This test tries to send a KeyboardInterrupt, which does
not work in the build environment.

--- a/test_subprocess32.py	2017-03-06 22:21:49.334045485 +0100
+++ b/test_subprocess32.py	2017-03-06 22:22:02.490439949 +0100
@@ -1299,12 +1299,6 @@
         getattr(p, method)(*args)
         return p
 
-    def test_send_signal(self):
-        p = self._kill_process('send_signal', signal.SIGINT)
-        _, stderr = p.communicate()
-        self.assertIn('KeyboardInterrupt', stderr)
-        self.assertNotEqual(p.wait(), 0)
-
     def test_kill(self):
         p = self._kill_process('kill')
         _, stderr = p.communicate()
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