import asyncio
import unittest

class TestCase(unittest.TestCase):
    def test_socket_pair_leak(self):
        async def main():
            loop = asyncio.get_running_loop()
            try:
                await loop.subprocess_exec(asyncio.SubprocessProtocol, "non-exisiting-executable")
            except OSError:
                print("non-existing indeed")

        asyncio.run(main(), debug=True)

unittest.main()