diff --git a/python/grass/gunittest/testsuite/test_assertions.py b/python/grass/gunittest/testsuite/test_assertions.py
index 64bc790b3dd..631e0e9d2f8 100644
--- a/python/grass/gunittest/testsuite/test_assertions.py
+++ b/python/grass/gunittest/testsuite/test_assertions.py
@@ -351,18 +351,21 @@ def setUpClass(cls):
         open(cls.emtpy_file, "w").close()
         cls.file_with_md5 = cls.__name__ + "_this_is_a_file_with_known_md5"
         file_content = "Content of the file with known MD5.\n"
-        Path(cls.file_with_md5).write_text(file_content)
+        # newline="" keeps the \n as-is instead of letting the platform
+        # default translate it to \r\n, so the MD5 matches file_md5 below
+        # on every platform (assertFileMd5 hashes the file in binary mode)
+        Path(cls.file_with_md5).write_text(file_content, newline="")
         # MD5 sum created using:
         # echo 'Content of the file with known MD5.' > some_file.txt
         # md5sum some_file.txt
         cls.file_md5 = "807bba4ffac4bb351bc3f27853009949"
 
         cls.file_with_same_content = cls.__name__ + "_file_with_same_content"
-        Path(cls.file_with_same_content).write_text(file_content)
+        Path(cls.file_with_same_content).write_text(file_content, newline="")
 
         cls.file_with_different_content = cls.__name__ + "_file_with_different_content"
         Path(cls.file_with_different_content).write_text(
-            file_content + " Something else here."
+            file_content + " Something else here.", newline=""
         )
 
     @classmethod
@@ -386,7 +389,6 @@ def test_assertFileExists_empty_file(self):
             self.failureException, self.assertFileExists, filename=self.emtpy_file
         )
 
-    @xfail_windows
     def test_assertFileMd5(self):
         self.assertFileMd5(filename=self.file_with_md5, md5=self.file_md5)
         self.assertRaises(
diff --git a/python/grass/gunittest/testsuite/test_checkers.py b/python/grass/gunittest/testsuite/test_checkers.py
index c1a692fbc6d..14356fe4f24 100644
--- a/python/grass/gunittest/testsuite/test_checkers.py
+++ b/python/grass/gunittest/testsuite/test_checkers.py
@@ -22,7 +22,6 @@
     file_md5,
     text_file_md5,
 )
-from grass.gunittest.utils import xfail_windows
 
 
 class TestValuesEqual(TestCase):
@@ -369,8 +368,10 @@ def setUpClass(cls):
         with open(cls.correct_file_name_platform_nl, "w") as f:
             # \n should be converted to platform newline
             f.writelines(line + "\n" for line in CORRECT_LINES)
-        with open(cls.correct_file_name_unix_nl, "w") as f:
-            # binary mode will write pure \n
+        with open(cls.correct_file_name_unix_nl, "w", newline="") as f:
+            # newline="" keeps the \n as-is instead of letting the platform
+            # default translate it to \r\n, so file_md5() (binary mode)
+            # below matches correct_md5sum on every platform
             f.writelines(line + "\n" for line in CORRECT_LINES)
         with open(cls.wrong_file_name, "w") as f:
             # \n should be converted to platform newline
@@ -382,7 +383,6 @@ def tearDownClass(cls):
         try_remove(cls.correct_file_name_unix_nl)
         try_remove(cls.wrong_file_name)
 
-    @xfail_windows
     def test_text_file_binary(self):
         r"""File with ``\n`` (LF) newlines as binary (MD5 has ``\n``)."""
         self.assertEqual(