bpo-41068: Fix read after write in zipfile for non-ASCII files names. (GH-21040)

diff --git a/Lib/test/test_zipfile.py b/Lib/test/test_zipfile.py
index c9ca1dd..b7bc218 100644
--- a/Lib/test/test_zipfile.py
+++ b/Lib/test/test_zipfile.py
@@ -1600,6 +1600,11 @@
             self.assertEqual(zf.filelist[0].filename, "foo.txt")
             self.assertEqual(zf.filelist[1].filename, "\xf6.txt")
 
+    def test_read_after_write_unicode_filenames(self):
+        with zipfile.ZipFile(TESTFN2, 'w') as zipfp:
+            zipfp.writestr('приклад', b'sample')
+            self.assertEqual(zipfp.read('приклад'), b'sample')
+
     def test_exclusive_create_zip_file(self):
         """Test exclusive creating a new zipfile."""
         unlink(TESTFN2)