Index: pyyaml/trunk/tests/test_structure.py
===================================================================
--- pyyaml/trunk/tests/test_structure.py	(revision 146)
+++ pyyaml/trunk/tests/test_structure.py	(revision 222)
@@ -154,4 +154,5 @@
         return self.construct_scalar(node)
 
+MyLoader.add_constructor(u'tag:yaml.org,2002:map', MyLoader.construct_mapping)
 MyLoader.add_constructor(None, MyLoader.construct_undefined)
 
@@ -169,4 +170,5 @@
         return self.construct_scalar(node)
 
+MyCanonicalLoader.add_constructor(u'tag:yaml.org,2002:map', MyCanonicalLoader.construct_mapping)
 MyCanonicalLoader.add_constructor(None, MyCanonicalLoader.construct_undefined)