diff --git a/Tests/test_file_jpeg.py b/Tests/test_file_jpeg.py
index be6461c93be..f818927f6a3 100644
--- a/Tests/test_file_jpeg.py
+++ b/Tests/test_file_jpeg.py
@@ -19,7 +19,6 @@
     UnidentifiedImageError,
     features,
 )
-from PIL._typing import Buffer
 
 from .helper import (
     assert_image,
@@ -41,7 +40,6 @@
 except ImportError:
     ElementTree = None
 
-
 TEST_FILE = "Tests/images/hopper.jpg"
 
 
@@ -1066,7 +1064,7 @@ def test_eof(self, monkeypatch: pytest.MonkeyPatch) -> None:
         # the image should still end when there is no new data
         class InfiniteMockPyDecoder(ImageFile.PyDecoder):
             def decode(
-                self, buffer: Buffer | Image.SupportsArrayInterface
+                self, buffer: bytes | Image.SupportsArrayInterface
             ) -> tuple[int, int]:
                 return 0, 0
 
diff --git a/Tests/test_image_frombytes.py b/Tests/test_image_frombytes.py
index 18aa4ccf108..06b4c5b3118 100644
--- a/Tests/test_image_frombytes.py
+++ b/Tests/test_image_frombytes.py
@@ -11,7 +11,7 @@
 def test_sanity(data_type: str) -> None:
     im1 = hopper()
 
-    data: bytes | memoryview[int] = im1.tobytes()
+    data: bytes | memoryview = im1.tobytes()
     if data_type == "memoryview":
         data = memoryview(data)
     im2 = Image.frombytes(im1.mode, im1.size, data)
diff --git a/Tests/test_imagefile.py b/Tests/test_imagefile.py
index ec3cdfaec4e..7dfb3abf986 100644
--- a/Tests/test_imagefile.py
+++ b/Tests/test_imagefile.py
@@ -14,7 +14,6 @@
     _binary,
     features,
 )
-from PIL._typing import Buffer
 
 from .helper import (
     assert_image,
@@ -239,7 +238,7 @@ def __init__(self, mode: str, *args: Any) -> None:
 
         super().__init__(mode, *args)
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         # eof
         return -1, 0
 
diff --git a/Tests/test_imagewin.py b/Tests/test_imagewin.py
index 505dcbe8e68..36df32aff66 100644
--- a/Tests/test_imagewin.py
+++ b/Tests/test_imagewin.py
@@ -116,7 +116,7 @@ def test_dib_frombytes_tobytes_roundtrip(self) -> None:
 
         # Act
         # Make one the same as the using tobytes()/frombytes()
-        test_buffer: bytes | memoryview[int] = dib1.tobytes()
+        test_buffer: bytes | memoryview = dib1.tobytes()
         for datatype in ("bytes", "memoryview"):
             if datatype == "memoryview":
                 test_buffer = memoryview(test_buffer)
diff --git a/Tests/test_qt_image_toqimage.py b/Tests/test_qt_image_toqimage.py
index 5647847d427..0004b552153 100644
--- a/Tests/test_qt_image_toqimage.py
+++ b/Tests/test_qt_image_toqimage.py
@@ -10,15 +10,13 @@
 if TYPE_CHECKING:
     from pathlib import Path
 
-    QImage = type
-else:
-    if ImageQt.qt_is_installed:
-        from PIL.ImageQt import QImage
-
 pytestmark = pytest.mark.skipif(
     not ImageQt.qt_is_installed, reason="Qt bindings are not installed"
 )
 
+if ImageQt.qt_is_installed:
+    from PIL.ImageQt import QImage
+
 
 @pytest.mark.parametrize("mode", ("RGB", "RGBA", "L", "P", "1"))
 def test_sanity(mode: str, tmp_path: Path) -> None:
diff --git a/docs/example/DdsImagePlugin.py b/docs/example/DdsImagePlugin.py
index 7a054dcca5e..e0557976c28 100644
--- a/docs/example/DdsImagePlugin.py
+++ b/docs/example/DdsImagePlugin.py
@@ -14,16 +14,10 @@
 
 import struct
 from io import BytesIO
+from typing import IO
 
 from PIL import Image, ImageFile
 
-TYPE_CHECKING = False
-if TYPE_CHECKING:
-    from typing import IO
-
-    from typing_extensions import Buffer
-
-
 # Magic ("DDS ")
 DDS_MAGIC = 0x20534444
 
