Used trial.unittest.patch to modify a unit test that was failing on a system with no .pem files in the certs directory.
Used trial.unittest.patch to modify a unit test that was failing on a system
with no .pem files in the certs directory.

twisted/txaws,mithrandi/txaws,oubiwann/txaws,mithrandi/txaws,oubiwann/txaws,twisted/txaws