diff --git a/pylint/reporters/ureports/base_writer.py b/pylint/reporters/ureports/base_writer.py
index 418079ae0..edf588527 100644
--- a/pylint/reporters/ureports/base_writer.py
+++ b/pylint/reporters/ureports/base_writer.py
@@ -16,7 +16,6 @@
 A way to create simple reports using python objects, primarily designed to be
 formatted as text and html.
 """
-import os
 import sys
 from io import StringIO
 from typing import TYPE_CHECKING, Iterator, List, TextIO, Union
@@ -59,7 +58,7 @@ class BaseWriter:
 
     def writeln(self, string: str = "") -> None:
         """write a line in the output buffer"""
-        self.write(string + os.linesep)
+        self.write(string + "\n")
 
     def write(self, string: str) -> None:
         """write a string in the output buffer"""
diff --git a/pylint/utils/utils.py b/pylint/utils/utils.py
index d8d4baf0a..96f8a6acc 100644
--- a/pylint/utils/utils.py
+++ b/pylint/utils/utils.py
@@ -302,10 +302,11 @@ def _check_csv(value):
     return _splitstrip(value)
 
 
-def _comment(string):
+def _comment(string: str) -> str:
     """return string as a comment"""
     lines = [line.strip() for line in string.splitlines()]
-    return "# " + f"{os.linesep}# ".join(lines)
+    sep = "\n"
+    return "# " + f"{sep}# ".join(lines)
 
 
 def _format_option_value(optdict, value):