diff --git a/homeassistant/components/lutron_caseta/diagnostics.py b/homeassistant/components/lutron_caseta/diagnostics.py
new file mode 100644
index 00000000000..7ae0b5c40a9
--- /dev/null
+++ b/homeassistant/components/lutron_caseta/diagnostics.py
@@ -0,0 +1,31 @@
+"""Diagnostics support for lutron_caseta."""
+from __future__ import annotations
+
+from typing import Any
+
+from pylutron_caseta.smartbridge import Smartbridge
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+
+from .const import BRIDGE_LEAP, DOMAIN
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, entry: ConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+    bridge: Smartbridge = hass.data[DOMAIN][entry.entry_id][BRIDGE_LEAP]
+    return {
+        "entry": {
+            "title": entry.title,
+            "data": dict(entry.data),
+        },
+        "data": {
+            "devices": bridge.devices,
+            "buttons": bridge.buttons,
+            "scenes": bridge.scenes,
+            "occupancy_groups": bridge.occupancy_groups,
+            "areas": bridge.areas,
+        },
+    }
diff --git a/tests/components/lutron_caseta/__init__.py b/tests/components/lutron_caseta/__init__.py
index 0e0ca8686ef..ace4066ae3b 100644
--- a/tests/components/lutron_caseta/__init__.py
+++ b/tests/components/lutron_caseta/__init__.py
@@ -1 +1,42 @@
 """Tests for the Lutron Caseta integration."""
+
+
+class MockBridge:
+    """Mock Lutron bridge that emulates configured connected status."""
+
+    def __init__(self, can_connect=True):
+        """Initialize MockBridge instance with configured mock connectivity."""
+        self.can_connect = can_connect
+        self.is_currently_connected = False
+        self.buttons = {}
+        self.areas = {}
+        self.occupancy_groups = {}
+        self.scenes = self.get_scenes()
+        self.devices = self.get_devices()
+
+    async def connect(self):
+        """Connect the mock bridge."""
+        if self.can_connect:
+            self.is_currently_connected = True
+
+    def is_connected(self):
+        """Return whether the mock bridge is connected."""
+        return self.is_currently_connected
+
+    def get_devices(self):
+        """Return devices on the bridge."""
+        return {
+            "1": {"serial": 1234, "name": "bridge", "model": "model", "type": "type"}
+        }
+
+    def get_devices_by_domain(self, domain):
+        """Return devices on the bridge."""
+        return {}
+
+    def get_scenes(self):
+        """Return scenes on the bridge."""
+        return {}
+
+    async def close(self):
+        """Close the mock bridge connection."""
+        self.is_currently_connected = False
diff --git a/tests/components/lutron_caseta/test_config_flow.py b/tests/components/lutron_caseta/test_config_flow.py
index 9dbedeacf5b..821bf07cf08 100644
--- a/tests/components/lutron_caseta/test_config_flow.py
+++ b/tests/components/lutron_caseta/test_config_flow.py
@@ -20,6 +20,8 @@ from homeassistant.components.lutron_caseta.const import (
 )
 from homeassistant.const import CONF_HOST
 
+from . import MockBridge
+
 from tests.common import MockConfigEntry
 
 ATTR_HOSTNAME = "hostname"
@@ -39,32 +41,6 @@ MOCK_ASYNC_PAIR_SUCCESS = {
 }
 
 
-class MockBridge:
-    """Mock Lutron bridge that emulates configured connected status."""
-
-    def __init__(self, can_connect=True):
-        """Initialize MockBridge instance with configured mock connectivity."""
-        self.can_connect = can_connect
-        self.is_currently_connected = False
-
-    async def connect(self):
-        """Connect the mock bridge."""
-        if self.can_connect:
-            self.is_currently_connected = True
-
-    def is_connected(self):
-        """Return whether the mock bridge is connected."""
-        return self.is_currently_connected
-
-    def get_devices(self):
-        """Return devices on the bridge."""
-        return {"1": {"serial": 1234}}
-
-    async def close(self):
-        """Close the mock bridge connection."""
-        self.is_currently_connected = False
-
-
 async def test_bridge_import_flow(hass):
     """Test a bridge entry gets created and set up during the import flow."""
 
diff --git a/tests/components/lutron_caseta/test_diagnostics.py b/tests/components/lutron_caseta/test_diagnostics.py
new file mode 100644
index 00000000000..89fcb65df9d
--- /dev/null
+++ b/tests/components/lutron_caseta/test_diagnostics.py
@@ -0,0 +1,60 @@
+"""Test the Lutron Caseta diagnostics."""
+
+from unittest.mock import patch
+
+from homeassistant.components.lutron_caseta import DOMAIN
+from homeassistant.components.lutron_caseta.const import (
+    CONF_CA_CERTS,
+    CONF_CERTFILE,
+    CONF_KEYFILE,
+)
+from homeassistant.const import CONF_HOST
+
+from . import MockBridge
+
+from tests.common import MockConfigEntry
+from tests.components.diagnostics import get_diagnostics_for_config_entry
+
+
+async def test_diagnostics(hass, hass_client) -> None:
+    """Test generating diagnostics for lutron_caseta."""
+    config_entry = MockConfigEntry(
+        domain=DOMAIN,
+        data={
+            CONF_HOST: "1.1.1.1",
+            CONF_KEYFILE: "",
+            CONF_CERTFILE: "",
+            CONF_CA_CERTS: "",
+        },
+        unique_id="abc",
+    )
+    config_entry.add_to_hass(hass)
+
+    with patch(
+        "homeassistant.components.lutron_caseta.Smartbridge.create_tls",
+        return_value=MockBridge(can_connect=True),
+    ):
+        await hass.config_entries.async_setup(config_entry.entry_id)
+        await hass.async_block_till_done()
+
+    diag = await get_diagnostics_for_config_entry(hass, hass_client, config_entry)
+    assert diag == {
+        "data": {
+            "areas": {},
+            "buttons": {},
+            "devices": {
+                "1": {
+                    "model": "model",
+                    "name": "bridge",
+                    "serial": 1234,
+                    "type": "type",
+                }
+            },
+            "occupancy_groups": {},
+            "scenes": {},
+        },
+        "entry": {
+            "data": {"ca_certs": "", "certfile": "", "host": "1.1.1.1", "keyfile": ""},
+            "title": "Mock Title",
+        },
+    }