Fixing - Issue7026 - RuntimeError: dictionary changed size during iteration. Patch by flox
diff --git a/Lib/test/test_userstring.py b/Lib/test/test_userstring.py
index b99581d..8ec9ca3 100755
--- a/Lib/test/test_userstring.py
+++ b/Lib/test/test_userstring.py
@@ -136,8 +136,11 @@
 
 def test_main():
     with warnings.catch_warnings():
+        # Silence Py3k warnings
         warnings.filterwarnings("ignore", ".*MutableString",
                                 DeprecationWarning)
+        warnings.filterwarnings("ignore", ".+slice__ has been removed",
+                                DeprecationWarning)
         test_support.run_unittest(UserStringTest, MutableStringTest)
 
 if __name__ == "__main__":