diff --git a/homeassistant/components/garmin_connect/const.py b/homeassistant/components/garmin_connect/const.py
index ebf56b27a7f..ae1c2f1caa1 100644
--- a/homeassistant/components/garmin_connect/const.py
+++ b/homeassistant/components/garmin_connect/const.py
@@ -311,8 +311,8 @@ GARMIN_ENTITY_LIST = {
     ],
     "weight": ["Weight", "kg", "mdi:weight-kilogram", None, False],
     "bmi": ["BMI", "", "mdi:food", None, False],
-    "bodyFat": ["Body Fat", "%", "mdi:food", None, False],
-    "bodyWater": ["Body Water", "%", "mdi:water-percent", None, False],
+    "bodyFat": ["Body Fat", UNIT_PERCENTAGE, "mdi:food", None, False],
+    "bodyWater": ["Body Water", UNIT_PERCENTAGE, "mdi:water-percent", None, False],
     "bodyMass": ["Body Mass", "kg", "mdi:food", None, False],
     "muscleMass": ["Muscle Mass", "kg", "mdi:dumbbell", None, False],
     "physiqueRating": ["Physique Rating", "", "mdi:numeric", None, False],
diff --git a/tests/components/abode/test_sensor.py b/tests/components/abode/test_sensor.py
index b4ce78faedd..944c1bbeb8c 100644
--- a/tests/components/abode/test_sensor.py
+++ b/tests/components/abode/test_sensor.py
@@ -7,6 +7,7 @@ from homeassistant.const import (
     ATTR_UNIT_OF_MEASUREMENT,
     DEVICE_CLASS_HUMIDITY,
     TEMP_CELSIUS,
+    UNIT_PERCENTAGE,
 )
 
 from .common import setup_platform
@@ -31,7 +32,7 @@ async def test_attributes(hass):
     assert not state.attributes.get("battery_low")
     assert not state.attributes.get("no_response")
     assert state.attributes.get("device_type") == "LM"
-    assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == "%"
+    assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == UNIT_PERCENTAGE
     assert state.attributes.get(ATTR_FRIENDLY_NAME) == "Environment Sensor Humidity"
     assert state.attributes.get(ATTR_DEVICE_CLASS) == DEVICE_CLASS_HUMIDITY
 
diff --git a/tests/components/august/test_sensor.py b/tests/components/august/test_sensor.py
index bf87a2888a5..f7e46297532 100644
--- a/tests/components/august/test_sensor.py
+++ b/tests/components/august/test_sensor.py
@@ -1,6 +1,6 @@
 """The sensor tests for the august platform."""
 
-from homeassistant.const import STATE_UNAVAILABLE
+from homeassistant.const import STATE_UNAVAILABLE, UNIT_PERCENTAGE
 
 from tests.components.august.mocks import (
     _create_august_with_devices,
@@ -20,7 +20,10 @@ async def test_create_doorbell(hass):
         "sensor.k98gidt45gul_name_battery"
     )
     assert sensor_k98gidt45gul_name_battery.state == "96"
-    assert sensor_k98gidt45gul_name_battery.attributes["unit_of_measurement"] == "%"
+    assert (
+        sensor_k98gidt45gul_name_battery.attributes["unit_of_measurement"]
+        == UNIT_PERCENTAGE
+    )
 
 
 async def test_create_doorbell_offline(hass):
@@ -31,7 +34,9 @@ async def test_create_doorbell_offline(hass):
 
     sensor_tmt100_name_battery = hass.states.get("sensor.tmt100_name_battery")
     assert sensor_tmt100_name_battery.state == "81"
-    assert sensor_tmt100_name_battery.attributes["unit_of_measurement"] == "%"
+    assert (
+        sensor_tmt100_name_battery.attributes["unit_of_measurement"] == UNIT_PERCENTAGE
+    )
 
     entry = entity_registry.async_get("sensor.tmt100_name_battery")
     assert entry
@@ -63,7 +68,7 @@ async def test_create_lock_with_linked_keypad(hass):
         sensor_a6697750d607098bae8d6baa11ef8063_name_battery.attributes[
             "unit_of_measurement"
         ]
-        == "%"
+        == UNIT_PERCENTAGE
     )
     entry = entity_registry.async_get(
         "sensor.a6697750d607098bae8d6baa11ef8063_name_battery"
@@ -73,7 +78,7 @@ async def test_create_lock_with_linked_keypad(hass):
 
     state = hass.states.get("sensor.front_door_lock_keypad_battery")
     assert state.state == "60"
-    assert state.attributes["unit_of_measurement"] == "%"
+    assert state.attributes["unit_of_measurement"] == UNIT_PERCENTAGE
     entry = entity_registry.async_get("sensor.front_door_lock_keypad_battery")
     assert entry
     assert entry.unique_id == "5bc65c24e6ef2a263e1450a8_linked_keypad_battery"
@@ -93,7 +98,7 @@ async def test_create_lock_with_low_battery_linked_keypad(hass):
         sensor_a6697750d607098bae8d6baa11ef8063_name_battery.attributes[
             "unit_of_measurement"
         ]
-        == "%"
+        == UNIT_PERCENTAGE
     )
     entry = entity_registry.async_get(
         "sensor.a6697750d607098bae8d6baa11ef8063_name_battery"
@@ -103,7 +108,7 @@ async def test_create_lock_with_low_battery_linked_keypad(hass):
 
