diff --git a/acceptance/bundle/exec/basic/output.txt b/acceptance/bundle/exec/basic/output.txt
index ef56f139f..1b932e9b2 100644
--- a/acceptance/bundle/exec/basic/output.txt
+++ b/acceptance/bundle/exec/basic/output.txt
@@ -12,5 +12,5 @@ Error: running "bash -c exit 5" failed with exit code: 5
 
 Exit code: 1
 
->>> [CLI] bundle exec -- bash -c echo hello > /dev/stderr
-hello
+>>> [CLI] bundle exec -- python3 -c import sys; print('Hello', file=sys.stderr)
+Hello
diff --git a/acceptance/bundle/exec/basic/script b/acceptance/bundle/exec/basic/script
index 20b56ad1a..1aaf140da 100644
--- a/acceptance/bundle/exec/basic/script
+++ b/acceptance/bundle/exec/basic/script
@@ -8,4 +8,4 @@ errcode trace $CLI bundle exec -- --help
 errcode trace $CLI bundle exec -- bash -c "exit 5"
 
 # stderr should also be passed through.
-trace $CLI bundle exec -- bash -c "echo hello > /dev/stderr"
+trace $CLI bundle exec -- python3 -c "import sys; print('Hello', file=sys.stderr)"