python
diff --git a/‎Lib/test/test_ctypes/test_pickling.py
Copy file name to clipboardExpand all lines: Lib/test/test_ctypes/test_pickling.py
+2-2Lines changed: 2 additions & 2 deletions b/‎Lib/test/test_ctypes/test_pickling.py
Copy file name to clipboardExpand all lines: Lib/test/test_ctypes/test_pickling.py
+2-2Lines changed: 2 additions & 2 deletions
diff --git a/‎Lib/test/test_ctypes/test_refcounts.py
Copy file name to clipboardExpand all lines: Lib/test/test_ctypes/test_refcounts.py
+3-3Lines changed: 3 additions & 3 deletions b/‎Lib/test/test_ctypes/test_refcounts.py
Copy file name to clipboardExpand all lines: Lib/test/test_ctypes/test_refcounts.py
+3-3Lines changed: 3 additions & 3 deletions
diff --git a/‎Modules/_ctypes/_ctypes.c
Copy file name to clipboardExpand all lines: Modules/_ctypes/_ctypes.c
+2-2Lines changed: 2 additions & 2 deletions b/‎Modules/_ctypes/_ctypes.c
Copy file name to clipboardExpand all lines: Modules/_ctypes/_ctypes.c
+2-2Lines changed: 2 additions & 2 deletions
@@ -3,7 +3,7 @@
 from ctypes import (CDLL, Structure, CFUNCTYPE, pointer,
                     c_void_p, c_char_p, c_wchar_p,
                     c_char, c_wchar, c_int, c_double)
-from test.support import import_helper
+from test.support import import_helper, thread_unsafe
 _ctypes_test = import_helper.import_module("_ctypes_test")
 
 
@@ -21,7 +21,6 @@ def __init__(self, *args, **kw):
 class Y(X):
     _fields_ = [("str", c_char_p)]
 
-
 class PickleTest:
     def dumps(self, item):
         return pickle.dumps(item, self.proto)
@@ -39,6 +38,7 @@ def test_simple(self):
             self.assertEqual(memoryview(src).tobytes(),
                                  memoryview(dst).tobytes())
 
+    @thread_unsafe('not thread safe')
     def test_struct(self):
         X.init_called = 0
 
 
@@ -3,7 +3,7 @@
 import sys
 import unittest
 from test import support
-from test.support import import_helper
+from test.support import import_helper, thread_unsafe
 from test.support import script_helper
 _ctypes_test = import_helper.import_module("_ctypes_test")
 
@@ -13,7 +13,7 @@
 
 dll = ctypes.CDLL(_ctypes_test.__file__)
 
-
+@thread_unsafe('not thread safe')
 class RefcountTestCase(unittest.TestCase):
     @support.refcount_test
     def test_1(self):
@@ -82,7 +82,7 @@ class X(ctypes.Structure):
         gc.collect()
         self.assertEqual(sys.getrefcount(func), orig_refcount)
 
-
+@thread_unsafe('not thread safe')
 class AnotherLeak(unittest.TestCase):
     def test_callback(self):
         proto = ctypes.CFUNCTYPE(ctypes.c_int, ctypes.c_int, ctypes.c_int)
 
@@ -2991,13 +2991,13 @@ PyCData_dealloc(PyObject *self)
 }
 
 static PyMemberDef PyCData_members[] = {
-    { "_b_base_", _Py_T_OBJECT,
+    { "_b_base_", Py_T_OBJECT,
       offsetof(CDataObject, b_base), Py_READONLY,
       "the base object" },
     { "_b_needsfree_", Py_T_INT,
       offsetof(CDataObject, b_needsfree), Py_READONLY,
       "whether the object owns the memory or not" },
-    { "_objects", _Py_T_OBJECT,
+    { "_objects", Py_T_OBJECT,
       offsetof(CDataObject, b_objects), Py_READONLY,
       "internal objects tree (NEVER CHANGE THIS OBJECT!)"},
     { NULL },