diff --git a/homeassistant/components/poolsense/config_flow.py b/homeassistant/components/poolsense/config_flow.py
index 61087ce89b8..3d4c37ef523 100644
--- a/homeassistant/components/poolsense/config_flow.py
+++ b/homeassistant/components/poolsense/config_flow.py
@@ -47,7 +47,7 @@ class PoolSenseConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
             )
 
             if not api_key_valid:
-                self._errors["base"] = "auth"
+                self._errors["base"] = "invalid_auth"
 
             if not self._errors:
                 return self.async_create_entry(
diff --git a/homeassistant/components/poolsense/sensor.py b/homeassistant/components/poolsense/sensor.py
index 6c816cba0c5..c50a8cb6b26 100644
--- a/homeassistant/components/poolsense/sensor.py
+++ b/homeassistant/components/poolsense/sensor.py
@@ -96,12 +96,10 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
 class PoolSenseSensor(Entity):
     """Sensor representing poolsense data."""
 
-    unique_id = None
-
     def __init__(self, coordinator, email, info_type):
         """Initialize poolsense sensor."""
         self._email = email
-        self.unique_id = f"{email}-{info_type}"
+        self._unique_id = f"{email}-{info_type}"
         self.coordinator = coordinator
         self.info_type = info_type
 
@@ -110,10 +108,15 @@ class PoolSenseSensor(Entity):
         """Return if sensor is available."""
         return self.coordinator.last_update_success
 
+    @property
+    def unique_id(self):
+        """Return a unique ID to use for this sensor."""
+        return self._unique_id
+
     @property
     def name(self):
         """Return the name of the particular component."""
-        return "PoolSense {}".format(SENSORS[self.info_type]["name"])
+        return f"PoolSense {SENSORS[self.info_type]['name']}"
 
     @property
     def should_poll(self):
diff --git a/tests/components/poolsense/test_config_flow.py b/tests/components/poolsense/test_config_flow.py
index 4a7b824f226..b7499208121 100644
--- a/tests/components/poolsense/test_config_flow.py
+++ b/tests/components/poolsense/test_config_flow.py
@@ -29,7 +29,7 @@ async def test_invalid_credentials(hass):
         )
 
     assert result["type"] == "form"
-    assert result["errors"] == {"base": "auth"}
+    assert result["errors"] == {"base": "invalid_auth"}
 
 
 async def test_valid_credentials(hass):