diff --git a/homeassistant/auth/mfa_modules/__init__.py b/homeassistant/auth/mfa_modules/__init__.py
index d0cb190ec6e..0edc187e24d 100644
--- a/homeassistant/auth/mfa_modules/__init__.py
+++ b/homeassistant/auth/mfa_modules/__init__.py
@@ -4,7 +4,7 @@ from __future__ import annotations
 
 import logging
 import types
-from typing import Any, Generic, TypeVar
+from typing import Any
 
 import voluptuous as vol
 from voluptuous.humanize import humanize_error
@@ -34,12 +34,6 @@ DATA_REQS: HassKey[set[str]] = HassKey("mfa_auth_module_reqs_processed")
 
 _LOGGER = logging.getLogger(__name__)
 
-_MultiFactorAuthModuleT = TypeVar(
-    "_MultiFactorAuthModuleT",
-    bound="MultiFactorAuthModule",
-    default="MultiFactorAuthModule",
-)
-
 
 class MultiFactorAuthModule:
     """Multi-factor Auth Module of validation function."""
@@ -101,7 +95,9 @@ class MultiFactorAuthModule:
         raise NotImplementedError
 
 
-class SetupFlow(data_entry_flow.FlowHandler, Generic[_MultiFactorAuthModuleT]):
+class SetupFlow[_MultiFactorAuthModuleT: MultiFactorAuthModule = MultiFactorAuthModule](
+    data_entry_flow.FlowHandler
+):
     """Handler for the setup flow."""
 
     def __init__(
diff --git a/homeassistant/auth/providers/__init__.py b/homeassistant/auth/providers/__init__.py
index 36faf0e5e9c..1155e77b407 100644
--- a/homeassistant/auth/providers/__init__.py
+++ b/homeassistant/auth/providers/__init__.py
@@ -5,7 +5,7 @@ from __future__ import annotations
 from collections.abc import Mapping
 import logging
 import types
-from typing import Any, Generic, TypeVar
+from typing import Any
 
 import voluptuous as vol
 from voluptuous.humanize import humanize_error
@@ -46,8 +46,6 @@ AUTH_PROVIDER_SCHEMA = vol.Schema(
     extra=vol.ALLOW_EXTRA,
 )
 
-_AuthProviderT = TypeVar("_AuthProviderT", bound="AuthProvider", default="AuthProvider")
-
 
 class AuthProvider:
     """Provider of user authentication."""
@@ -194,9 +192,8 @@ async def load_auth_provider_module(
     return module
 
 
-class LoginFlow(
+class LoginFlow[_AuthProviderT: AuthProvider = AuthProvider](
     FlowHandler[AuthFlowContext, AuthFlowResult, tuple[str, str]],
-    Generic[_AuthProviderT],
 ):
     """Handler for the login flow."""
 
diff --git a/homeassistant/components/bluetooth/passive_update_coordinator.py b/homeassistant/components/bluetooth/passive_update_coordinator.py
index c20f55abcee..ccff85e5027 100644
--- a/homeassistant/components/bluetooth/passive_update_coordinator.py
+++ b/homeassistant/components/bluetooth/passive_update_coordinator.py
@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any, TypeVar
+from typing import TYPE_CHECKING, Any
 
 from homeassistant.core import CALLBACK_TYPE, HomeAssistant, callback
 from homeassistant.helpers.update_coordinator import (
@@ -18,12 +18,6 @@ if TYPE_CHECKING:
 
     from . import BluetoothChange, BluetoothScanningMode, BluetoothServiceInfoBleak
 
-_PassiveBluetoothDataUpdateCoordinatorT = TypeVar(
-    "_PassiveBluetoothDataUpdateCoordinatorT",
-    bound="PassiveBluetoothDataUpdateCoordinator",
-    default="PassiveBluetoothDataUpdateCoordinator",
-)
-
 
 class PassiveBluetoothDataUpdateCoordinator(
     BasePassiveBluetoothCoordinator, BaseDataUpdateCoordinatorProtocol
@@ -96,7 +90,9 @@ class PassiveBluetoothDataUpdateCoordinator(
         self.async_update_listeners()
 
