diff --git a/newsfragments/3542.misc.rst b/newsfragments/3542.misc.rst
new file mode 100644
index 000000000..27d29ea97
--- /dev/null
+++ b/newsfragments/3542.misc.rst
@@ -0,0 +1 @@
+The typing for :ref:`async-file-objects` is now consistent about what it exposes based on what is exposed by the underlying object.
diff --git a/src/trio/_file_io.py b/src/trio/_file_io.py
index d9305ef4f..354d04838 100644
--- a/src/trio/_file_io.py
+++ b/src/trio/_file_io.py
@@ -188,7 +188,7 @@ class _CanReadLines(Protocol[AnyStr]):
         def readlines(self, hint: int = ..., /) -> list[AnyStr]: ...
 
     class _CanSeek(Protocol):
-        def seek(self, target: int, whence: int = 0, /) -> int: ...
+        def seek(self, target: int, whence: int = ..., /) -> int: ...
 
     class _CanTell(Protocol):
         def tell(self) -> int: ...
@@ -204,7 +204,7 @@ class _CanWriteLines(Protocol[T_contra]):
         def writelines(self, lines: Iterable[T_contra], /) -> None: ...
 
     class _CanPeek(Protocol[AnyStr_co]):
-        def peek(self, size: int = 0, /) -> AnyStr_co: ...
+        def peek(self, size: int = ..., /) -> AnyStr_co: ...
 
     class _CanDetach(Protocol[T_co]):
         # The T typevar will be the unbuffered/binary file this file wraps.
@@ -313,7 +313,7 @@ def buffer(self: AsyncIOWrapper[_HasBuffer]) -> BinaryIO: ...
         @property
         def raw(self: AsyncIOWrapper[_HasRaw]) -> io.RawIOBase: ...
         @property
-        def line_buffering(self: AsyncIOWrapper[_HasLineBuffering]) -> int: ...
+        def line_buffering(self: AsyncIOWrapper[_HasLineBuffering]) -> bool: ...
         @property
         def closefd(self: AsyncIOWrapper[_HasCloseFD]) -> bool: ...
         @property
@@ -334,7 +334,7 @@ async def read1(self: AsyncIOWrapper[_CanRead1], size: int | None = -1, /) -> by
         async def readall(self: AsyncIOWrapper[_CanReadAll[AnyStr]]) -> AnyStr: ...
         async def readinto(self: AsyncIOWrapper[_CanReadInto], buf: Buffer, /) -> int | None: ...
         async def readline(self: AsyncIOWrapper[_CanReadLine[AnyStr]], size: int = -1, /) -> AnyStr: ...
-        async def readlines(self: AsyncIOWrapper[_CanReadLines[AnyStr]]) -> list[AnyStr]: ...
+        async def readlines(self: AsyncIOWrapper[_CanReadLines[AnyStr]], hint: int = -1, /) -> list[AnyStr]: ...
         async def seek(self: AsyncIOWrapper[_CanSeek], target: int, whence: int = 0, /) -> int: ...
         async def tell(self: AsyncIOWrapper[_CanTell]) -> int: ...
         async def truncate(self: AsyncIOWrapper[_CanTruncate], size: int | None = None, /) -> int: ...