@@ -264,7 +258,7 @@ def load_seek(self, pos: int) -> None:
 class DXT1Decoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         assert self.fd is not None
         try:
             self.set_as_raw(_dxt1(self.fd, self.state.xsize, self.state.ysize))
@@ -277,7 +271,7 @@ def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, in
 class DXT5Decoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         assert self.fd is not None
         try:
             self.set_as_raw(_dxt5(self.fd, self.state.xsize, self.state.ysize))
diff --git a/src/PIL/BlpImagePlugin.py b/src/PIL/BlpImagePlugin.py
index 11139c3522d..6bb92edf891 100644
--- a/src/PIL/BlpImagePlugin.py
+++ b/src/PIL/BlpImagePlugin.py
@@ -39,7 +39,6 @@
 from typing import IO
 
 from . import Image, ImageFile
-from ._typing import Buffer
 
 
 class Format(IntEnum):
@@ -296,7 +295,7 @@ def _open(self) -> None:
 class _BLPBaseDecoder(abc.ABC, ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         try:
             self._read_header()
             self._load()
diff --git a/src/PIL/BmpImagePlugin.py b/src/PIL/BmpImagePlugin.py
index 810c19d2504..a1227137017 100644
--- a/src/PIL/BmpImagePlugin.py
+++ b/src/PIL/BmpImagePlugin.py
@@ -33,7 +33,6 @@
 from ._binary import o8
 from ._binary import o16le as o16
 from ._binary import o32le as o32
-from ._typing import Buffer
 
 #
 # --------------------------------------------------------------------
@@ -328,7 +327,7 @@ def _open(self) -> None:
 class BmpRleDecoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         assert self.fd is not None
         rle4 = self.args[1]
         data = bytearray()
diff --git a/src/PIL/DdsImagePlugin.py b/src/PIL/DdsImagePlugin.py
index 4a61759f61e..312f602a6b1 100644
--- a/src/PIL/DdsImagePlugin.py
+++ b/src/PIL/DdsImagePlugin.py
@@ -21,7 +21,6 @@
 from ._binary import i32le as i32
 from ._binary import o8
 from ._binary import o32le as o32
-from ._typing import Buffer
 
 # Magic ("DDS ")
 DDS_MAGIC = 0x20534444
@@ -489,7 +488,7 @@ def load_seek(self, pos: int) -> None:
 class DdsRgbDecoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         assert self.fd is not None
         bitcount, masks = self.args
 
diff --git a/src/PIL/FitsImagePlugin.py b/src/PIL/FitsImagePlugin.py
index 943dd62c580..a3fdc0efeec 100644
--- a/src/PIL/FitsImagePlugin.py
+++ b/src/PIL/FitsImagePlugin.py
@@ -14,7 +14,6 @@
 import math
 
 from . import Image, ImageFile
-from ._typing import Buffer
 
 
 def _accept(prefix: bytes) -> bool:
@@ -127,7 +126,7 @@ def _parse_headers(
 class FitsGzipDecoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         assert self.fd is not None
         value = gzip.decompress(self.fd.read())
 
diff --git a/src/PIL/GifImagePlugin.py b/src/PIL/GifImagePlugin.py
index 64378d52a8e..76a0d4ab99f 100644
--- a/src/PIL/GifImagePlugin.py
+++ b/src/PIL/GifImagePlugin.py
@@ -52,6 +52,7 @@
     from typing import IO, Literal
 
     from . import _imaging
+    from ._typing import Buffer
 
 
 class LoadingStrategy(IntEnum):
@@ -1187,7 +1188,7 @@ def getdata(
     class Collector(BytesIO):
         data = []
 
-        def write(self, data: bytes) -> int:  # type: ignore[override]
+        def write(self, data: Buffer) -> int:
             self.data.append(data)
             return len(data)
 
diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index 394b333abba..6d79e280677 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -88,45 +88,37 @@ class DecompressionBombError(Exception):
 MAX_IMAGE_PIXELS: int | None = int(1024 * 1024 * 1024 // 4 // 3)
 
