diff --git a/homeassistant/components/litterrobot/diagnostics.py b/homeassistant/components/litterrobot/diagnostics.py
new file mode 100644
index 00000000000..4cdd8cb1a8c
--- /dev/null
+++ b/homeassistant/components/litterrobot/diagnostics.py
@@ -0,0 +1,24 @@
+"""Diagnostics support for Litter-Robot."""
+
+from __future__ import annotations
+
+from typing import Any
+
+from pylitterbot.utils import REDACT_FIELDS
+
+from homeassistant.components.diagnostics import async_redact_data
+from homeassistant.core import HomeAssistant
+
+from .coordinator import LitterRobotConfigEntry
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, entry: LitterRobotConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+    account = entry.runtime_data.account
+    data = {
+        "robots": [robot.to_dict() for robot in account.robots],
+        "pets": [pet.to_dict() for pet in account.pets],
+    }
+    return async_redact_data(data, REDACT_FIELDS)
diff --git a/homeassistant/components/litterrobot/quality_scale.yaml b/homeassistant/components/litterrobot/quality_scale.yaml
index 612826475dd..172e3ce1f27 100644
--- a/homeassistant/components/litterrobot/quality_scale.yaml
+++ b/homeassistant/components/litterrobot/quality_scale.yaml
@@ -42,7 +42,7 @@ rules:
 
   # Gold
   devices: done
-  diagnostics: todo
+  diagnostics: done
   discovery-update-info:
     status: done
     comment: The integration is cloud-based
diff --git a/tests/components/litterrobot/snapshots/test_diagnostics.ambr b/tests/components/litterrobot/snapshots/test_diagnostics.ambr
new file mode 100644
index 00000000000..7099bf41d31
--- /dev/null
+++ b/tests/components/litterrobot/snapshots/test_diagnostics.ambr
@@ -0,0 +1,24 @@
+# serializer version: 1
+# name: test_diagnostics
+  dict({
+    'pets': list([
+    ]),
+    'robots': list([
+      dict({
+        'cleanCycleWaitTimeMinutes': '7',
+        'cycleCapacity': '30',
+        'cycleCount': '15',
+        'cyclesAfterDrawerFull': '0',
+        'lastSeen': '2022-09-17T13:06:37.884Z',
+        'litterRobotId': '**REDACTED**',
+        'litterRobotNickname': 'Test',
+        'litterRobotSerial': '**REDACTED**',
+        'nightLightActive': '1',
+        'panelLockActive': '0',
+        'powerStatus': 'AC',
+        'sleepModeActive': '112:50:19',
+        'unitStatus': 'RDY',
+      }),
+    ]),
+  })
+# ---
diff --git a/tests/components/litterrobot/test_diagnostics.py b/tests/components/litterrobot/test_diagnostics.py
new file mode 100644
index 00000000000..1d0e37845d9
--- /dev/null
+++ b/tests/components/litterrobot/test_diagnostics.py
@@ -0,0 +1,24 @@
+"""Test Litter-Robot diagnostics."""
+
+from unittest.mock import MagicMock
+
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.core import HomeAssistant
+
+from .conftest import setup_integration
+
+from tests.components.diagnostics import get_diagnostics_for_config_entry
+from tests.typing import ClientSessionGenerator
+
+
+async def test_diagnostics(
+    hass: HomeAssistant,
+    mock_account: MagicMock,
+    hass_client: ClientSessionGenerator,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Test generating diagnostics for a config entry."""
+    entry = await setup_integration(hass, mock_account)
+    diag = await get_diagnostics_for_config_entry(hass, hass_client, entry)
+    assert diag == snapshot