Make sure test_filename_with_special_chars properly tests combinations of chars

Updated whatsnew

Author: vnlitvinov

doc/source/whatsnew/v0.25.0.rst

@@ -141,6 +141,7 @@ Bug Fixes
 - Bug in :func:`to_datetime` which would raise an (incorrect) ``ValueError`` when called with a date far into the future and the ``format`` argument specified instead of raising ``OutOfBoundsDatetime`` (:issue:`23830`)
 - Bug in an error message in :meth:`DataFrame.plot`. Improved the error message if non-numerics are passed to :meth:`DataFrame.plot` (:issue:`25481`)
 - Bug in error messages in :meth:`DataFrame.corr` and :meth:`Series.corr`. Added the possibility of using a callable. (:issue:`25729`)
+- Bug in `TextReader()` not properly working with UTF8 on Windows on Python 3.6+ (fix for :issue:`15086` instead of a workaround)
 
 Categorical
 ^^^^^^^^^^^

pandas/tests/io/parser/test_common.py

@@ -5,6 +5,7 @@
 specific classification into the other test modules.
 """
 
+import sys
 import codecs
 from collections import OrderedDict
 import csv
@@ -1903,13 +1904,21 @@ def test_suppress_error_output(all_parsers, capsys):
     captured = capsys.readouterr()
     assert captured.err == ""
 
+def __should_skip_utf8_test():
+    if compat.is_platform_windows():
+        import ctypes
+        ansi_codepage = ctypes.cdll.kernel32.GetACP()
+        return ansi_codepage != 1252 and sys.version_info < (3, 6)
+    return False
 
+@pytest.mark.skipif(__should_skip_utf8_test(),
+                    reason="Python < 3.6 won't pass on non-1252 codepage")
 def test_filename_with_special_chars(all_parsers):
     # see gh-15086.
     parser = all_parsers
     df = DataFrame({"a": [1, 2, 3]})
 
-    with tm.ensure_clean("sé-es-vé.csv") as path:
+    with tm.ensure_clean("sé-es-vé-sй.csv") as path:
         df.to_csv(path, index=False)
 
         result = parser.read_csv(path)