diff --git a/stdlib/annotationlib.pyi b/stdlib/annotationlib.pyi
index c87f4ec6d..3679dc29d 100644
--- a/stdlib/annotationlib.pyi
+++ b/stdlib/annotationlib.pyi
@@ -28,6 +28,20 @@ if sys.version_info >= (3, 14):
 
     @final
     class ForwardRef:
+        __slots__ = (
+            "__forward_is_argument__",
+            "__forward_is_class__",
+            "__forward_module__",
+            "__weakref__",
+            "__arg__",
+            "__globals__",
+            "__extra_names__",
+            "__code__",
+            "__ast_node__",
+            "__cell__",
+            "__owner__",
+            "__stringifier_dict__",
+        )
         __forward_is_argument__: bool
         __forward_is_class__: bool
         __forward_module__: str | None
diff --git a/stdlib/argparse.pyi b/stdlib/argparse.pyi
index 8a8cc047f..bce20e092 100644
--- a/stdlib/argparse.pyi
+++ b/stdlib/argparse.pyi
@@ -154,7 +154,7 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
             exit_on_error: bool = True,
             *,
             suggest_on_error: bool = False,
-            color: bool = False,
+            color: bool = True,
         ) -> None: ...
     else:
         def __init__(
diff --git a/stdlib/compression/zstd/__init__.pyi b/stdlib/compression/zstd/__init__.pyi
index 24a9633c4..d5da4be03 100644
--- a/stdlib/compression/zstd/__init__.pyi
+++ b/stdlib/compression/zstd/__init__.pyi
@@ -35,6 +35,7 @@ zstd_version_info: Final[tuple[int, int, int]]
 COMPRESSION_LEVEL_DEFAULT: Final = _zstd.ZSTD_CLEVEL_DEFAULT
 
 class FrameInfo:
+    __slots__ = ("decompressed_size", "dictionary_id")
     decompressed_size: int
     dictionary_id: int
     def __init__(self, decompressed_size: int, dictionary_id: int) -> None: ...
diff --git a/stdlib/concurrent/interpreters/_crossinterp.pyi b/stdlib/concurrent/interpreters/_crossinterp.pyi
index b073aefa7..7cf1ea347 100644
--- a/stdlib/concurrent/interpreters/_crossinterp.pyi
+++ b/stdlib/concurrent/interpreters/_crossinterp.pyi
@@ -12,6 +12,7 @@ if sys.version_info >= (3, 13):  # needed to satisfy pyright checks for Python <
     classonly = classmethod
 
     class UnboundItem:
+        __slots__ = ()
         def __new__(cls) -> Never: ...
         @classonly
         def singleton(cls, kind: str, module: str, name: str = "UNBOUND") -> Self: ...
diff --git a/stdlib/concurrent/interpreters/_queues.pyi b/stdlib/concurrent/interpreters/_queues.pyi
index 39a057ee9..7493f8780 100644
--- a/stdlib/concurrent/interpreters/_queues.pyi
+++ b/stdlib/concurrent/interpreters/_queues.pyi
@@ -51,8 +51,8 @@ if sys.version_info >= (3, 13):  # needed to satisfy pyright checks for Python <
             timeout: SupportsIndex | None = None,
             *,
             unbounditems: _AnyUnbound | None = None,
-            _delay: float = ...,
+            _delay: float = 0.01,
         ) -> None: ...
         def put_nowait(self, obj: object, *, unbounditems: _AnyUnbound | None = None) -> None: ...
-        def get(self, timeout: SupportsIndex | None = None, *, _delay: float = ...) -> object: ...
+        def get(self, timeout: SupportsIndex | None = None, *, _delay: float = 0.01) -> object: ...
         def get_nowait(self) -> object: ...
diff --git a/stdlib/io.pyi b/stdlib/io.pyi
index 1313df183..d301d700e 100644
--- a/stdlib/io.pyi
+++ b/stdlib/io.pyi
@@ -67,7 +67,9 @@ class TextIOBase(_TextIOBase, IOBase): ...
 
 if sys.version_info >= (3, 14):
     class Reader(Protocol[_T_co]):
+        __slots__ = ()
         def read(self, size: int = ..., /) -> _T_co: ...
 
     class Writer(Protocol[_T_contra]):
+        __slots__ = ()
         def write(self, data: _T_contra, /) -> int: ...
diff --git a/stdlib/pdb.pyi b/stdlib/pdb.pyi
index fb6c486ab..0c16f48e2 100644
--- a/stdlib/pdb.pyi
+++ b/stdlib/pdb.pyi
@@ -131,7 +131,11 @@ class Pdb(Bdb, Cmd):
         def completedefault(self, text: str, line: str, begidx: int, endidx: int) -> list[str]: ...
 
     def do_commands(self, arg: str) -> bool | None: ...
-    def do_break(self, arg: str, temporary: bool = ...) -> bool | None: ...
+    if sys.version_info >= (3, 14):
+        def do_break(self, arg: str, temporary: bool = False) -> bool | None: ...
+    else:
+        def do_break(self, arg: str, temporary: bool | Literal[0, 1] = 0) -> bool | None: ...
+
     def do_tbreak(self, arg: str) -> bool | None: ...
     def do_enable(self, arg: str) -> bool | None: ...
     def do_disable(self, arg: str) -> bool | None: ...