diff --git a/homeassistant/components/bluetooth/passive_update_coordinator.py b/homeassistant/components/bluetooth/passive_update_coordinator.py
index ccff85e5027546..be232f87b24a3f 100644
--- a/homeassistant/components/bluetooth/passive_update_coordinator.py
+++ b/homeassistant/components/bluetooth/passive_update_coordinator.py
@@ -4,6 +4,8 @@
 
 from typing import TYPE_CHECKING, Any
 
+from typing_extensions import TypeVar
+
 from homeassistant.core import CALLBACK_TYPE, HomeAssistant, callback
 from homeassistant.helpers.update_coordinator import (
     BaseCoordinatorEntity,
@@ -18,6 +20,12 @@
 
     from . import BluetoothChange, BluetoothScanningMode, BluetoothServiceInfoBleak
 
+_PassiveBluetoothDataUpdateCoordinatorT = TypeVar(
+    "_PassiveBluetoothDataUpdateCoordinatorT",
+    bound="PassiveBluetoothDataUpdateCoordinator",
+    default="PassiveBluetoothDataUpdateCoordinator",
+)
+
 
 class PassiveBluetoothDataUpdateCoordinator(
     BasePassiveBluetoothCoordinator, BaseDataUpdateCoordinatorProtocol
@@ -90,9 +98,7 @@ def _async_handle_bluetooth_event(
         self.async_update_listeners()
 
 
-class PassiveBluetoothCoordinatorEntity[
-    _PassiveBluetoothDataUpdateCoordinatorT: PassiveBluetoothDataUpdateCoordinator = PassiveBluetoothDataUpdateCoordinator
-](  # pylint: disable=hass-enforce-class-module
+class PassiveBluetoothCoordinatorEntity(  # pylint: disable=hass-enforce-class-module
     BaseCoordinatorEntity[_PassiveBluetoothDataUpdateCoordinatorT]
 ):
     """A class for entities using DataUpdateCoordinator."""
diff --git a/homeassistant/components/broadlink/device.py b/homeassistant/components/broadlink/device.py
index 082af07ebbd045..75b6236a4731ef 100644
--- a/homeassistant/components/broadlink/device.py
+++ b/homeassistant/components/broadlink/device.py
@@ -3,6 +3,7 @@
 from contextlib import suppress
 from functools import partial
 import logging
+from typing import Generic
 
 import broadlink as blk
 from broadlink.exceptions import (
@@ -12,6 +13,7 @@
     ConnectionClosedError,
     NetworkTimeoutError,
 )
+from typing_extensions import TypeVar
 
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
@@ -29,6 +31,8 @@
 from .const import DEFAULT_PORT, DOMAIN, DOMAINS_AND_TYPES
 from .updater import BroadlinkUpdateManager, get_update_manager
 
+_ApiT = TypeVar("_ApiT", bound=blk.Device, default=blk.Device)
+
 _LOGGER = logging.getLogger(__name__)
 
 
@@ -37,7 +41,7 @@ def get_domains(device_type: str) -> set[Platform]:
     return {d for d, t in DOMAINS_AND_TYPES.items() if device_type in t}
 
 
-class BroadlinkDevice[_ApiT: blk.Device = blk.Device]:
+class BroadlinkDevice(Generic[_ApiT]):
     """Manages a Broadlink device."""
 
     api: _ApiT
diff --git a/homeassistant/components/weather/__init__.py b/homeassistant/components/weather/__init__.py
index 1333045dec8bfe..557765795ee88d 100644
--- a/homeassistant/components/weather/__init__.py
+++ b/homeassistant/components/weather/__init__.py
@@ -8,9 +8,10 @@
 from datetime import timedelta
 from functools import partial
 import logging
-from typing import Any, Final, Literal, Required, TypedDict, cast, final
+from typing import Any, Final, Generic, Literal, Required, TypedDict, cast, final
 
 from propcache import cached_property
+from typing_extensions import TypeVar
 import voluptuous as vol
 
 from homeassistant.config_entries import ConfigEntry
@@ -123,6 +124,28 @@
 
 SERVICE_GET_FORECASTS: Final = "get_forecasts"
 
+_ObservationUpdateCoordinatorT = TypeVar(
+    "_ObservationUpdateCoordinatorT",
+    bound=DataUpdateCoordinator[Any],
+    default=DataUpdateCoordinator[dict[str, Any]],
+)
+
+_DailyForecastUpdateCoordinatorT = TypeVar(
+    "_DailyForecastUpdateCoordinatorT",
+    bound=TimestampDataUpdateCoordinator[Any],
+    default=TimestampDataUpdateCoordinator[None],
+)
+_HourlyForecastUpdateCoordinatorT = TypeVar(
+    "_HourlyForecastUpdateCoordinatorT",
+    bound=TimestampDataUpdateCoordinator[Any],
+    default=_DailyForecastUpdateCoordinatorT,
+)
+_TwiceDailyForecastUpdateCoordinatorT = TypeVar(
+    "_TwiceDailyForecastUpdateCoordinatorT",
+    bound=TimestampDataUpdateCoordinator[Any],
+    default=_DailyForecastUpdateCoordinatorT,
+)
+
 # mypy: disallow-any-generics
 
