diff --git a/scriptworker_client/src/scriptworker_client/utils.py b/scriptworker_client/src/scriptworker_client/utils.py
index 0bb8c464e..43adf7682 100644
--- a/scriptworker_client/src/scriptworker_client/utils.py
+++ b/scriptworker_client/src/scriptworker_client/utils.py
@@ -13,6 +13,7 @@
 import os
 import random
 import shutil
+import signal
 import tempfile
 from asyncio.subprocess import PIPE
 from contextlib import contextmanager
@@ -174,9 +175,7 @@ async def run_command(
     env=None,
     exception=None,
     expected_exit_codes=(0,),
-    # https://stackoverflow.com/questions/18731791/determining-if-a-python-subprocess-segmentation-faults
-    # Shell exit codes range from 0 to 255. Therefore 245 == -11, 241 == -15
-    copy_exit_codes=(245, 241),
+    copy_exit_codes=(-signal.SIGTERM, -signal.SIGSEGV),
     output_log_on_exception=False,
 ):
     """Run a command using ``asyncio.create_subprocess_exec``.
@@ -209,7 +208,7 @@ async def run_command(
             Defaults to ``(0, )``.
         copy_exit_codes (list, optional): the list of exit codes that we
             set ``exit_code`` to if ``exception`` is an instance of
-            ``ClientError``. Defaults to ``(245, 241)``.
+            ``ClientError``. Defaults to ``(-15, -11)``.
         output_log_on_exception (bool, optional): log the output log if we're
             raising an exception.
 
diff --git a/scriptworker_client/tests/test_utils.py b/scriptworker_client/tests/test_utils.py
index 335ab9cf4..b371c58bd 100644
--- a/scriptworker_client/tests/test_utils.py
+++ b/scriptworker_client/tests/test_utils.py
@@ -171,8 +171,8 @@ def test_get_log_filehandle(path, tmpdir):
             True,
         ),
         (
-            ["bash", "-c", ">&2 echo bar && echo foo && exit -11"],
-            245,
+            ["bash", "-c", ">&2 echo bar && echo foo && kill -11 $$"],
+            -11,
             ["foo\nbar\n", "bar\nfoo\n"],
             TaskError,
             True,