diff --git a/tests/components/landisgyr_heat_meter/snapshots/test_sensor.ambr b/tests/components/landisgyr_heat_meter/snapshots/test_sensor.ambr
new file mode 100644
index 00000000000..e149073d9c8
--- /dev/null
+++ b/tests/components/landisgyr_heat_meter/snapshots/test_sensor.ambr
@@ -0,0 +1,303 @@
+# serializer version: 1
+# name: test_create_sensors
+  list([
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'volume',
+        'friendly_name': 'Heat Meter Volume usage',
+        'icon': 'mdi:fire',
+        'state_class': <SensorStateClass.TOTAL: 'total'>,
+        'unit_of_measurement': <UnitOfVolume.CUBIC_METERS: 'm³'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_volume_usage',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': '456.0',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'energy',
+        'friendly_name': 'Heat Meter Heat usage GJ',
+        'icon': 'mdi:fire',
+        'state_class': <SensorStateClass.TOTAL: 'total'>,
+        'unit_of_measurement': <UnitOfEnergy.GIGA_JOULE: 'GJ'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_heat_usage_gj',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': '123.0',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'friendly_name': 'Heat Meter Heat previous year GJ',
+        'icon': 'mdi:fire',
+        'unit_of_measurement': <UnitOfEnergy.GIGA_JOULE: 'GJ'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_heat_previous_year_gj',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': '111.0',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'volume',
+        'friendly_name': 'Heat Meter Volume usage previous year',
+        'icon': 'mdi:fire',
+        'unit_of_measurement': <UnitOfVolume.CUBIC_METERS: 'm³'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_volume_usage_previous_year',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'friendly_name': 'Heat Meter Ownership number',
+        'icon': 'mdi:identifier',
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_ownership_number',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'friendly_name': 'Heat Meter Error number',
+        'icon': 'mdi:home-alert',
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_error_number',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'friendly_name': 'Heat Meter Device number',
+        'icon': 'mdi:identifier',
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_device_number',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'devicenr_789',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'duration',
+        'friendly_name': 'Heat Meter Measurement period minutes',
+        'unit_of_measurement': <UnitOfTime.MINUTES: 'min'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_measurement_period_minutes',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'power',
+        'friendly_name': 'Heat Meter Power max',
+        'unit_of_measurement': <UnitOfPower.KILO_WATT: 'kW'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_power_max',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'power',
+        'friendly_name': 'Heat Meter Power max previous year',
+        'unit_of_measurement': <UnitOfPower.KILO_WATT: 'kW'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_power_max_previous_year',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'friendly_name': 'Heat Meter Flowrate max',
+        'icon': 'mdi:water-outline',
+        'unit_of_measurement': <UnitOfVolumeFlowRate.CUBIC_METERS_PER_HOUR: 'm³/h'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_flowrate_max',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'friendly_name': 'Heat Meter Flowrate max previous year',
+        'icon': 'mdi:water-outline',
+        'unit_of_measurement': <UnitOfVolumeFlowRate.CUBIC_METERS_PER_HOUR: 'm³/h'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_flowrate_max_previous_year',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'temperature',
+        'friendly_name': 'Heat Meter Return temperature max',
+        'unit_of_measurement': <UnitOfTemperature.CELSIUS: '°C'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_return_temperature_max',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'temperature',
+        'friendly_name': 'Heat Meter Return temperature max previous year',
+        'unit_of_measurement': <UnitOfTemperature.CELSIUS: '°C'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_return_temperature_max_previous_year',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'temperature',
+        'friendly_name': 'Heat Meter Flow temperature max',
+        'unit_of_measurement': <UnitOfTemperature.CELSIUS: '°C'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_flow_temperature_max',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'temperature',
+        'friendly_name': 'Heat Meter Flow temperature max previous year',
+        'unit_of_measurement': <UnitOfTemperature.CELSIUS: '°C'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_flow_temperature_max_previous_year',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'duration',
+        'friendly_name': 'Heat Meter Operating hours',
+        'unit_of_measurement': <UnitOfTime.HOURS: 'h'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_operating_hours',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'duration',
+        'friendly_name': 'Heat Meter Flow hours',
+        'unit_of_measurement': <UnitOfTime.HOURS: 'h'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_flow_hours',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'duration',
+        'friendly_name': 'Heat Meter Fault hours',
+        'unit_of_measurement': <UnitOfTime.HOURS: 'h'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_fault_hours',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'duration',
+        'friendly_name': 'Heat Meter Fault hours previous year',
+        'unit_of_measurement': <UnitOfTime.HOURS: 'h'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_fault_hours_previous_year',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'friendly_name': 'Heat Meter Yearly set day',
+        'icon': 'mdi:clock-outline',
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_yearly_set_day',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'friendly_name': 'Heat Meter Monthly set day',
+        'icon': 'mdi:clock-outline',
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_monthly_set_day',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'device_class': 'timestamp',
+        'friendly_name': 'Heat Meter Meter date time',
+        'icon': 'mdi:clock-outline',
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_meter_date_time',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': '2022-05-20T02:41:17+00:00',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'friendly_name': 'Heat Meter Measuring range',
+        'icon': 'mdi:water-outline',
+        'unit_of_measurement': <UnitOfVolumeFlowRate.CUBIC_METERS_PER_HOUR: 'm³/h'>,
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_measuring_range',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+    StateSnapshot({
+      'attributes': ReadOnlyDict({
+        'friendly_name': 'Heat Meter Settings and firmware',
+      }),
+      'context': <ANY>,
+      'entity_id': 'sensor.heat_meter_settings_and_firmware',
+      'last_changed': <ANY>,
+      'last_updated': <ANY>,
+      'state': 'unknown',
+    }),
+  ])
+# ---
diff --git a/tests/components/landisgyr_heat_meter/test_sensor.py b/tests/components/landisgyr_heat_meter/test_sensor.py
index a37fab65a10..4de58a206e6 100644
--- a/tests/components/landisgyr_heat_meter/test_sensor.py
+++ b/tests/components/landisgyr_heat_meter/test_sensor.py
@@ -4,23 +4,11 @@ import datetime
 from unittest.mock import patch
 
