Make test_warnings re-entrant.
diff --git a/Lib/test/test_warnings.py b/Lib/test/test_warnings.py
index cca6329..66246cf 100644
--- a/Lib/test/test_warnings.py
+++ b/Lib/test/test_warnings.py
@@ -1,5 +1,6 @@
import warnings
import os
+import sys
import unittest
from test import test_support
@@ -101,6 +102,10 @@
# to test_main (regrtest -R).
if '__warningregistry__' in globals():
del globals()['__warningregistry__']
+ if hasattr(warning_tests, '__warningregistry__'):
+ del warning_tests.__warningregistry__
+ if hasattr(sys, '__warningregistry__'):
+ del sys.__warningregistry__
test_support.run_unittest(TestModule)
if __name__ == "__main__":