diff --git a/stubs/mock/@tests/stubtest_allowlist.txt b/stubs/mock/@tests/stubtest_allowlist.txt
index b9f6f499c..9e0bbeef0 100644
--- a/stubs/mock/@tests/stubtest_allowlist.txt
+++ b/stubs/mock/@tests/stubtest_allowlist.txt
@@ -1,2 +1,6 @@
 mock.patch
 mock.mock.patch
+
+# Uses `_timeout_unset` sentinel:
+mock.mock.ThreadingMixin.__init__
+mock.mock.ThreadingMixin.wait_until_called
diff --git a/stubs/mock/METADATA.toml b/stubs/mock/METADATA.toml
index c98db6304..2c151642b 100644
--- a/stubs/mock/METADATA.toml
+++ b/stubs/mock/METADATA.toml
@@ -1 +1 @@
-version = "5.0.*"
+version = "5.1.*"
diff --git a/stubs/mock/mock/__init__.pyi b/stubs/mock/mock/__init__.pyi
index 9b47e2207..4fc3625d6 100644
--- a/stubs/mock/mock/__init__.pyi
+++ b/stubs/mock/mock/__init__.pyi
@@ -1,3 +1,24 @@
 from .mock import *
 
+__all__ = (
+    "__version__",
+    "version_info",
+    "Mock",
+    "MagicMock",
+    "patch",
+    "sentinel",
+    "DEFAULT",
+    "ANY",
+    "call",
+    "create_autospec",
+    "AsyncMock",
+    "ThreadingMock",
+    "FILTER_DIR",
+    "NonCallableMock",
+    "NonCallableMagicMock",
+    "mock_open",
+    "PropertyMock",
+    "seal",
+)
+__version__: str
 version_info: tuple[int, int, int]
diff --git a/stubs/mock/mock/mock.pyi b/stubs/mock/mock/mock.pyi
index 19dbf0ae1..fc09c7445 100644
--- a/stubs/mock/mock/mock.pyi
+++ b/stubs/mock/mock/mock.pyi
@@ -2,7 +2,7 @@ from _typeshed import Incomplete
 from collections.abc import Callable, Coroutine, Iterable, Mapping, Sequence
 from contextlib import AbstractContextManager
 from types import TracebackType
-from typing import Any, Generic, TypeVar, overload
+from typing import Any, ClassVar, Generic, TypeVar, overload
 from typing_extensions import Literal, ParamSpec, Self
 
 _F = TypeVar("_F", bound=Callable[..., Any])
@@ -22,6 +22,7 @@ __all__ = (
     "call",
     "create_autospec",
     "AsyncMock",
+    "ThreadingMock",
     "FILTER_DIR",
     "NonCallableMock",
     "NonCallableMagicMock",
@@ -378,3 +379,17 @@ class PropertyMock(Mock):
     def __set__(self, obj: Any, value: Any) -> None: ...
 
 def seal(mock: Any) -> None: ...
+
+class ThreadingMixin(Base):
+    DEFAULT_TIMEOUT: ClassVar[float | None]
+
+    def __init__(self, *args: Any, timeout: float | None = ..., **kwargs: Any) -> None: ...
+    def reset_mock(self, *args: Any, **kwargs: Any) -> None: ...
+    def wait_until_called(self, *, timeout: float | None = ...) -> None: ...
+    def wait_until_any_call_with(self, *args: Any, **kwargs: Any) -> None: ...
+
+class ThreadingMock(ThreadingMixin, MagicMixin, Mock):
+    # Improving the `reset_mock` signature.
+    # It is defined on `ThreadingMixin` with `*args, **kwargs`, which is not ideal.
+    # But, `NonCallableMock` super-class has the better version.
+    def reset_mock(self, visited: Any = None, *, return_value: bool = False, side_effect: bool = False) -> None: ...