 
-if TYPE_CHECKING:
-    from . import _imaging
-
-    # mypy will not recognize `core` as a public symbol when imported as
-    # `from . import _imaging as core`
-    core = _imaging
-else:
-    try:
-        # If the _imaging C module is not present, Pillow will not load.
-        # Note that other modules should not refer to _imaging directly;
-        # import Image and use the Image.core variable instead.
-        # Also note that Image.core is not a publicly documented interface,
-        # and should be considered private and subject to change.
-        from . import _imaging as core
-
-        if __version__ != getattr(core, "PILLOW_VERSION", None):
-            msg = (
-                f"The _imaging extension was built for another version of Pillow or "
-                f"PIL:\n "
-                f"Core version: {getattr(core, 'PILLOW_VERSION', None)}\n"
-                f"Pillow version: {__version__}"
-            )
-            raise ImportError(msg)
+try:
+    # If the _imaging C module is not present, Pillow will not load.
+    # Note that other modules should not refer to _imaging directly;
+    # import Image and use the Image.core variable instead.
+    # Also note that Image.core is not a publicly documented interface,
+    # and should be considered private and subject to change.
+    from . import _imaging as core
+
+    if __version__ != getattr(core, "PILLOW_VERSION", None):
+        msg = (
+            "The _imaging extension was built for another version of Pillow or PIL:\n"
+            f"Core version: {getattr(core, 'PILLOW_VERSION', None)}\n"
+            f"Pillow version: {__version__}"
+        )
+        raise ImportError(msg)
 
-    except ImportError as v:
-        # Explanations for ways that we know we might have an import error
-        if str(v).startswith("Module use of python"):
-            # The _imaging C module is present, but not compiled for
-            # the right version (windows only).  Print a warning, if
-            # possible.
-            warnings.warn(
-                "The _imaging extension was built for another version of Python.",
-                RuntimeWarning,
-            )
-        elif str(v).startswith("The _imaging extension"):
-            warnings.warn(str(v), RuntimeWarning)
-        # Fail here anyway. Don't let people run with a mostly broken Pillow.
-        # see docs/porting.rst
-        raise
+except ImportError as v:
+    # Explanations for ways that we know we might have an import error
+    if str(v).startswith("Module use of python"):
+        # The _imaging C module is present, but not compiled for
+        # the right version (windows only).  Print a warning, if
+        # possible.
+        warnings.warn(
+            "The _imaging extension was built for another version of Python.",
+            RuntimeWarning,
+        )
+    elif str(v).startswith("The _imaging extension"):
+        warnings.warn(str(v), RuntimeWarning)
+    # Fail here anyway. Don't let people run with a mostly broken Pillow.
+    # see docs/porting.rst
+    raise
 
 
 #
diff --git a/src/PIL/MspImagePlugin.py b/src/PIL/MspImagePlugin.py
index 81a288858bb..277087a8677 100644
--- a/src/PIL/MspImagePlugin.py
+++ b/src/PIL/MspImagePlugin.py
@@ -31,7 +31,6 @@
 from . import Image, ImageFile
 from ._binary import i16le as i16
 from ._binary import o16le as o16
-from ._typing import Buffer
 
 #
 # read MSP files
@@ -113,7 +112,7 @@ class MspDecoder(ImageFile.PyDecoder):
 
     _pulls_fd = True
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         assert self.fd is not None
 
         img = io.BytesIO()
diff --git a/src/PIL/PdfParser.py b/src/PIL/PdfParser.py
index f537c78bb9e..1fdf6ec8d52 100644
--- a/src/PIL/PdfParser.py
+++ b/src/PIL/PdfParser.py
@@ -322,7 +322,7 @@ def __init__(self, dictionary: PdfDict, buf: Buffer) -> None:
         self.dictionary = dictionary
         self.buf = buf
 