 import serial
+from syrupy import SnapshotAssertion
 
 from homeassistant.components.homeassistant import DOMAIN as HA_DOMAIN
 from homeassistant.components.landisgyr_heat_meter.const import DOMAIN, POLLING_INTERVAL
-from homeassistant.components.sensor import (
-    ATTR_STATE_CLASS,
-    SensorDeviceClass,
-    SensorStateClass,
-)
-from homeassistant.const import (
-    ATTR_DEVICE_CLASS,
-    ATTR_ICON,
-    ATTR_UNIT_OF_MEASUREMENT,
-    STATE_UNAVAILABLE,
-    EntityCategory,
-    UnitOfEnergy,
-    UnitOfVolume,
-)
+from homeassistant.const import STATE_UNAVAILABLE
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import entity_registry as er
 from homeassistant.setup import async_setup_component
@@ -46,7 +34,10 @@ class MockHeatMeterResponse:
 
 @patch(API_HEAT_METER_SERVICE)
 async def test_create_sensors(
-    mock_heat_meter, hass: HomeAssistant, entity_registry: er.EntityRegistry
+    mock_heat_meter,
+    hass: HomeAssistant,
+    entity_registry: er.EntityRegistry,
+    snapshot: SnapshotAssertion,
 ) -> None:
     """Test sensor."""
     entry_data = {
@@ -55,7 +46,6 @@ async def test_create_sensors(
         "device_number": "123456789",
     }
     mock_entry = MockConfigEntry(domain=DOMAIN, unique_id=DOMAIN, data=entry_data)
-
     mock_entry.add_to_hass(hass)
 
     mock_heat_meter_response = MockHeatMeterResponse(
@@ -72,37 +62,7 @@ async def test_create_sensors(
     await async_setup_component(hass, HA_DOMAIN, {})
     await hass.async_block_till_done()
 
-    # check if 26 attributes have been created
-    assert len(hass.states.async_all()) == 25
-
-    state = hass.states.get("sensor.heat_meter_heat_usage_gj")
-    assert state
-    assert state.state == "123.0"
-    assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == UnitOfEnergy.GIGA_JOULE
-    assert state.attributes.get(ATTR_STATE_CLASS) == SensorStateClass.TOTAL
-    assert state.attributes.get(ATTR_DEVICE_CLASS) == SensorDeviceClass.ENERGY
-
-    state = hass.states.get("sensor.heat_meter_volume_usage")
-    assert state
-    assert state.state == "456.0"
-    assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == UnitOfVolume.CUBIC_METERS
-    assert state.attributes.get(ATTR_STATE_CLASS) == SensorStateClass.TOTAL
-
-    state = hass.states.get("sensor.heat_meter_device_number")
-    assert state
-    assert state.state == "devicenr_789"
-    assert state.attributes.get(ATTR_STATE_CLASS) is None
-    entity_registry_entry = entity_registry.async_get("sensor.heat_meter_device_number")
-    assert entity_registry_entry.entity_category == EntityCategory.DIAGNOSTIC
-
-    state = hass.states.get("sensor.heat_meter_meter_date_time")
-    assert state
-    assert state.attributes.get(ATTR_ICON) == "mdi:clock-outline"
-    assert state.attributes.get(ATTR_STATE_CLASS) is None
-    entity_registry_entry = entity_registry.async_get(
-        "sensor.heat_meter_meter_date_time"
-    )
-    assert entity_registry_entry.entity_category == EntityCategory.DIAGNOSTIC
+    assert hass.states.async_all() == snapshot
 
 
 @patch(API_HEAT_METER_SERVICE)