diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
index da87008..65aa033 100644
--- a/Lib/test/test_decimal.py
+++ b/Lib/test/test_decimal.py
@@ -30,6 +30,7 @@
 import pickle, copy
 import unittest
 from decimal import *
+import numbers
 from test.test_support import (TestSkipped, run_unittest, run_doctest,
                                is_resource_enabled)
 import random
@@ -1334,6 +1335,12 @@
 
 class DecimalPythonAPItests(unittest.TestCase):
 
+    def test_abc(self):
+        self.assert_(issubclass(Decimal, numbers.Number))
+        self.assert_(not issubclass(Decimal, numbers.Real))
+        self.assert_(isinstance(Decimal(0), numbers.Number))
+        self.assert_(not isinstance(Decimal(0), numbers.Real))
+
     def test_pickle(self):
         d = Decimal('-3.141590000')
         p = pickle.dumps(d)