Kill all dummy processes after launch

Just in case

tests/__init__.py

@@ -2,6 +2,7 @@ import functools
 import os
 import shutil
 import subprocess
+from unittest import TestCase
 
 from aiohttp.test_utils import AioHTTPTestCase, unused_port
 from aiounittest import AsyncTestCase
@@ -9,11 +10,15 @@ from click.testing import CliRunner
 
 from catfish.__main__ import cli
 from catfish.router import get_server
-from catfish.utils.processes import terminate_subprocesses
+from catfish.utils.processes import (
+    get_root_process,
+    terminate_processes,
+    terminate_subprocesses,
+)
 from catfish.utils.sockets import create_base_socket_dir, delete_base_socket_dir
 
 
-class BaseTestCase(AsyncTestCase):
+class BaseTestCase(TestCase):
     DUMMY_EXE = os.path.join(os.path.dirname(__file__), "dummy_program.py")
 
     def setUp(self):
@@ -22,8 +27,16 @@ class BaseTestCase(AsyncTestCase):
         self.cli = cli
         self.run_cli = functools.partial(self.cli_runner.invoke, self.cli)
 
+    def terminate_dummy_processes(self):
+        dummy_processes = []
+        for process in get_root_process().children(recursive=True):
+            if self.DUMMY_EXE in " ".join(process.cmdline()):
+                dummy_processes.append(process)
+        terminate_processes(dummy_processes)
+
     def tearDown(self):
         terminate_subprocesses()
+        self.terminate_dummy_processes()
         delete_base_socket_dir()