 
-class PassiveBluetoothCoordinatorEntity(  # pylint: disable=hass-enforce-class-module
+class PassiveBluetoothCoordinatorEntity[
+    _PassiveBluetoothDataUpdateCoordinatorT: PassiveBluetoothDataUpdateCoordinator = PassiveBluetoothDataUpdateCoordinator
+](  # 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 ac90dd9af79..082af07ebbd 100644
--- a/homeassistant/components/broadlink/device.py
+++ b/homeassistant/components/broadlink/device.py
@@ -3,7 +3,6 @@
 from contextlib import suppress
 from functools import partial
 import logging
-from typing import Generic, TypeVar
 
 import broadlink as blk
 from broadlink.exceptions import (
@@ -30,8 +29,6 @@ from homeassistant.helpers import device_registry as dr
 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__)
 
 
@@ -40,7 +37,7 @@ 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(Generic[_ApiT]):
+class BroadlinkDevice[_ApiT: blk.Device = blk.Device]:
     """Manages a Broadlink device."""
 
     api: _ApiT
diff --git a/homeassistant/components/reolink/util.py b/homeassistant/components/reolink/util.py
index bf7018dfba2..e43391f19fb 100644
--- a/homeassistant/components/reolink/util.py
+++ b/homeassistant/components/reolink/util.py
@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from collections.abc import Awaitable, Callable, Coroutine
 from dataclasses import dataclass
-from typing import Any, ParamSpec, TypeVar
+from typing import Any
 
 from reolink_aio.exceptions import (
     ApiError,
@@ -87,17 +87,13 @@ def get_device_uid_and_ch(
     return (device_uid, ch, is_chime)
 
 
-T = TypeVar("T")
-P = ParamSpec("P")
-
-
 # Decorators
-def raise_translated_error(
-    func: Callable[P, Awaitable[T]],
-) -> Callable[P, Coroutine[Any, Any, T]]:
+def raise_translated_error[**P, R](
+    func: Callable[P, Awaitable[R]],
+) -> Callable[P, Coroutine[Any, Any, R]]:
     """Wrap a reolink-aio function to translate any potential errors."""
 
-    async def decorator_raise_translated_error(*args: P.args, **kwargs: P.kwargs) -> T:
+    async def decorator_raise_translated_error(*args: P.args, **kwargs: P.kwargs) -> R:
         """Try a reolink-aio function and translate any potential errors."""
         try:
             return await func(*args, **kwargs)
diff --git a/homeassistant/config_entries.py b/homeassistant/config_entries.py
index 930b3242aad..5a0f99df5ee 100644
--- a/homeassistant/config_entries.py
+++ b/homeassistant/config_entries.py
@@ -22,7 +22,7 @@ from functools import cache
 import logging
 from random import randint
 from types import MappingProxyType
-from typing import TYPE_CHECKING, Any, Generic, Self, TypeVar, cast
+from typing import TYPE_CHECKING, Any, Self, cast
 
 from async_interrupt import interrupt
 from propcache import cached_property
@@ -136,8 +136,6 @@ DISCOVERY_COOLDOWN = 1
 ISSUE_UNIQUE_ID_COLLISION = "config_entry_unique_id_collision"
 UNIQUE_ID_COLLISION_TITLE_LIMIT = 5
 
-_DataT = TypeVar("_DataT", default=Any)
-
 
 class ConfigEntryState(Enum):
     """Config entry state."""
@@ -312,7 +310,7 @@ def _validate_item(*, disabled_by: ConfigEntryDisabler | Any | None = None) -> N
         )
 
 
-class ConfigEntry(Generic[_DataT]):
+class ConfigEntry[_DataT = Any]:
     """Hold a configuration entry."""
 
     entry_id: str
diff --git a/homeassistant/helpers/collection.py b/homeassistant/helpers/collection.py
index 1b01f1c3f5b..08b58aedde4 100644
--- a/homeassistant/helpers/collection.py
+++ b/homeassistant/helpers/collection.py
@@ -11,7 +11,7 @@ from hashlib import md5
 from itertools import groupby
 import logging
 from operator import attrgetter
-from typing import Any, Generic, TypedDict, TypeVar
+from typing import Any, TypedDict
 
 import voluptuous as vol
 from voluptuous.humanize import humanize_error
@@ -36,8 +36,6 @@ CHANGE_ADDED = "added"
 CHANGE_UPDATED = "updated"
 CHANGE_REMOVED = "removed"
 
-_EntityT = TypeVar("_EntityT", bound=Entity, default=Entity)
-
 
 @dataclass(slots=True)
 class CollectionChange:
@@ -447,7 +445,7 @@ _GROUP_BY_KEY = attrgetter("change_type")
 
