diff --git a/tests/sensors/test_power.py b/tests/sensors/test_power.py
index 348f234b7..8bd32bd59 100644
--- a/tests/sensors/test_power.py
+++ b/tests/sensors/test_power.py
@@ -3,13 +3,19 @@
 import pytest
 from homeassistant.components import input_boolean, sensor
 from homeassistant.components.utility_meter.sensor import SensorDeviceClass
+from homeassistant.components.vacuum import (
+    ATTR_BATTERY_LEVEL,
+    STATE_CLEANING,
+    STATE_DOCKED,
+    STATE_RETURNING,
+)
 from homeassistant.const import (
     CONF_ENTITIES,
     CONF_ENTITY_ID,
     CONF_NAME,
     CONF_PLATFORM,
     STATE_OFF,
-    STATE_ON,
+    STATE_ON, CONF_ATTRIBUTE,
 )
 from homeassistant.core import EVENT_HOMEASSISTANT_START, CoreState, HomeAssistant
 from homeassistant.setup import async_setup_component
@@ -29,8 +35,10 @@
     DOMAIN,
     DUMMY_ENTITY_ID,
     CalculationStrategy,
+    CONF_LINEAR,
+    CONF_CALIBRATE,
+    CONF_CALCULATION_ENABLED_CONDITION,
 )
-from custom_components.powercalc.errors import UnsupportedMode
 
 from ..common import (
     create_input_boolean,
@@ -193,3 +201,68 @@ async def test_error_when_no_strategy_has_been_configured(
     )
 
     assert "Skipping sensor setup" in caplog.text
+
+
+async def test_strategy_enabled_condition(hass: HomeAssistant):
+    """
+    Test calculation_enabled_condition is working correctly.
+    This is used for example on robot vacuum cleaners.
+    This test simulates a vacuum cleaner going through following stages:
+     - cleaning
+     - returning
+     - docked
+    When the state is docked the calculation is activated and linear calibration is used to map the consumption while charging
+    """
+    vacuum_entity_id = "vacuum.my_robot_cleaner"
+    power_entity_id = "sensor.my_robot_cleaner_power"
+
+    await run_powercalc_setup_yaml_config(
+        hass,
+        {
+            CONF_ENTITY_ID: vacuum_entity_id,
+            CONF_CALCULATION_ENABLED_CONDITION: "{{ is_state('vacuum.my_robot_cleaner', 'docked') }}",
+            CONF_LINEAR: {
+                CONF_ATTRIBUTE: "battery_level",
+                CONF_CALIBRATE: [
+                    "1 -> 20",
+                    "79 -> 20",
+                    "80 -> 15",
+                    "99 -> 8",
+                    "100 -> 1.5"
+                ]
+            }
+        }
+    )
+
+    assert hass.states.get(power_entity_id)
+
+    hass.states.async_set(vacuum_entity_id, STATE_CLEANING, {ATTR_BATTERY_LEVEL: 40})
+    await hass.async_block_till_done()
+
+    assert hass.states.get(power_entity_id).state == "0.00"
+
+    hass.states.async_set(vacuum_entity_id, STATE_RETURNING, {ATTR_BATTERY_LEVEL: 40})
+    await hass.async_block_till_done()
+
+    assert hass.states.get(power_entity_id).state == "0.00"
+
+    hass.states.async_set(vacuum_entity_id, STATE_DOCKED, {ATTR_BATTERY_LEVEL: 20})
+    await hass.async_block_till_done()
+
+    assert hass.states.get(power_entity_id).state == "20.00"
+
+    hass.states.async_set(vacuum_entity_id, STATE_DOCKED, {ATTR_BATTERY_LEVEL: 60})
+    await hass.async_block_till_done()
+
+    assert hass.states.get(power_entity_id).state == "20.00"
+
+    hass.states.async_set(vacuum_entity_id, STATE_DOCKED, {ATTR_BATTERY_LEVEL: 80})
+    await hass.async_block_till_done()
+
+    assert hass.states.get(power_entity_id).state == "15.00"
+
+    hass.states.async_set(vacuum_entity_id, STATE_DOCKED, {ATTR_BATTERY_LEVEL: 100})
+    await hass.async_block_till_done()
+
+    assert hass.states.get(power_entity_id).state == "1.50"
+