https://github.com/pexpect/ptyprocess/pull/75

--- ptyprocess-0.7.0/tests/test_invalid_binary.py.orig
+++ ptyprocess-0.7.0/tests/test_invalid_binary.py
@@ -69,6 +69,3 @@
 
 if __name__ == '__main__':
     unittest.main()
-
-suite = unittest.makeSuite(InvalidBinaryChars,'test')
-