diff --git a/requirements-tests.txt b/requirements-tests.txt
index ac7223db9faf..2b789786d283 100644
--- a/requirements-tests.txt
+++ b/requirements-tests.txt
@@ -7,7 +7,7 @@ flake8-noqa==1.4.0       # must match .pre-commit-config.yaml
 flake8-pyi==24.4.0       # must match .pre-commit-config.yaml
 mypy==1.9.0
 pre-commit-hooks==4.5.0  # must match .pre-commit-config.yaml
-pyright==1.1.358
+pyright==1.1.359
 pytype==2024.4.11; platform_system != "Windows" and python_version < "3.12"
 ruff==0.3.7              # must match .pre-commit-config.yaml
 
diff --git a/stdlib/builtins.pyi b/stdlib/builtins.pyi
index f531c181b222..61357aa2dc2c 100644
--- a/stdlib/builtins.pyi
+++ b/stdlib/builtins.pyi
@@ -1031,15 +1031,15 @@ class dict(MutableMapping[_KT, _VT]):
     @overload
     def __init__(self) -> None: ...
     @overload
-    def __init__(self: dict[str, _VT], **kwargs: _VT) -> None: ...
+    def __init__(self: dict[str, _T], **kwargs: _T) -> None: ...
     @overload
-    def __init__(self, map: SupportsKeysAndGetItem[_KT, _VT], /) -> None: ...
+    def __init__(self: dict[_T1, _T2], map: SupportsKeysAndGetItem[_T1, _T2], /) -> None: ...
     @overload
-    def __init__(self: dict[str, _VT], map: SupportsKeysAndGetItem[str, _VT], /, **kwargs: _VT) -> None: ...
+    def __init__(self: dict[str, _T], map: SupportsKeysAndGetItem[str, _T], /, **kwargs: _T) -> None: ...
     @overload
-    def __init__(self, iterable: Iterable[tuple[_KT, _VT]], /) -> None: ...
+    def __init__(self: dict[_T1, _T2], iterable: Iterable[tuple[_T1, _T2]], /) -> None: ...
     @overload
-    def __init__(self: dict[str, _VT], iterable: Iterable[tuple[str, _VT]], /, **kwargs: _VT) -> None: ...
+    def __init__(self: dict[str, _T], iterable: Iterable[tuple[str, _T]], /, **kwargs: _T) -> None: ...
     # Next two overloads are for dict(string.split(sep) for string in iterable)
     # Cannot be Iterable[Sequence[_T]] or otherwise dict(["foo", "bar", "baz"]) is not an error
     @overload
diff --git a/stdlib/collections/__init__.pyi b/stdlib/collections/__init__.pyi
index 1d23ecd66a8d..4d2e188294fc 100644
--- a/stdlib/collections/__init__.pyi
+++ b/stdlib/collections/__init__.pyi
@@ -51,15 +51,15 @@ class UserDict(MutableMapping[_KT, _VT]):
     @overload
     def __init__(self, dict: None = None, /) -> None: ...
     @overload
-    def __init__(self: UserDict[str, _VT], dict: None = None, /, **kwargs: _VT) -> None: ...
+    def __init__(self: UserDict[str, _T], dict: None = None, /, **kwargs: _T) -> None: ...
     @overload
-    def __init__(self, dict: SupportsKeysAndGetItem[_KT, _VT], /) -> None: ...
+    def __init__(self: UserDict[_T1, _T2], dict: SupportsKeysAndGetItem[_T1, _T2], /) -> None: ...
     @overload
-    def __init__(self: UserDict[str, _VT], dict: SupportsKeysAndGetItem[str, _VT], /, **kwargs: _VT) -> None: ...
+    def __init__(self: UserDict[str, _T], dict: SupportsKeysAndGetItem[str, _T], /, **kwargs: _T) -> None: ...
     @overload
-    def __init__(self, iterable: Iterable[tuple[_KT, _VT]], /) -> None: ...
+    def __init__(self: UserDict[_T1, _T2], iterable: Iterable[tuple[_T1, _T2]], /) -> None: ...
     @overload
-    def __init__(self: UserDict[str, _VT], iterable: Iterable[tuple[str, _VT]], /, **kwargs: _VT) -> None: ...
+    def __init__(self: UserDict[str, _T], iterable: Iterable[tuple[str, _T]], /, **kwargs: _T) -> None: ...
     @overload
     def __init__(self: UserDict[str, str], iterable: Iterable[list[str]], /) -> None: ...
     @overload
@@ -389,30 +389,30 @@ class defaultdict(dict[_KT, _VT]):
     @overload
     def __init__(self) -> None: ...
     @overload
-    def __init__(self: defaultdict[str, _VT], **kwargs: _VT) -> None: ...
+    def __init__(self: defaultdict[str, _T], **kwargs: _T) -> None: ...
     @overload
-    def __init__(self, default_factory: Callable[[], _VT] | None, /) -> None: ...
+    def __init__(self: defaultdict[_KT, _T], default_factory: Callable[[], _T] | None, /) -> None: ...
     @overload
-    def __init__(self: defaultdict[str, _VT], default_factory: Callable[[], _VT] | None, /, **kwargs: _VT) -> None: ...
+    def __init__(self: defaultdict[str, _T], default_factory: Callable[[], _T] | None, /, **kwargs: _T) -> None: ...
     @overload
-    def __init__(self, default_factory: Callable[[], _VT] | None, map: SupportsKeysAndGetItem[_KT, _VT], /) -> None: ...
+    def __init__(
+        self: defaultdict[_T1, _T2], default_factory: Callable[[], _T2] | None, map: SupportsKeysAndGetItem[_T1, _T2], /
+    ) -> None: ...
     @overload
     def __init__(
-        self: defaultdict[str, _VT],
-        default_factory: Callable[[], _VT] | None,
-        map: SupportsKeysAndGetItem[str, _VT],
+        self: defaultdict[str, _T],
+        default_factory: Callable[[], _T] | None,
+        map: SupportsKeysAndGetItem[str, _T],
         /,
-        **kwargs: _VT,
+        **kwargs: _T,
     ) -> None: ...
     @overload
-    def __init__(self, default_factory: Callable[[], _VT] | None, iterable: Iterable[tuple[_KT, _VT]], /) -> None: ...
+    def __init__(
+        self: defaultdict[_T1, _T2], default_factory: Callable[[], _T2] | None, iterable: Iterable[tuple[_T1, _T2]], /
+    ) -> None: ...
     @overload
     def __init__(
-        self: defaultdict[str, _VT],
-        default_factory: Callable[[], _VT] | None,
-        iterable: Iterable[tuple[str, _VT]],
-        /,
-        **kwargs: _VT,
+        self: defaultdict[str, _T], default_factory: Callable[[], _T] | None, iterable: Iterable[tuple[str, _T]], /, **kwargs: _T
     ) -> None: ...
     def __missing__(self, key: _KT, /) -> _VT: ...
     def __copy__(self) -> Self: ...
diff --git a/stdlib/contextlib.pyi b/stdlib/contextlib.pyi
index f82bb4b7b6ad..e27d5ab6a310 100644
--- a/stdlib/contextlib.pyi
+++ b/stdlib/contextlib.pyi
@@ -29,6 +29,7 @@ if sys.version_info >= (3, 11):
     __all__ += ["chdir"]
 
