diff --git a/ivas_processing_scripts/audiotools/wrappers/bs1770.py b/ivas_processing_scripts/audiotools/wrappers/bs1770.py
index a808b2e6ccb1bd36c53d112dd5a7125646b44f4d..a72398ed11c1ae7c15a06be607a9a00a8e8e9848 100755
--- a/ivas_processing_scripts/audiotools/wrappers/bs1770.py
+++ b/ivas_processing_scripts/audiotools/wrappers/bs1770.py
@@ -33,7 +33,6 @@
 import copy
 import logging
 import re
-import subprocess as sp
 from pathlib import Path
 from tempfile import TemporaryDirectory
 from typing import Optional, Tuple, Union
@@ -84,9 +83,8 @@ def bs1770demo(
         binary = find_binary("bs1770demo")
 
     # checking if the new binary (with '-rms') is used
-    result = sp.run(str(binary), shell=True, stdout=sp.PIPE, stderr=sp.PIPE)
-    result_stdout = result.stdout.decode("utf-8")
-    if "-rms" not in result_stdout:
+    result_check = run([str(binary)], check=False)
+    if "-rms" not in result_check.stdout:
         raise RuntimeError(
             'An bs1770demo executable without RMS support (cmdl option "-rms") was detected. Please update the bs1770demo executable. See bin/README.md for details.'
         )