diff --git a/tests/tests_system/test_process.py b/tests/tests_system/test_process.py
index 49a9da2a71..3a5ff5da0a 100644
--- a/tests/tests_system/test_process.py
+++ b/tests/tests_system/test_process.py
@@ -6,7 +6,6 @@
 # compatible open source license.
 
 import tempfile
-import time
 import unittest
 from unittest.mock import MagicMock, call, patch
 
@@ -26,16 +25,13 @@ def test(self) -> None:
         self.assertIsNotNone(process_handler.stderr_data)
 
         return_code = process_handler.terminate()
-        # Adding time of sleep to property terminate process
-        # Or the return code will be `None`
-        time.sleep(10)
 
         # In Python 3.9 it seems that Process Termination is not as stable in 3.7.
         # With low hardware specs the result can be None
         # While on a much beefier server the termination can be instant
+        # We even observed the same success on CentOS7 but fail on Ubuntu out of nowhere
         # Adding sleep time is not very efficient and it is very random, thus allow 2 return values here.
-        # assert return_code in [None, 1]
-        self.assertEqual(return_code, None)
+        assert return_code in [None, 1]
         self.assertIsNotNone(process_handler.stdout_data)
         self.assertIsNotNone(process_handler.stderr_data)