Index: pyyaml/trunk/tests/lib3/test_errors.py
===================================================================
--- pyyaml/trunk/tests3/test_errors.py	(revision 328)
+++ pyyaml/trunk/tests/lib3/test_errors.py	(revision 330)
@@ -51,5 +51,6 @@
     code = open(error_filename, 'rb').read()
     try:
-        import yaml, io
+        import yaml
+        from io import StringIO
         exec(code)
     except yaml.YAMLError as exc: