diff --git a/homeassistant/components/diagnostics/util.py b/homeassistant/components/diagnostics/util.py
index ba4f3d20f9a..8db2399fd53 100644
--- a/homeassistant/components/diagnostics/util.py
+++ b/homeassistant/components/diagnostics/util.py
@@ -8,7 +8,7 @@ from homeassistant.core import callback
 
 from .const import REDACTED
 
-T = TypeVar("T")
+_T = TypeVar("_T")
 
 
 @overload
@@ -17,18 +17,18 @@ def async_redact_data(data: Mapping, to_redact: Iterable[Any]) -> dict:  # type:
 
 
 @overload
-def async_redact_data(data: T, to_redact: Iterable[Any]) -> T:
+def async_redact_data(data: _T, to_redact: Iterable[Any]) -> _T:
     ...
 
 
 @callback
-def async_redact_data(data: T, to_redact: Iterable[Any]) -> T:
+def async_redact_data(data: _T, to_redact: Iterable[Any]) -> _T:
     """Redact sensitive data in a dict."""
     if not isinstance(data, (Mapping, list)):
         return data
 
     if isinstance(data, list):
-        return cast(T, [async_redact_data(val, to_redact) for val in data])
+        return cast(_T, [async_redact_data(val, to_redact) for val in data])
 
     redacted = {**data}
 
@@ -40,4 +40,4 @@ def async_redact_data(data: T, to_redact: Iterable[Any]) -> T:
         elif isinstance(value, list):
             redacted[key] = [async_redact_data(item, to_redact) for item in value]
 
-    return cast(T, redacted)
+    return cast(_T, redacted)
diff --git a/homeassistant/core.py b/homeassistant/core.py
index 8c662afce48..11d90d6d05b 100644
--- a/homeassistant/core.py
+++ b/homeassistant/core.py
@@ -99,15 +99,13 @@ STAGE_3_SHUTDOWN_TIMEOUT = 30
 
 block_async_io.enable()
 
-T = TypeVar("T")
+_T = TypeVar("_T")
 _R = TypeVar("_R")
 _R_co = TypeVar("_R_co", covariant=True)  # pylint: disable=invalid-name
 # Internal; not helpers.typing.UNDEFINED due to circular dependency
 _UNDEF: dict[Any, Any] = {}
-# pylint: disable=invalid-name
-CALLABLE_T = TypeVar("CALLABLE_T", bound=Callable[..., Any])
-CALLBACK_TYPE = Callable[[], None]
-# pylint: enable=invalid-name
+_CallableT = TypeVar("_CallableT", bound=Callable[..., Any])
+CALLBACK_TYPE = Callable[[], None]  # pylint: disable=invalid-name
 
 CORE_STORAGE_KEY = "core.config"
 CORE_STORAGE_VERSION = 1
@@ -165,7 +163,7 @@ def valid_state(state: str) -> bool:
     return len(state) <= MAX_LENGTH_STATE_STATE
 
 
-def callback(func: CALLABLE_T) -> CALLABLE_T:
+def callback(func: _CallableT) -> _CallableT:
     """Annotation to mark method as safe to call from within the event loop."""
     setattr(func, "_hass_callback", True)
     return func
@@ -480,8 +478,8 @@ class HomeAssistant:
 
     @callback
     def async_add_executor_job(
-        self, target: Callable[..., T], *args: Any
-    ) -> asyncio.Future[T]:
+        self, target: Callable[..., _T], *args: Any
+    ) -> asyncio.Future[_T]:
         """Add an executor job from within the event loop."""
         task = self.loop.run_in_executor(None, target, *args)
 
diff --git a/homeassistant/loader.py b/homeassistant/loader.py
index 8e4521eddba..be70dc50f0c 100644
--- a/homeassistant/loader.py
+++ b/homeassistant/loader.py
@@ -35,9 +35,7 @@ from .util.async_ import gather_with_concurrency
 if TYPE_CHECKING:
     from .core import HomeAssistant
 
-CALLABLE_T = TypeVar(  # pylint: disable=invalid-name
-    "CALLABLE_T", bound=Callable[..., Any]
-)
+_CallableT = TypeVar("_CallableT", bound=Callable[..., Any])
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -805,7 +803,7 @@ class Helpers:
         return wrapped
 
 
-def bind_hass(func: CALLABLE_T) -> CALLABLE_T:
+def bind_hass(func: _CallableT) -> _CallableT:
     """Decorate function to indicate that first argument is hass."""
     setattr(func, "__bind_hass", True)
     return func
diff --git a/homeassistant/scripts/benchmark/__init__.py b/homeassistant/scripts/benchmark/__init__.py
index c57d082de61..5441d39c877 100644
--- a/homeassistant/scripts/benchmark/__init__.py
+++ b/homeassistant/scripts/benchmark/__init__.py
@@ -22,7 +22,7 @@ from homeassistant.util import dt as dt_util
 # mypy: allow-untyped-calls, allow-untyped-defs, no-check-untyped-defs
 # mypy: no-warn-return-any
 
