# Check that expected warning is printed.
# shellcheck disable=SC2016
-bt_grep -q 'No trace was found based on input `some_other_non_opt`' "$stderr_actual_file"
-ok "$?" "warning is printed"
+bt_grep_ok \
+ 'No trace was found based on input `some_other_non_opt`' \
+ "$stderr_actual_file" \
+ "warning is printed"
rm -f "$stdout_actual_file"
rm -f "$stderr_actual_file"