Temporary disable tests cleanup (issue 11798).
diff --git a/Lib/unittest/suite.py b/Lib/unittest/suite.py
index 176af57..e7b8b4a 100644
--- a/Lib/unittest/suite.py
+++ b/Lib/unittest/suite.py
@@ -66,6 +66,7 @@
 
     def _removeTestAtIndex(self, index):
         """Stop holding a reference to the TestCase at index."""
+        return
         try:
             self._tests[index] = None
         except TypeError: