Issue #18830: inspect.getclasstree() no more produces duplicated entries even
when input list contains duplicates.
diff --git a/Lib/test/inspect_fodder.py b/Lib/test/inspect_fodder.py
index afde2e2..5c87ae6 100644
--- a/Lib/test/inspect_fodder.py
+++ b/Lib/test/inspect_fodder.py
@@ -49,6 +49,8 @@
 class MalodorousPervert(StupidGit):
     pass
 
+Tit = MalodorousPervert
+
 class ParrotDroppings:
     pass