diff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
index 4efecfd..5150d57 100644
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -515,6 +515,14 @@
         # Test that subtype_dealloc decref the newly assigned __class__ only once
         self.assertEqual(new_type_refcnt, sys.getrefcount(_testcapi.HeapCTypeSubclass))
 
+    def test_heaptype_with_setattro(self):
+        obj = _testcapi.HeapCTypeSetattr()
+        self.assertEqual(obj.pvalue, 10)
+        obj.value = 12
+        self.assertEqual(obj.pvalue, 12)
+        del obj.value
+        self.assertEqual(obj.pvalue, 0)
+
     def test_pynumber_tobase(self):
         from _testcapi import pynumber_tobase
         self.assertEqual(pynumber_tobase(123, 2), '0b1111011')