-    def decode(self) -> Buffer:
+    def decode(self) -> bytes:
         try:
             filter = self.dictionary[b"Filter"]
         except KeyError:
diff --git a/src/PIL/PpmImagePlugin.py b/src/PIL/PpmImagePlugin.py
index 6bc5c8e0a03..5b17216156a 100644
--- a/src/PIL/PpmImagePlugin.py
+++ b/src/PIL/PpmImagePlugin.py
@@ -22,7 +22,6 @@
 from ._binary import i16be as i16
 from ._binary import o8
 from ._binary import o32le as o32
-from ._typing import Buffer
 
 #
 # --------------------------------------------------------------------
@@ -217,9 +216,8 @@ def _decode_bitonal(self) -> bytearray:
         data = bytearray()
         total_bytes = self.state.xsize * self.state.ysize
 
-        block: bytes | bytearray
         while len(data) != total_bytes:
-            block = self._read_block()  # read next block
+            block: bytes | bytearray = self._read_block()  # read next block
             if not block:
                 # eof
                 break
@@ -286,7 +284,7 @@ def _decode_blocks(self, maxval: int) -> bytearray:
                     break
         return data
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         self._comment_spans = False
         if self.mode == "1":
             data = self._decode_bitonal()
@@ -302,7 +300,7 @@ def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, in
 class PpmDecoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         assert self.fd is not None
 
         data = bytearray()
diff --git a/src/PIL/QoiImagePlugin.py b/src/PIL/QoiImagePlugin.py
index 0dd6e7416b6..f6e2e831cab 100644
--- a/src/PIL/QoiImagePlugin.py
+++ b/src/PIL/QoiImagePlugin.py
@@ -14,7 +14,6 @@
 from ._binary import i32be as i32
 from ._binary import o8
 from ._binary import o32be as o32
-from ._typing import Buffer
 
 
 def _accept(prefix: bytes) -> bool:
@@ -52,7 +51,7 @@ def _add_to_previous_pixels(self, value: bytes | bytearray) -> None:
         hash_value = (r * 3 + g * 5 + b * 7 + a * 11) % 64
         self._previously_seen_pixels[hash_value] = value
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         assert self.fd is not None
 
         self._previously_seen_pixels = {}
diff --git a/src/PIL/SgiImagePlugin.py b/src/PIL/SgiImagePlugin.py
index 336f859fb36..853022150ae 100644
--- a/src/PIL/SgiImagePlugin.py
+++ b/src/PIL/SgiImagePlugin.py
@@ -29,7 +29,6 @@
 from . import Image, ImageFile
 from ._binary import i16be as i16
 from ._binary import o8
-from ._typing import Buffer
 
 
 def _accept(prefix: bytes) -> bool:
@@ -199,7 +198,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
 class SGI16Decoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         assert self.fd is not None
         assert self.im is not None
 
diff --git a/src/PIL/XpmImagePlugin.py b/src/PIL/XpmImagePlugin.py
index 55302fab4fb..3be240fbc1a 100644
--- a/src/PIL/XpmImagePlugin.py
+++ b/src/PIL/XpmImagePlugin.py
@@ -19,7 +19,6 @@
 
 from . import Image, ImageFile, ImagePalette
 from ._binary import o8
-from ._typing import Buffer
 
 # XPM header
 xpm_head = re.compile(b'"([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*)')
@@ -119,7 +118,7 @@ def load_read(self, read_bytes: int) -> bytes:
 class XpmDecoder(ImageFile.PyDecoder):
     _pulls_fd = True
 
-    def decode(self, buffer: Buffer | Image.SupportsArrayInterface) -> tuple[int, int]:
+    def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int]:
         assert self.fd is not None
 
         data = bytearray()
diff --git a/src/PIL/_typing.py b/src/PIL/_typing.py
index 19c6a4d6a32..a941f89806f 100644
--- a/src/PIL/_typing.py
+++ b/src/PIL/_typing.py
@@ -21,13 +21,10 @@
 else:
     CapsuleType = object
 
-if TYPE_CHECKING:
-    from typing_extensions import Buffer
+if sys.version_info >= (3, 12):
+    from collections.abc import Buffer
 else:
-    if sys.version_info >= (3, 12):
-        from collections.abc import Buffer
-    else:
-        Buffer = Any
+    Buffer = Any
 
 
 _Ink = float | tuple[int, ...] | str