Set shell param to False while running code style tests

Signed-off-by: Keshav Priyadarshi <git@keshav.space>

Author: keshav-space

tests/test_codestyle.py

@@ -5,14 +5,18 @@
 # Visit https://aboutcode.org and https://github.com/nexB/univers for support and download.
 
 import subprocess
+import sys
 import unittest
 
+import pytest
 
+
+@pytest.mark.skipif(sys.platform == "darwin", reason="Test does not run on macOS13 and older.")
 class BaseTests(unittest.TestCase):
     def test_codestyle(self):
         args = "black --check -l 100 setup.py src tests"
         try:
-            subprocess.check_output(args.split())
+            subprocess.check_output(args.split(), shell=False)
         except subprocess.CalledProcessError as e:
             print("===========================================================")
             print(e.output)
@@ -25,7 +29,7 @@ def test_codestyle(self):
 
         args = "isort --check-only src tests setup.py"
         try:
-            subprocess.check_output(args.split())
+            subprocess.check_output(args.split(), shell=False)
         except Exception as e:
             print("===========================================================")
             print(e.output)