diff --git a/.github/workflows/reusable-macos.yml b/.github/workflows/reusable-macos.yml
index 915481d0737c7d..4c3dd10194f8cb 100644
--- a/.github/workflows/reusable-macos.yml
+++ b/.github/workflows/reusable-macos.yml
@@ -37,7 +37,10 @@ jobs:
         path: config.cache
         key: ${{ github.job }}-${{ inputs.os }}-${{ env.IMAGE_VERSION }}-${{ inputs.config_hash }}
     - name: Install Homebrew dependencies
-      run: brew install pkg-config openssl@3.0 xz gdbm tcl-tk make
+      run: |
+        brew install pkg-config openssl@3.0 xz gdbm tcl-tk@8 make
+        # Because alternate versions are not symlinked into place by default:
+        brew link tcl-tk@8
     - name: Configure CPython
       run: |
         GDBM_CFLAGS="-I$(brew --prefix gdbm)/include" \
diff --git a/Doc/library/ctypes.rst b/Doc/library/ctypes.rst
index f490f7563b58a5..bd9529db9ee65a 100644
--- a/Doc/library/ctypes.rst
+++ b/Doc/library/ctypes.rst
@@ -2035,9 +2035,9 @@ Utility functions
 
 .. function:: FormatError([code])
 
-   Returns a textual description of the error code *code*.  If no
-   error code is specified, the last error code is used by calling the Windows
-   api function GetLastError.
+   Returns a textual description of the error code *code*.  If no error code is
+   specified, the last error code is used by calling the Windows API function
+   :func:`GetLastError`.
 
    .. availability:: Windows
 
@@ -2142,9 +2142,8 @@ Utility functions
 
 .. function:: WinError(code=None, descr=None)
 
-   This function is probably the worst-named thing in ctypes. It
-   creates an instance of :exc:`OSError`.  If *code* is not specified,
-   ``GetLastError`` is called to determine the error code. If *descr* is not
+   Creates an instance of :exc:`OSError`.  If *code* is not specified,
+   :func:`GetLastError` is called to determine the error code. If *descr* is not
    specified, :func:`FormatError` is called to get a textual description of the
    error.
 
diff --git a/Lib/test/test_threading_local.py b/Lib/test/test_threading_local.py
index f0b829a978feb5..3a58afd8194a32 100644
--- a/Lib/test/test_threading_local.py
+++ b/Lib/test/test_threading_local.py
@@ -208,6 +208,21 @@ def test_threading_local_clear_race(self):
 
         _testcapi.join_temporary_c_thread()
 
+    @support.cpython_only
+    def test_error(self):
+        class Loop(self._local):
+            attr = 1
+
+        # Trick the "if name == '__dict__':" test of __setattr__()
+        # to always be true
+        class NameCompareTrue:
+            def __eq__(self, other):
+                return True
+
+        loop = Loop()
+        with self.assertRaisesRegex(AttributeError, 'Loop.*read-only'):
+            loop.__setattr__(NameCompareTrue(), 2)
+
 
 class ThreadLocalTest(unittest.TestCase, BaseLocalTest):
     _local = _thread._local
diff --git a/Modules/_threadmodule.c b/Modules/_threadmodule.c
index f2a420ac1c589d..4a45445e2f62db 100644
--- a/Modules/_threadmodule.c
+++ b/Modules/_threadmodule.c
@@ -1624,7 +1624,7 @@ local_setattro(localobject *self, PyObject *name, PyObject *v)
     }
     if (r == 1) {
         PyErr_Format(PyExc_AttributeError,
-                     "'%.100s' object attribute '%U' is read-only",
+                     "'%.100s' object attribute %R is read-only",
                      Py_TYPE(self)->tp_name, name);
         goto err;
     }