diff --git a/.ci/install.sh b/.ci/install.sh
index 518b66acc23..6aa122cc56e 100755
--- a/.ci/install.sh
+++ b/.ci/install.sh
@@ -37,7 +37,8 @@ python3 -m pip install -U pytest-timeout
 python3 -m pip install pyroma
 
 if [[ $(uname) != CYGWIN* ]]; then
-    python3 -m pip install numpy
+    # TODO Remove condition when NumPy supports 3.12
+    if ! [ "$GHA_PYTHON_VERSION" == "3.12-dev" ]; then python3 -m pip install numpy ; fi
 
     # PyQt6 doesn't support PyPy3
     if [[ $GHA_PYTHON_VERSION == 3.* ]]; then
diff --git a/.github/workflows/macos-install.sh b/.github/workflows/macos-install.sh
index dfd7d055302..1fc6262f4fe 100755
--- a/.github/workflows/macos-install.sh
+++ b/.github/workflows/macos-install.sh
@@ -13,7 +13,8 @@ python3 -m pip install -U pytest-cov
 python3 -m pip install -U pytest-timeout
 python3 -m pip install pyroma
 
-python3 -m pip install numpy
+# TODO Remove condition when NumPy supports 3.12
+if ! [ "$GHA_PYTHON_VERSION" == "3.12-dev" ]; then python3 -m pip install numpy ; fi
 
 # extra test images
 pushd depends && ./install_extra_test_images.sh && popd
diff --git a/.github/workflows/test-windows.yml b/.github/workflows/test-windows.yml
index e938e999d1b..306e34ca91b 100644
--- a/.github/workflows/test-windows.yml
+++ b/.github/workflows/test-windows.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12-dev"]
         architecture: ["x86", "x64"]
         include:
           # PyPy 7.3.4+ only ships 64-bit binaries for Windows
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 11c7b77be03..8e06de4cc27 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -22,6 +22,7 @@ jobs:
         python-version: [
           "pypy3.9",
           "pypy3.8",
+          "3.12-dev",
           "3.11",
           "3.10",
           "3.9",
diff --git a/docs/installation.rst b/docs/installation.rst
index ea8722c569d..1b5719a8e34 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -442,21 +442,23 @@ These platforms are built and tested for every change.
 +----------------------------------+----------------------------+---------------------+
 | Gentoo                           | 3.9                        | x86-64              |
 +----------------------------------+----------------------------+---------------------+
-| macOS 11 Big Sur                 | 3.7, 3.8, 3.9, 3.10, 3.11, | x86-64              |
-|                                  | PyPy3                      |                     |
+| macOS 12 Monterey                | 3.7, 3.8, 3.9, 3.10, 3.11, | x86-64              |
+|                                  | 3.12, PyPy3                |                     |
 +----------------------------------+----------------------------+---------------------+
 | Ubuntu Linux 18.04 LTS (Bionic)  | 3.9                        | x86-64              |
 +----------------------------------+----------------------------+---------------------+
-| Ubuntu Linux 20.04 LTS (Focal)   | 3.7, 3.8, 3.9, 3.10, 3.11, | x86-64              |
-|                                  | PyPy3                      |                     |
+| Ubuntu Linux 20.04 LTS (Focal)   | 3.8                        | x86-64              |
 +----------------------------------+----------------------------+---------------------+
-| Ubuntu Linux 22.04 LTS (Jammy)   | 3.10                       | arm64v8, ppc64le,   |
-|                                  |                            | s390x, x86-64       |
+| Ubuntu Linux 22.04 LTS (Jammy)   | 3.7, 3.8, 3.9, 3.10, 3.11, | x86-64              |
+|                                  | 3.12, PyPy3                |                     |
+|                                  +----------------------------+---------------------+
+|                                  | 3.10                       | arm64v8, ppc64le,   |
+|                                  |                            | s390x               |
 +----------------------------------+----------------------------+---------------------+
 | Windows Server 2016              | 3.7                        | x86-64              |
 +----------------------------------+----------------------------+---------------------+
 | Windows Server 2022              | 3.7, 3.8, 3.9, 3.10, 3.11, | x86, x86-64         |
-|                                  | PyPy3                      |                     |
+|                                  | 3.12, PyPy3                |                     |
 |                                  +----------------------------+---------------------+
 |                                  | 3.9 (MinGW)                | x86, x86-64         |
 |                                  +----------------------------+---------------------+
diff --git a/src/_imaging.c b/src/_imaging.c
index 05e1370f6e3..cece2e93a33 100644
--- a/src/_imaging.c
+++ b/src/_imaging.c
@@ -3984,8 +3984,6 @@ PyImaging_GrabScreenWin32(PyObject *self, PyObject *args);
 extern PyObject *
 PyImaging_GrabClipboardWin32(PyObject *self, PyObject *args);
 extern PyObject *
-PyImaging_ListWindowsWin32(PyObject *self, PyObject *args);
-extern PyObject *
 PyImaging_EventLoopWin32(PyObject *self, PyObject *args);
 extern PyObject *
 PyImaging_DrawWmf(PyObject *self, PyObject *args);
@@ -4069,7 +4067,6 @@ static PyMethodDef functions[] = {
     {"grabclipboard_win32", (PyCFunction)PyImaging_GrabClipboardWin32, METH_VARARGS},
     {"createwindow", (PyCFunction)PyImaging_CreateWindowWin32, METH_VARARGS},
     {"eventloop", (PyCFunction)PyImaging_EventLoopWin32, METH_VARARGS},
-    {"listwindows", (PyCFunction)PyImaging_ListWindowsWin32, METH_VARARGS},
     {"drawwmf", (PyCFunction)PyImaging_DrawWmf, METH_VARARGS},
 #endif
 #ifdef HAVE_XCB
diff --git a/src/display.c b/src/display.c
index 0ce10e2493c..a50fc3e242b 100644
--- a/src/display.c
+++ b/src/display.c
@@ -421,79 +421,6 @@ PyImaging_GrabScreenWin32(PyObject *self, PyObject *args) {
     return NULL;
 }
 
