHub = hass.data[DOMAIN][config_entry.entry_id]
+    return not any(
+        identifier
+        for identifier in device_entry.identifiers
+        if identifier[0] == DOMAIN
+        for robot in hub.account.robots
+        if robot.serial == identifier[1]
+    )
diff --git a/tests/components/litterrobot/common.py b/tests/components/litterrobot/common.py
index f5b4e32a1e1..5bf6fb7cce6 100644
--- a/tests/components/litterrobot/common.py
+++ b/tests/components/litterrobot/common.py
@@ -142,3 +142,17 @@ FEEDER_ROBOT_DATA = {
 }
 
 VACUUM_ENTITY_ID = "vacuum.test_litter_box"
+
+
+async def remove_device(ws_client, device_id, config_entry_id):
+    """Remove config entry from a device."""
+    await ws_client.send_json(
+        {
+            "id": 5,
+            "type": "config/device_registry/remove_config_entry",
+            "config_entry_id": config_entry_id,
+            "device_id": device_id,
+        }
+    )
+    response = await ws_client.receive_json()
+    return response["success"]
diff --git a/tests/components/litterrobot/test_init.py b/tests/components/litterrobot/test_init.py
index 8d340f40515..170d6313029 100644
--- a/tests/components/litterrobot/test_init.py
+++ b/tests/components/litterrobot/test_init.py
@@ -1,5 +1,5 @@
 """Test Litter-Robot setup process."""
-from unittest.mock import patch
+from unittest.mock import MagicMock, patch
 
 from pylitterbot.exceptions import LitterRobotException, LitterRobotLoginException
 import pytest
@@ -13,14 +13,18 @@ from homeassistant.components.vacuum import (
 from homeassistant.config_entries import ConfigEntryState
 from homeassistant.const import ATTR_ENTITY_ID
 from homeassistant.core import HomeAssistant
+from homeassistant.helpers import device_registry as dr, entity_registry as er
+from homeassistant.helpers.entity_registry import EntityRegistry
+from homeassistant.setup import async_setup_component
 
-from .common import CONFIG, VACUUM_ENTITY_ID
+from .common import CONFIG, VACUUM_ENTITY_ID, remove_device
 from .conftest import setup_integration
 
 from tests.common import MockConfigEntry
+from tests.typing import WebSocketGenerator
 
 
-async def test_unload_entry(hass: HomeAssistant, mock_account) -> None:
+async def test_unload_entry(hass: HomeAssistant, mock_account: MagicMock) -> None:
     """Test being able to unload an entry."""
     entry = await setup_integration(hass, mock_account, VACUUM_DOMAIN)
 
@@ -49,7 +53,9 @@ async def test_unload_entry(hass: HomeAssistant, mock_account) -> None:
     ),
 )
 async def test_entry_not_setup(
-    hass: HomeAssistant, side_effect, expected_state
+    hass: HomeAssistant,
+    side_effect: LitterRobotException,
+    expected_state: ConfigEntryState,
 ) -> None:
     """Test being able to handle config entry not setup."""
     entry = MockConfigEntry(
@@ -64,3 +70,35 @@ async def test_entry_not_setup(
     ):
         await hass.config_entries.async_setup(entry.entry_id)
         assert entry.state is expected_state
+
+
+async def test_device_remove_devices(
+    hass: HomeAssistant, hass_ws_client: WebSocketGenerator, mock_account: MagicMock
+) -> None:
+    """Test we can only remove a device that no longer exists."""
+    assert await async_setup_component(hass, "config", {})
+    config_entry = await setup_integration(hass, mock_account, VACUUM_DOMAIN)
+
+    registry: EntityRegistry = er.async_get(hass)
+    entity = registry.entities[VACUUM_ENTITY_ID]
+    assert entity.unique_id == "LR3C012345-litter_box"
+
+    device_registry = dr.async_get(hass)
+    device_entry = device_registry.async_get(entity.device_id)
+    assert (
+        await remove_device(
+            await hass_ws_client(hass), device_entry.id, config_entry.entry_id
+        )
+        is False
+    )
+
+    dead_device_entry = device_registry.async_get_or_create(
+        config_entry_id=config_entry.entry_id,
+        identifiers={(litterrobot.DOMAIN, "test-serial", "remove-serial")},
+    )
+    assert (
+        await remove_device(
+            await hass_ws_client(hass), dead_device_entry.id, config_entry.entry_id
+        )
+        is True
+    )