These tests were already working

src/runtime/dict.cpp

@@ -255,7 +255,6 @@ template <enum ExceptionStyle S> Box* dictGetitem(BoxedDict* self, Box* k) noexc
             // Special-case defaultdict, assuming that it's the main time we will actually hit this.
             // We could just use a single runtime IC here, or have a small cache that maps type->runtimeic.
             // Or use a polymorphic runtime ic.
-            assert(0 && "check refcounting");
             static BoxedClass* defaultdict_cls = NULL;
             static CallattrIC defaultdict_ic;
             if (defaultdict_cls == NULL && strcmp(self->cls->tp_name, "collections.defaultdict") == 0) {

test/tests/collections_test.py

-# expected: reffail
 import collections
 
 o = collections.OrderedDict()

test/tests/dict_subclassing.py

-# expected: reffail
 class MyDict(dict):
     pass
 

test/tests/vregs_only_introspection.py

-# expected: reffail
 import sys
 def f():
     # By the time of the f_locals call, x will only be alive because
@@ -6,7 +5,7 @@ def f():
     x = 100.0 ** 10
     for i in xrange(10000):
         200.0 * 200.0
-    print sys._getframe(0).f_locals
+    print sorted(sys._getframe(0).f_locals.items())
 
     # Avoid testing the lifetime of i by keeping it alive here:
     print i
@@ -18,9 +17,8 @@ def f():
     y = 100 * 100
     for i in xrange(10000):
         200 * 200
-    print sys._getframe(0).f_locals
+    print sorted(sys._getframe(0).f_locals.items())
 
     # Avoid testing the lifetime of i by keeping it alive here:
     print i
-trap()
 f()