-static BOOL CALLBACK
-list_windows_callback(HWND hwnd, LPARAM lParam) {
-    PyObject *window_list = (PyObject *)lParam;
-    PyObject *item;
-    PyObject *title;
-    RECT inner, outer;
-    int title_size;
-    int status;
-
-    /* get window title */
-    title_size = GetWindowTextLength(hwnd);
-    if (title_size > 0) {
-        title = PyUnicode_FromStringAndSize(NULL, title_size);
-        if (title) {
-            GetWindowTextW(hwnd, PyUnicode_AS_UNICODE(title), title_size + 1);
-        }
-    } else {
-        title = PyUnicode_FromString("");
-    }
-    if (!title) {
-        return 0;
-    }
-
-    /* get bounding boxes */
-    GetClientRect(hwnd, &inner);
-    GetWindowRect(hwnd, &outer);
-
-    item = Py_BuildValue(
-        F_HANDLE "N(iiii)(iiii)",
-        hwnd,
-        title,
-        inner.left,
-        inner.top,
-        inner.right,
-        inner.bottom,
-        outer.left,
-        outer.top,
-        outer.right,
-        outer.bottom);
-    if (!item) {
-        return 0;
-    }
-
-    status = PyList_Append(window_list, item);
-
-    Py_DECREF(item);
-
-    if (status < 0) {
-        return 0;
-    }
-
-    return 1;
-}
-
-PyObject *
-PyImaging_ListWindowsWin32(PyObject *self, PyObject *args) {
-    PyObject *window_list;
-
-    window_list = PyList_New(0);
-    if (!window_list) {
-        return NULL;
-    }
-
-    EnumWindows(list_windows_callback, (LPARAM)window_list);
-
-    if (PyErr_Occurred()) {
-        Py_DECREF(window_list);
-        return NULL;
-    }
-
-    return window_list;
-}
-
 /* -------------------------------------------------------------------- */
 /* Windows clipboard grabber */