 
 @dataclass(slots=True, frozen=True)
-class _CollectionLifeCycle(Generic[_EntityT]):
+class _CollectionLifeCycle[_EntityT: Entity = Entity]:
     """Life cycle for a collection of entities."""
 
     domain: str
@@ -522,7 +520,7 @@ class _CollectionLifeCycle(Generic[_EntityT]):
 
 
 @callback
-def sync_entity_lifecycle(
+def sync_entity_lifecycle[_EntityT: Entity = Entity](
     hass: HomeAssistant,
     domain: str,
     platform: str,
diff --git a/homeassistant/helpers/entity_component.py b/homeassistant/helpers/entity_component.py
index de20a257a9f..02508e9ee9e 100644
--- a/homeassistant/helpers/entity_component.py
+++ b/homeassistant/helpers/entity_component.py
@@ -7,7 +7,7 @@ from collections.abc import Callable, Iterable
 from datetime import timedelta
 import logging
 from types import ModuleType
-from typing import Any, Generic, TypeVar
+from typing import Any
 
 from homeassistant import config as conf_util
 from homeassistant.config_entries import ConfigEntry
@@ -37,8 +37,6 @@ from .typing import ConfigType, DiscoveryInfoType, VolDictType, VolSchemaType
 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:
@@ -62,7 +60,7 @@ async def async_update_entity(hass: HomeAssistant, entity_id: str) -> None:
     await entity_obj.async_update_ha_state(True)
 
 
-class EntityComponent(Generic[_EntityT]):
+class EntityComponent[_EntityT: entity.Entity = entity.Entity]:
     """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 039fbac5787..8acd43970f9 100644
--- a/homeassistant/helpers/update_coordinator.py
+++ b/homeassistant/helpers/update_coordinator.py
@@ -36,11 +36,6 @@ REQUEST_REFRESH_DEFAULT_COOLDOWN = 10
 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):
@@ -564,7 +559,11 @@ class BaseCoordinatorEntity[
         """
 
 
-class CoordinatorEntity(BaseCoordinatorEntity[_DataUpdateCoordinatorT]):
+class CoordinatorEntity[
+    _DataUpdateCoordinatorT: DataUpdateCoordinator[Any] = DataUpdateCoordinator[
+        dict[str, Any]
+    ]
+](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 7755a45d3b9..e0083057272 100644
--- a/homeassistant/util/event_type.py
+++ b/homeassistant/util/event_type.py
@@ -6,12 +6,10 @@ Custom for type checking. See stub file.
 from __future__ import annotations
 
 from collections.abc import Mapping
-from typing import Any, Generic, TypeVar
-
-_DataT = TypeVar("_DataT", bound=Mapping[str, Any], default=Mapping[str, Any])
+from typing import Any
 
 
-class EventType(str, Generic[_DataT]):
+class EventType[_DataT: Mapping[str, Any] = Mapping[str, Any]](str):
     """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 d3adb8a1c54..f9cb140440f 100644
--- a/homeassistant/util/event_type.pyi
+++ b/homeassistant/util/event_type.pyi
@@ -8,7 +8,9 @@ __all__ = [
     "EventType",
 ]
 
-_DataT = TypeVar("_DataT", bound=Mapping[str, Any], default=Mapping[str, Any])
+_DataT = TypeVar(  # needs to be invariant
+    "_DataT", bound=Mapping[str, Any], default=Mapping[str, Any]
+)
 
 class EventType(Generic[_DataT]):
     """Custom type for Event.event_type. At runtime delegated to str.
diff --git a/tests/common.py b/tests/common.py
index d9315ef074f..cb4706a97b8 100644
--- a/tests/common.py
+++ b/tests/common.py
@@ -25,7 +25,7 @@ import os
 import pathlib
 import time
 from types import FrameType, ModuleType
-from typing import Any, Literal, NoReturn, TypeVar
+from typing import Any, Literal, NoReturn
 from unittest.mock import AsyncMock, Mock, patch
 
 from aiohttp.test_utils import unused_port as get_test_instance_port  # noqa: F401
@@ -113,8 +113,6 @@ from .testing_config.custom_components.test_constant_deprecation import (
     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"
@@ -1544,7 +1542,7 @@ def mock_platform(
     module_cache[platform_path] = module or Mock()
 
 
-def async_capture_events(
+def async_capture_events[_DataT: Mapping[str, Any] = dict[str, Any]](
     hass: HomeAssistant, event_name: EventType[_DataT] | str
 ) -> list[Event[_DataT]]:
     """Create a helper that captures events."""