 
@@ -998,22 +1021,15 @@ async def async_get_forecasts_service(
     }
 
 
-class CoordinatorWeatherEntity[
-    _ObservationUpdateCoordinatorT: DataUpdateCoordinator[Any] = DataUpdateCoordinator[
-        dict[str, Any]
-    ],
-    _DailyForecastUpdateCoordinatorT: DataUpdateCoordinator[
-        Any
-    ] = TimestampDataUpdateCoordinator[None],
-    _HourlyForecastUpdateCoordinatorT: DataUpdateCoordinator[
-        Any
-    ] = _DailyForecastUpdateCoordinatorT,
-    _TwiceDailyForecastUpdateCoordinatorT: DataUpdateCoordinator[
-        Any
-    ] = _DailyForecastUpdateCoordinatorT,
-](
+class CoordinatorWeatherEntity(
     CoordinatorEntity[_ObservationUpdateCoordinatorT],
     WeatherEntity,
+    Generic[
+        _ObservationUpdateCoordinatorT,
+        _DailyForecastUpdateCoordinatorT,
+        _HourlyForecastUpdateCoordinatorT,
+        _TwiceDailyForecastUpdateCoordinatorT,
+    ],
 ):
     """A class for weather entities using DataUpdateCoordinators."""
 
@@ -1176,11 +1192,7 @@ async def async_forecast_twice_daily(self) -> list[Forecast] | None:
         return await self._async_forecast("twice_daily")
 
 
-class SingleCoordinatorWeatherEntity[
-    _ObservationUpdateCoordinatorT: DataUpdateCoordinator[Any] = DataUpdateCoordinator[
-        dict[str, Any]
-    ]
-](
+class SingleCoordinatorWeatherEntity(
     CoordinatorWeatherEntity[
         _ObservationUpdateCoordinatorT, TimestampDataUpdateCoordinator[None]
     ],
diff --git a/homeassistant/helpers/collection.py b/homeassistant/helpers/collection.py
index 08b58aedde4fd1..86d3450c3a012f 100644
--- a/homeassistant/helpers/collection.py
+++ b/homeassistant/helpers/collection.py
@@ -11,8 +11,9 @@
 from itertools import groupby
 import logging
 from operator import attrgetter
-from typing import Any, TypedDict
+from typing import Any, Generic, TypedDict
 
+from typing_extensions import TypeVar
 import voluptuous as vol
 from voluptuous.humanize import humanize_error
 
@@ -36,6 +37,8 @@
 CHANGE_UPDATED = "updated"
 CHANGE_REMOVED = "removed"
 
+_EntityT = TypeVar("_EntityT", bound=Entity, default=Entity)
+
 
 @dataclass(slots=True)
 class CollectionChange:
@@ -445,7 +448,7 @@ async def async_load(self, data: list[dict]) -> None:
 
 
 @dataclass(slots=True, frozen=True)
-class _CollectionLifeCycle[_EntityT: Entity = Entity]:
+class _CollectionLifeCycle(Generic[_EntityT]):
     """Life cycle for a collection of entities."""
 
     domain: str
@@ -520,7 +523,7 @@ async def _collection_changed(self, change_set: Iterable[CollectionChange]) -> N
 
 
 @callback
-def sync_entity_lifecycle[_EntityT: Entity = Entity](
+def sync_entity_lifecycle(
     hass: HomeAssistant,
     domain: str,
     platform: str,
diff --git a/homeassistant/helpers/entity_component.py b/homeassistant/helpers/entity_component.py
index 02508e9ee9e708..1be7289401ccfa 100644
--- a/homeassistant/helpers/entity_component.py
+++ b/homeassistant/helpers/entity_component.py
@@ -7,7 +7,9 @@
 from datetime import timedelta
 import logging
 from types import ModuleType
-from typing import Any
+from typing import Any, Generic
+
+from typing_extensions import TypeVar
 
 from homeassistant import config as conf_util
 from homeassistant.config_entries import ConfigEntry
@@ -37,6 +39,8 @@
 DEFAULT_SCAN_INTERVAL = timedelta(seconds=15)
 DATA_INSTANCES = "entity_components"
 
+_EntityT = TypeVar("_EntityT", bound=entity.Entity, default=entity.Entity)
+
 
 @bind_hass
 async def async_update_entity(hass: HomeAssistant, entity_id: str) -> None:
@@ -60,7 +64,7 @@ async def async_update_entity(hass: HomeAssistant, entity_id: str) -> None:
     await entity_obj.async_update_ha_state(True)
 
 
-class EntityComponent[_EntityT: entity.Entity = entity.Entity]:
+class EntityComponent(Generic[_EntityT]):
     """The EntityComponent manages platforms that manage entities.
 
