updated for version 7.3.1100
Problem:    Python: a few more memory problems.
Solution:   Add and remove Py_XDECREF(). (ZyX)
diff --git a/src/testdir/test87.in b/src/testdir/test87.in
index cf5d5e2..5ebb462 100644
--- a/src/testdir/test87.in
+++ b/src/testdir/test87.in
@@ -833,7 +833,8 @@
     iter_test(expr)
     return subexpr_test(expr, 'ConvertFromPyObject', (
         'None',                 # Not conversible
-        '{"": 1}',              # Empty key not allowed
+        '{b"": 1}',             # Empty key not allowed
+        '{"": 1}',              # Same, but with unicode object
         'FailingMapping()',     #
         'FailingMappingKey()',  #
     ))