diff --git a/Lib/ctypes/test/test_win32.py b/Lib/ctypes/test/test_win32.py
index ee722704a35..a2941f3fe07 100644
--- a/Lib/ctypes/test/test_win32.py
+++ b/Lib/ctypes/test/test_win32.py
@@ -68,7 +68,7 @@ class ReturnStructSizesTestCase(unittest.TestCase):
             for i, f in enumerate(fields):
                 value = getattr(res, f[0])
                 expected = bytes([ord('a') + i])
-                self.assertEquals(value, expected)
+                self.assertEqual(value, expected)