diff -Nur a/tests/tests.py b/tests/tests.py
--- a/tests/tests.py	2023-02-24 01:02:41.000000000 +0800
+++ b/tests/tests.py	2024-06-06 11:09:59.961135920 +0800
@@ -643,7 +643,7 @@
             os.close(fd)
             po = polib.pofile(reffile, autodetect_encoding=False, encoding=encoding)
             po.save_as_mofile(tmpfile1)
-            subprocess.call([msgfmt, '--no-hash', '-o', tmpfile2, reffile])
+            subprocess.call([msgfmt, '--no-convert', '--no-hash', '-o', tmpfile2, reffile])
             try:
                 f = open(tmpfile1, 'rb')
                 s1 = f.read()