     state = hass.states.get("sensor.front_door_lock_keypad_battery")
     assert state.state == "10"
-    assert state.attributes["unit_of_measurement"] == "%"
+    assert state.attributes["unit_of_measurement"] == UNIT_PERCENTAGE
     entry = entity_registry.async_get("sensor.front_door_lock_keypad_battery")
     assert entry
     assert entry.unique_id == "5bc65c24e6ef2a263e1450a8_linked_keypad_battery"
diff --git a/tests/components/nexia/test_sensor.py b/tests/components/nexia/test_sensor.py
index 518993cf24a..a0fa387cd43 100644
--- a/tests/components/nexia/test_sensor.py
+++ b/tests/components/nexia/test_sensor.py
@@ -1,6 +1,6 @@
 """The sensor tests for the nexia platform."""
 
-from homeassistant.const import TEMP_CELSIUS
+from homeassistant.const import TEMP_CELSIUS, UNIT_PERCENTAGE
 
 from .util import async_init_integration
 
@@ -69,7 +69,7 @@ async def test_create_sensors(hass):
     expected_attributes = {
         "attribution": "Data provided by mynexia.com",
         "friendly_name": "Master Suite Current Compressor Speed",
-        "unit_of_measurement": "%",
+        "unit_of_measurement": UNIT_PERCENTAGE,
     }
     # Only test for a subset of attributes in case
     # HA changes the implementation and a new one appears
@@ -99,7 +99,7 @@ async def test_create_sensors(hass):
         "attribution": "Data provided by mynexia.com",
         "device_class": "humidity",
         "friendly_name": "Master Suite Relative Humidity",
-        "unit_of_measurement": "%",
+        "unit_of_measurement": UNIT_PERCENTAGE,
     }
     # Only test for a subset of attributes in case
     # HA changes the implementation and a new one appears
@@ -113,7 +113,7 @@ async def test_create_sensors(hass):
     expected_attributes = {
         "attribution": "Data provided by mynexia.com",
         "friendly_name": "Master Suite Requested Compressor Speed",
-        "unit_of_measurement": "%",
+        "unit_of_measurement": UNIT_PERCENTAGE,
     }
     # Only test for a subset of attributes in case
     # HA changes the implementation and a new one appears
diff --git a/tests/components/nut/test_sensor.py b/tests/components/nut/test_sensor.py
index 2e461050507..a04f570d367 100644
--- a/tests/components/nut/test_sensor.py
+++ b/tests/components/nut/test_sensor.py
@@ -1,5 +1,6 @@
 """The sensor tests for the nut platform."""
 
+from homeassistant.const import UNIT_PERCENTAGE
 
 from .util import async_init_integration
 
@@ -16,7 +17,7 @@ async def test_pr3000rt2u(hass):
         "device_class": "battery",
         "friendly_name": "Ups1 Battery Charge",
         "state": "Online",
-        "unit_of_measurement": "%",
+        "unit_of_measurement": UNIT_PERCENTAGE,
     }
     # Only test for a subset of attributes in case
     # HA changes the implementation and a new one appears
@@ -37,7 +38,7 @@ async def test_cp1350c(hass):
         "device_class": "battery",
         "friendly_name": "Ups1 Battery Charge",
         "state": "Online",
-        "unit_of_measurement": "%",
+        "unit_of_measurement": UNIT_PERCENTAGE,
     }
     # Only test for a subset of attributes in case
     # HA changes the implementation and a new one appears
@@ -58,7 +59,7 @@ async def test_5e850i(hass):
         "device_class": "battery",
         "friendly_name": "Ups1 Battery Charge",
         "state": "Online",
-        "unit_of_measurement": "%",
+        "unit_of_measurement": UNIT_PERCENTAGE,
     }
     # Only test for a subset of attributes in case
     # HA changes the implementation and a new one appears
diff --git a/tests/components/powerwall/test_sensor.py b/tests/components/powerwall/test_sensor.py
index 5d21a11d4b4..3ab7e051a19 100644
--- a/tests/components/powerwall/test_sensor.py
+++ b/tests/components/powerwall/test_sensor.py
@@ -3,6 +3,7 @@
 from asynctest import patch
 
 from homeassistant.components.powerwall.const import DOMAIN
+from homeassistant.const import UNIT_PERCENTAGE
 from homeassistant.setup import async_setup_component
 
 from .mocks import _mock_get_config, _mock_powerwall_with_fixtures
@@ -17,7 +18,7 @@ async def test_sensors(hass):
         "homeassistant.components.powerwall.config_flow.PowerWall",
         return_value=mock_powerwall,
     ), patch(
-        "homeassistant.components.powerwall.PowerWall", return_value=mock_powerwall,
+        "homeassistant.components.powerwall.PowerWall", return_value=mock_powerwall
     ):
         assert await async_setup_component(hass, DOMAIN, _mock_get_config())
         await hass.async_block_till_done()
@@ -99,7 +100,7 @@ async def test_sensors(hass):
     state = hass.states.get("sensor.powerwall_charge")
     assert state.state == "47.32"
     expected_attributes = {
-        "unit_of_measurement": "%",
+        "unit_of_measurement": UNIT_PERCENTAGE,
         "friendly_name": "Powerwall Charge",
         "device_class": "battery",
     }