1 files changed, 9 insertions, 0 deletions
diff --git a/Lib/ctypes/test/test_buffers.py b/Lib/ctypes/test/test_buffers.py
index 166faaf4e4..15782be757 100644
--- a/Lib/ctypes/test/test_buffers.py
+++ b/Lib/ctypes/test/test_buffers.py
@@ -60,5 +60,14 @@ class StringBufferTestCase(unittest.TestCase):
         self.assertEqual(b[::2], "ac")
         self.assertEqual(b[::5], "a")
 
+    @need_symbol('c_wchar')
+    def test_create_unicode_buffer_non_bmp(self):
+        expected = 5 if sizeof(c_wchar) == 2 else 3
+        for s in '\U00010000\U00100000', '\U00010000\U0010ffff':
+            b = create_unicode_buffer(s)
+            self.assertEqual(len(b), expected)
+            self.assertEqual(b[-1], '\0')
+
+
 if __name__ == "__main__":
     unittest.main()