Added exceptins for testing non-reversible import mapping for Issue #26013.

diff --git a/Lib/test/test_pickle.py b/Lib/test/test_pickle.py
index bd38cfbea9380b7d1122d817d42f3283ef391302..ee7a667d0614f2975c44e8f17dc0dd4ac99beda6 100644 (file)
--- a/Lib/test/test_pickle.py
+++ b/Lib/test/test_pickle.py
@@ -244,6 +244,8 @@ if has_c_implementation:
 ALT_IMPORT_MAPPING = {
     ('_elementtree', 'xml.etree.ElementTree'),
     ('cPickle', 'pickle'),
+    ('StringIO', 'io'),
+    ('cStringIO', 'io'),
 }
 
 ALT_NAME_MAPPING = {