-CALLABLE_T = TypeVar("CALLABLE_T", bound=Callable)  # pylint: disable=invalid-name
+_CallableT = TypeVar("_CallableT", bound=Callable)
 
 BENCHMARKS: dict[str, Callable] = {}
 
@@ -54,7 +54,7 @@ async def run_benchmark(bench):
     await hass.async_stop()
 
 
-def benchmark(func: CALLABLE_T) -> CALLABLE_T:
+def benchmark(func: _CallableT) -> _CallableT:
     """Decorate to mark a benchmark."""
     BENCHMARKS[func.__name__] = func
     return func
diff --git a/homeassistant/util/__init__.py b/homeassistant/util/__init__.py
index 15e9254e9d8..6562ecedb4f 100644
--- a/homeassistant/util/__init__.py
+++ b/homeassistant/util/__init__.py
@@ -15,8 +15,8 @@ import slugify as unicode_slug
 
 from .dt import as_local, utcnow
 
-T = TypeVar("T")
-U = TypeVar("U")  # pylint: disable=invalid-name
+_T = TypeVar("_T")
+_U = TypeVar("_U")
 
 RE_SANITIZE_FILENAME = re.compile(r"(~|\.\.|/|\\)")
 RE_SANITIZE_PATH = re.compile(r"(~|\.(\.)+)")
@@ -63,8 +63,8 @@ def repr_helper(inp: Any) -> str:
 
 
 def convert(
-    value: T | None, to_type: Callable[[T], U], default: U | None = None
-) -> U | None:
+    value: _T | None, to_type: Callable[[_T], _U], default: _U | None = None
+) -> _U | None:
     """Convert value to to_type, returns default if fails."""
     try:
         return default if value is None else to_type(value)
diff --git a/homeassistant/util/percentage.py b/homeassistant/util/percentage.py
index d5646b44c0f..63bf78ed1f0 100644
--- a/homeassistant/util/percentage.py
+++ b/homeassistant/util/percentage.py
@@ -3,10 +3,10 @@ from __future__ import annotations
 
 from typing import TypeVar
 
-T = TypeVar("T")
+_T = TypeVar("_T")
 
 
-def ordered_list_item_to_percentage(ordered_list: list[T], item: T) -> int:
+def ordered_list_item_to_percentage(ordered_list: list[_T], item: _T) -> int:
     """Determine the percentage of an item in an ordered list.
 
     When using this utility for fan speeds, do not include "off"
@@ -29,7 +29,7 @@ def ordered_list_item_to_percentage(ordered_list: list[T], item: T) -> int:
     return (list_position * 100) // list_len
 
 
-def percentage_to_ordered_list_item(ordered_list: list[T], percentage: int) -> T:
+def percentage_to_ordered_list_item(ordered_list: list[_T], percentage: int) -> _T:
     """Find the item that most closely matches the percentage in an ordered list.
 
     When using this utility for fan speeds, do not include "off"
diff --git a/homeassistant/util/read_only_dict.py b/homeassistant/util/read_only_dict.py
index f9cc949afdc..bb93dd41298 100644
--- a/homeassistant/util/read_only_dict.py
+++ b/homeassistant/util/read_only_dict.py
@@ -7,11 +7,11 @@ def _readonly(*args: Any, **kwargs: Any) -> Any:
     raise RuntimeError("Cannot modify ReadOnlyDict")
 
 
-Key = TypeVar("Key")
-Value = TypeVar("Value")
+_KT = TypeVar("_KT")
+_VT = TypeVar("_VT")
 
 
-class ReadOnlyDict(dict[Key, Value]):
+class ReadOnlyDict(dict[_KT, _VT]):
     """Read only version of dict that is compatible with dict types."""
 
     __setitem__ = _readonly
diff --git a/homeassistant/util/yaml/loader.py b/homeassistant/util/yaml/loader.py
index 84349ef91a9..3507ab96286 100644
--- a/homeassistant/util/yaml/loader.py
+++ b/homeassistant/util/yaml/loader.py
@@ -19,7 +19,7 @@ from .objects import Input, NodeListClass, NodeStrClass
 # mypy: allow-untyped-calls, no-warn-return-any
 
 JSON_TYPE = Union[list, dict, str]  # pylint: disable=invalid-name
-DICT_T = TypeVar("DICT_T", bound=dict)  # pylint: disable=invalid-name
+_DictT = TypeVar("_DictT", bound=dict)
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -144,8 +144,8 @@ def _add_reference(
 
 @overload
 def _add_reference(
-    obj: DICT_T, loader: SafeLineLoader, node: yaml.nodes.Node
-) -> DICT_T:
+    obj: _DictT, loader: SafeLineLoader, node: yaml.nodes.Node
+) -> _DictT:
     ...