diff --git a/tests/components/wolflink/test_sensor.py b/tests/components/wolflink/test_sensor.py
new file mode 100644
index 00000000000..c7f2f6572f3
--- /dev/null
+++ b/tests/components/wolflink/test_sensor.py
@@ -0,0 +1,213 @@
+"""Tests for the Wolflink sensor platform."""
+
+from unittest.mock import MagicMock
+
+import pytest
+
+from homeassistant.components.wolflink.const import (
+    COORDINATOR,
+    DEVICE_ID,
+    DOMAIN,
+    PARAMETERS,
+)
+from homeassistant.components.wolflink.sensor import (
+    WolfLinkEnergy,
+    WolfLinkHours,
+    WolfLinkPercentage,
+    WolfLinkPower,
+    WolfLinkPressure,
+    WolfLinkSensor,
+    WolfLinkState,
+    WolfLinkTemperature,
+    async_setup_entry,
+)
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import (
+    PERCENTAGE,
+    UnitOfEnergy,
+    UnitOfPower,
+    UnitOfPressure,
+    UnitOfTemperature,
+    UnitOfTime,
+)
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
+
+
+@pytest.fixture
+def mock_coordinator() -> DataUpdateCoordinator:
+    """Mock the data update coordinator."""
+    return DataUpdateCoordinator(
+        hass=None,
+        logger=None,
+        name="Wolf",
+        update_method=None,
+        update_interval=None,
+    )
+
+
+@pytest.fixture
+def mock_config_entry() -> ConfigEntry:
+    """Mock the config entry."""
+    return ConfigEntry(
+        entry_id="test",
+        domain=DOMAIN,
+        data={},
+        title="Mock Title",
+    )
+
+
+@pytest.fixture
+def mock_hass() -> HomeAssistant:
+    """Mock Home Assistant instance."""
+    return HomeAssistant()
+
+
+@pytest.fixture
+def mock_add_entities() -> AddConfigEntryEntitiesCallback:
+    """Mock add entities callback."""
+    return MagicMock()
+
+
+async def test_async_setup_entry(
+    mock_hass: HomeAssistant,
+    mock_config_entry: ConfigEntry,
+    mock_add_entities: AddConfigEntryEntitiesCallback,
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test async setup entry."""
+    mock_hass.data = {
+        DOMAIN: {
+            mock_config_entry.entry_id: {
+                COORDINATOR: mock_coordinator,
+                PARAMETERS: [],
+                DEVICE_ID: "mock_device_id",
+            }
+        }
+    }
+    await async_setup_entry(mock_hass, mock_config_entry, mock_add_entities)
+    assert mock_add_entities.call_count == 1
+
+
+def test_wolflink_sensor_initialization(
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test WolflinkSensor initialization."""
+    parameter = MagicMock()
+    parameter.name = "Outside Temperature"
+    parameter.parameter_id = "outside_temp"
+    sensor = WolfLinkSensor(mock_coordinator, parameter, "mock_device_id")
+    assert sensor._attr_name == "Outside Temperature"
+    assert sensor._attr_unique_id == "mock_device_id:outside_temp"
+
+
+def test_wolflink_sensor_native_value(
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test WolflinkSensor native value."""
+    parameter = MagicMock()
+    parameter.parameter_id = "outside_temp"
+    sensor = WolfLinkSensor(mock_coordinator, parameter, "mock_device_id")
+    mock_coordinator.data = {"outside_temp": [None, 20]}
+    assert sensor.native_value == 20
+
+
+def test_wolflink_sensor_extra_state_attributes(
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test WolflinkSensor extra state attributes."""
+    parameter = MagicMock()
+    parameter.parameter_id = "outside_temp"
+    parameter.value_id = "value_id"
+    parameter.parent = "parent"
+    sensor = WolfLinkSensor(mock_coordinator, parameter, "mock_device_id")
+    attributes = sensor.extra_state_attributes
+    assert attributes["parameter_id"] == "outside_temp"
+    assert attributes["value_id"] == "value_id"
+    assert attributes["parent"] == "parent"
+
+
+def test_wolflink_temperature_initialization(
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test WolflinkTemperature initialization."""
+    parameter = MagicMock()
+    parameter.name = "Outside Temperature"
+    parameter.parameter_id = "outside_temp"
+    sensor = WolfLinkTemperature(mock_coordinator, parameter, "mock_device_id")
+    assert sensor._attr_device_class == "temperature"
+    assert sensor._attr_native_unit_of_measurement == UnitOfTemperature.CELSIUS
+
+
+def test_wolflink_pressure_initialization(
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test WolflinkPressure initialization."""
+    parameter = MagicMock()
+    parameter.name = "Pressure"
+    parameter.parameter_id = "pressure"
+    sensor = WolfLinkPressure(mock_coordinator, parameter, "mock_device_id")
+    assert sensor._attr_device_class == "pressure"
+    assert sensor._attr_native_unit_of_measurement == UnitOfPressure.BAR
+
+
+def test_wolflink_power_initialization(
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test WolflinkPower initialization."""
+    parameter = MagicMock()
+    parameter.name = "Power"
+    parameter.parameter_id = "power"
+    sensor = WolfLinkPower(mock_coordinator, parameter, "mock_device_id")
+    assert sensor._attr_device_class == "power"
+    assert sensor._attr_native_unit_of_measurement == UnitOfPower.KILO_WATT
+
+
+def test_wolflink_energy_initialization(
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test WolflinkEnergy initialization."""
+    parameter = MagicMock()
+    parameter.name = "Energy"
+    parameter.parameter_id = "energy"
+    sensor = WolfLinkEnergy(mock_coordinator, parameter, "mock_device_id")
+    assert sensor._attr_device_class == "energy"
+    assert sensor._attr_native_unit_of_measurement == UnitOfEnergy.KILO_WATT_HOUR
+
+
+def test_wolflink_percentage_initialization(
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test WolflinkPercentage initialization."""
+    parameter = MagicMock()
+    parameter.name = "Percentage"
+    parameter.parameter_id = "percentage"
+    parameter.unit = PERCENTAGE
+    sensor = WolfLinkPercentage(mock_coordinator, parameter, "mock_device_id")
+    assert sensor.native_unit_of_measurement == PERCENTAGE
+
+
+def test_wolflink_state_initialization(
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test WolflinkState initialization."""
+    parameter = MagicMock()
+    parameter.name = "State"
+    parameter.parameter_id = "state"
+    parameter.items = [MagicMock(value=1, name="On"), MagicMock(value=0, name="Off")]
+    sensor = WolfLinkState(mock_coordinator, parameter, "mock_device_id")
+    mock_coordinator.data = {"state": [None, 1]}
+    assert sensor.native_value == "On"
+
+
+def test_wolflink_hours_initialization(
+    mock_coordinator: DataUpdateCoordinator,
+) -> None:
+    """Test WolflinkHours initialization."""
+    parameter = MagicMock()
+    parameter.name = "Hours"
+    parameter.parameter_id = "hours"
+    sensor = WolfLinkHours(mock_coordinator, parameter, "mock_device_id")
+    assert sensor._attr_icon == "mdi:clock"
+    assert sensor._attr_native_unit_of_measurement == UnitOfTime.HOURS