diff --git a/homeassistant/components/ridwell/diagnostics.py b/homeassistant/components/ridwell/diagnostics.py
new file mode 100644
index 00000000000..fce89a639ad
--- /dev/null
+++ b/homeassistant/components/ridwell/diagnostics.py
@@ -0,0 +1,24 @@
+"""Diagnostics support for Ridwell."""
+from __future__ import annotations
+
+import dataclasses
+from typing import Any
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
+
+from .const import DATA_COORDINATOR, DOMAIN
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, entry: ConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+    coordinator: DataUpdateCoordinator = hass.data[DOMAIN][entry.entry_id][
+        DATA_COORDINATOR
+    ]
+
+    return {
+        "data": [dataclasses.asdict(event) for event in coordinator.data.values()],
+    }
diff --git a/tests/components/ridwell/conftest.py b/tests/components/ridwell/conftest.py
index 35b4ddded4e..221ce5be8d2 100644
--- a/tests/components/ridwell/conftest.py
+++ b/tests/components/ridwell/conftest.py
@@ -27,7 +27,7 @@ def account_fixture():
         },
         async_get_next_pickup_event=AsyncMock(
             return_value=RidwellPickupEvent(
-                AsyncMock(),
+                None,
                 "event_123",
                 date(2022, 1, 24),
                 [RidwellPickup("Plastic Film", "offer_123", 1, "product_123", 1)],
diff --git a/tests/components/ridwell/test_diagnostics.py b/tests/components/ridwell/test_diagnostics.py
new file mode 100644
index 00000000000..8427fa13e11
--- /dev/null
+++ b/tests/components/ridwell/test_diagnostics.py
@@ -0,0 +1,35 @@
+"""Test Ridwell diagnostics."""
+from tests.components.diagnostics import get_diagnostics_for_config_entry
+
+
+async def test_entry_diagnostics(hass, config_entry, hass_client, setup_ridwell):
+    """Test config entry diagnostics."""
+    assert await get_diagnostics_for_config_entry(hass, hass_client, config_entry) == {
+        "data": [
+            {
+                "_async_request": None,
+                "event_id": "event_123",
+                "pickup_date": {
+                    "__type": "<class 'datetime.date'>",
+                    "isoformat": "2022-01-24",
+                },
+                "pickups": [
+                    {
+                        "name": "Plastic Film",
+                        "offer_id": "offer_123",
+                        "priority": 1,
+                        "product_id": "product_123",
+                        "quantity": 1,
+                        "category": {
+                            "__type": "<enum 'PickupCategory'>",
+                            "repr": "<PickupCategory.STANDARD: 'standard'>",
+                        },
+                    }
+                ],
+                "state": {
+                    "__type": "<enum 'EventState'>",
+                    "repr": "<EventState.INITIALIZED: 'initialized'>",
+                },
+            }
+        ]
+    }