diff --git a/homeassistant/components/schedule/__init__.py b/homeassistant/components/schedule/__init__.py
index ea569f4e277..63de3daaf15 100644
--- a/homeassistant/components/schedule/__init__.py
+++ b/homeassistant/components/schedule/__init__.py
@@ -242,7 +242,7 @@ class ScheduleStorageCollection(DictStorageCollection):
     async def _update_data(self, item: dict, update_data: dict) -> dict:
         """Return a new updated data object."""
         self.SCHEMA(update_data)
-        return item | update_data
+        return {CONF_ID: item[CONF_ID]} | update_data
 
     async def _async_load_data(self) -> SerializedStorageCollection | None:
         """Load the data."""
diff --git a/tests/components/schedule/test_init.py b/tests/components/schedule/test_init.py
index 6fd6314c6bb..9a9ccc0c47a 100644
--- a/tests/components/schedule/test_init.py
+++ b/tests/components/schedule/test_init.py
@@ -617,11 +617,26 @@ async def test_ws_delete(
 
 @pytest.mark.freeze_time("2022-08-10 20:10:00-07:00")
 @pytest.mark.parametrize(
-    ("to", "next_event", "saved_to"),
+    ("to", "next_event", "saved_to", "icon_dict"),
     [
-        ("23:59:59", "2022-08-10T23:59:59-07:00", "23:59:59"),
-        ("24:00", "2022-08-11T00:00:00-07:00", "24:00:00"),
-        ("24:00:00", "2022-08-11T00:00:00-07:00", "24:00:00"),
+        (
+            "23:59:59",
+            "2022-08-10T23:59:59-07:00",
+            "23:59:59",
+            {CONF_ICON: "mdi:party-pooper"},
+        ),
+        (
+            "24:00",
+            "2022-08-11T00:00:00-07:00",
+            "24:00:00",
+            {CONF_ICON: "mdi:party-popper"},
+        ),
+        (
+            "24:00:00",
+            "2022-08-11T00:00:00-07:00",
+            "24:00:00",
+            {},
+        ),
     ],
 )
 async def test_update(
@@ -632,6 +647,7 @@ async def test_update(
     to: str,
     next_event: str,
     saved_to: str,
+    icon_dict: dict,
 ) -> None:
     """Test updating the schedule."""
     assert await schedule_setup()
@@ -654,7 +670,7 @@ async def test_update(
             "type": f"{DOMAIN}/update",
             f"{DOMAIN}_id": "from_storage",
             CONF_NAME: "Party pooper",
-            CONF_ICON: "mdi:party-pooper",
+            **icon_dict,
             CONF_MONDAY: [],
             CONF_TUESDAY: [],
             CONF_WEDNESDAY: [{CONF_FROM: "17:00:00", CONF_TO: to}],
@@ -671,7 +687,7 @@ async def test_update(
     assert state
     assert state.state == STATE_ON
     assert state.attributes[ATTR_FRIENDLY_NAME] == "Party pooper"
-    assert state.attributes[ATTR_ICON] == "mdi:party-pooper"
+    assert state.attributes.get(ATTR_ICON) == icon_dict.get(CONF_ICON)
     assert state.attributes[ATTR_NEXT_EVENT].isoformat() == next_event
 
     await client.send_json({"id": 2, "type": f"{DOMAIN}/list"})