The SIGINT signal may happen earlier, during site.py initialization.
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index 19eed15..a858c40 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -669,10 +669,7 @@
def test_send_signal(self):
p = self._kill_process('send_signal', signal.SIGINT)
_, stderr = p.communicate()
- self.assertStderrEqual(stderr,
- "Traceback (most recent call last):\n"
- " File \"<string>\", line 1, in <module>\n"
- "KeyboardInterrupt\n")
+ self.assertIn('KeyboardInterrupt', stderr)
self.assertNotEqual(p.wait(), 0)
def test_kill(self):