 _T = TypeVar("_T")
+_T1 = TypeVar("_T1")
 _T_co = TypeVar("_T_co", covariant=True)
 _T_io = TypeVar("_T_io", bound=IO[str] | None)
 _F = TypeVar("_F", bound=Callable[..., Any])
@@ -182,7 +183,7 @@ if sys.version_info >= (3, 10):
         @overload
         def __init__(self: nullcontext[None], enter_result: None = None) -> None: ...
         @overload
-        def __init__(self: nullcontext[_T], enter_result: _T) -> None: ...
+        def __init__(self: nullcontext[_T1], enter_result: _T1) -> None: ...
         def __enter__(self) -> _T: ...
         def __exit__(self, *exctype: Unused) -> None: ...
         async def __aenter__(self) -> _T: ...
@@ -194,7 +195,7 @@ else:
         @overload
         def __init__(self: nullcontext[None], enter_result: None = None) -> None: ...
         @overload
-        def __init__(self: nullcontext[_T], enter_result: _T) -> None: ...
+        def __init__(self: nullcontext[_T1], enter_result: _T1) -> None: ...
         def __enter__(self) -> _T: ...
         def __exit__(self, *exctype: Unused) -> None: ...
 
diff --git a/stdlib/weakref.pyi b/stdlib/weakref.pyi
index 8f3ad0631c10..8b9b34dc6b1e 100644
--- a/stdlib/weakref.pyi
+++ b/stdlib/weakref.pyi
@@ -51,10 +51,10 @@ class WeakValueDictionary(MutableMapping[_KT, _VT]):
     @overload
     def __init__(self) -> None: ...
     @overload
-    def __init__(self: WeakValueDictionary[_KT, _VT], other: Mapping[_KT, _VT] | Iterable[tuple[_KT, _VT]], /) -> None: ...
+    def __init__(self: WeakValueDictionary[_T1, _T2], other: Mapping[_T1, _T2] | Iterable[tuple[_T1, _T2]], /) -> None: ...
     @overload
     def __init__(
-        self: WeakValueDictionary[str, _VT], other: Mapping[str, _VT] | Iterable[tuple[str, _VT]] = (), /, **kwargs: _VT
+        self: WeakValueDictionary[str, _T], other: Mapping[str, _T] | Iterable[tuple[str, _T]] = (), /, **kwargs: _T
     ) -> None: ...
     def __len__(self) -> int: ...
     def __getitem__(self, key: _KT) -> _VT: ...