diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py
index c2fe633..45e8f74 100644
--- a/Lib/test/pickletester.py
+++ b/Lib/test/pickletester.py
@@ -3,6 +3,7 @@
 import pickle
 import pickletools
 import copyreg
+import weakref
 from http.cookies import SimpleCookie
 
 from test.support import TestFailed, TESTFN, run_with_locale, no_tracing
@@ -842,6 +843,25 @@
                 self.assertEqual(B(x), B(y), detail)
                 self.assertEqual(x.__dict__, y.__dict__, detail)
 
+    def test_newobj_proxies(self):
+        # NEWOBJ should use the __class__ rather than the raw type
+        classes = myclasses[:]
+        # Cannot create weakproxies to these classes
+        for c in (MyInt, MyTuple):
+            classes.remove(c)
+        for proto in protocols:
+            for C in classes:
+                B = C.__base__
+                x = C(C.sample)
+                x.foo = 42
+                p = weakref.proxy(x)
+                s = self.dumps(p, proto)
+                y = self.loads(s)
+                self.assertEqual(type(y), type(x))  # rather than type(p)
+                detail = (proto, C, B, x, y, type(y))
+                self.assertEqual(B(x), B(y), detail)
+                self.assertEqual(x.__dict__, y.__dict__, detail)
+
     # Register a type with copyreg, with extension code extcode.  Pickle
     # an object of that type.  Check that the resulting pickle uses opcode
     # (EXT[124]) under proto 2, and not in proto 1.
@@ -1009,7 +1029,6 @@
             self.assertRaises(RuntimeError, self.dumps, x, proto)
         # protocol 2 don't raise a RuntimeError.
         d = self.dumps(x, 2)
-        self.assertRaises(RuntimeError, self.loads, d)
 
     def test_reduce_bad_iterator(self):
         # Issue4176: crash when 4th and 5th items of __reduce__()