     An example of an entity component is 'light', which manages platforms such
diff --git a/homeassistant/helpers/update_coordinator.py b/homeassistant/helpers/update_coordinator.py
index d86e995ad3bf80..6cc4584935e5f4 100644
--- a/homeassistant/helpers/update_coordinator.py
+++ b/homeassistant/helpers/update_coordinator.py
@@ -37,6 +37,11 @@
 REQUEST_REFRESH_DEFAULT_IMMEDIATE = True
 
 _DataT = TypeVar("_DataT", default=dict[str, Any])
+_DataUpdateCoordinatorT = TypeVar(
+    "_DataUpdateCoordinatorT",
+    bound="DataUpdateCoordinator[Any]",
+    default="DataUpdateCoordinator[dict[str, Any]]",
+)
 
 
 class UpdateFailed(HomeAssistantError):
@@ -560,11 +565,7 @@ async def async_update(self) -> None:
         """
 
 
-class CoordinatorEntity[
-    _DataUpdateCoordinatorT: DataUpdateCoordinator[Any] = DataUpdateCoordinator[
-        dict[str, Any]
-    ]
-](BaseCoordinatorEntity[_DataUpdateCoordinatorT]):
+class CoordinatorEntity(BaseCoordinatorEntity[_DataUpdateCoordinatorT]):
     """A class for entities using DataUpdateCoordinator."""
 
     def __init__(
diff --git a/homeassistant/util/event_type.py b/homeassistant/util/event_type.py
index e008305727275b..509a35d33ae2a9 100644
--- a/homeassistant/util/event_type.py
+++ b/homeassistant/util/event_type.py
@@ -6,10 +6,14 @@
 from __future__ import annotations
 
 from collections.abc import Mapping
-from typing import Any
+from typing import Any, Generic
 
+from typing_extensions import TypeVar
 
-class EventType[_DataT: Mapping[str, Any] = Mapping[str, Any]](str):
+_DataT = TypeVar("_DataT", bound=Mapping[str, Any], default=Mapping[str, Any])
+
+
+class EventType(str, Generic[_DataT]):
     """Custom type for Event.event_type.
 
     At runtime this is a generic subclass of str.
diff --git a/homeassistant/util/event_type.pyi b/homeassistant/util/event_type.pyi
index 7536babbcb9a6e..4285e54e8c98b1 100644
--- a/homeassistant/util/event_type.pyi
+++ b/homeassistant/util/event_type.pyi
@@ -2,13 +2,17 @@
 # ruff: noqa: PYI021  # Allow docstrings
 
 from collections.abc import Mapping
-from typing import Any
+from typing import Any, Generic
+
+from typing_extensions import TypeVar
 
 __all__ = [
     "EventType",
 ]
 
-class EventType[_DataT: Mapping[str, Any] = Mapping[str, Any]]:
+_DataT = TypeVar("_DataT", bound=Mapping[str, Any], default=Mapping[str, Any])
+
+class EventType(Generic[_DataT]):
     """Custom type for Event.event_type. At runtime delegated to str.
 
     For type checkers pretend to be its own separate class.
diff --git a/tests/common.py b/tests/common.py
index a1492df5dac0a6..ac6f10b8c44ef8 100644
--- a/tests/common.py
+++ b/tests/common.py
@@ -31,6 +31,7 @@
 from aiohttp.test_utils import unused_port as get_test_instance_port  # noqa: F401
 import pytest
 from syrupy import SnapshotAssertion
+from typing_extensions import TypeVar
 import voluptuous as vol
 
 from homeassistant import auth, bootstrap, config_entries, loader
@@ -113,6 +114,8 @@
     import_deprecated_constant,
 )
 
+_DataT = TypeVar("_DataT", bound=Mapping[str, Any], default=dict[str, Any])
+
 _LOGGER = logging.getLogger(__name__)
 INSTANCES = []
 CLIENT_ID = "https://example.com/app"
@@ -1534,7 +1537,7 @@ def mock_platform(
     module_cache[platform_path] = module or Mock()
 
 
-def async_capture_events[_DataT: Mapping[str, Any] = dict[str, Any]](
+def async_capture_events(
     hass: HomeAssistant, event_name: EventType[_DataT] | str
 ) -> list[Event[_DataT]]:
     """Create a helper that captures events."""