3 files changed, 10 insertions, 6 deletions
diff --git a/setuptools/tests/__init__.py b/setuptools/tests/__init__.py
index b8a29cba..a93be134 100644
--- a/setuptools/tests/__init__.py
+++ b/setuptools/tests/__init__.py
@@ -16,6 +16,10 @@ import setuptools.depends as dep
 from setuptools import Feature
 from setuptools.depends import Require
 
+c_type = os.environ.get("LC_CTYPE", os.environ.get("LC_ALL"))
+is_ascii = c_type in ("C", "POSIX")
+fail_on_ascii = pytest.mark.xfail(is_ascii, "Test fails in this locale")
+
 def makeSetup(**args):
     """Return distribution from 'setup(**args)', without executing commands"""
 
diff --git a/setuptools/tests/test_easy_install.py b/setuptools/tests/test_easy_install.py
index fa510098..00e16b63 100644
--- a/setuptools/tests/test_easy_install.py
+++ b/setuptools/tests/test_easy_install.py
@@ -35,7 +35,7 @@ import setuptools.tests.server
 import pkg_resources
 
 from .py26compat import tarfile_open
-from . import contexts
+from . import contexts, is_ascii
 from .textwrap import DALS
 
 
@@ -430,8 +430,6 @@ class TestScriptHeader:
         expected = '#!"%s"\n' % self.exe_with_spaces
         assert actual == expected
 
-    c_type = os.environ.get("LC_CTYPE", os.environ.get("LC_ALL"))
-    is_ascii = c_type in ("C", "POSIX")
     @pytest.mark.xfail(
         compat.PY3 and is_ascii,
         reason="Test fails in this locale on Python 3"
diff --git a/setuptools/tests/test_sdist.py b/setuptools/tests/test_sdist.py
index 9013b505..4313c456 100644
--- a/setuptools/tests/test_sdist.py
+++ b/setuptools/tests/test_sdist.py
@@ -16,6 +16,8 @@ from setuptools.compat import StringIO, unicode, PY3, PY2
 from setuptools.command.sdist import sdist
 from setuptools.command.egg_info import manifest_maker
 from setuptools.dist import Distribution
+from setuptools.tests import fail_on_ascii
+
 
 SETUP_ATTRS = {
     'name': 'sdist_test',
@@ -147,6 +149,7 @@ class TestSdistTest:
         assert 'setup.py' not in manifest, manifest
         assert 'setup.cfg' not in manifest, manifest
 
+    @fail_on_ascii
     def test_manifest_is_written_with_utf8_encoding(self):
         # Test for #303.
         dist = Distribution(SETUP_ATTRS)
@@ -256,6 +259,7 @@ class TestSdistTest:
             # The filelist should have been updated as well
             assert u_filename not in mm.filelist.files
 
+    @fail_on_ascii
     def test_manifest_is_read_with_utf8_encoding(self):
         # Test for #303.
         dist = Distribution(SETUP_ATTRS)
@@ -320,9 +324,7 @@ class TestSdistTest:
             filename = filename.decode('latin-1')
             assert filename not in cmd.filelist.files
 
-    @pytest.mark.skipif(PY3 and locale.getpreferredencoding() != 'UTF-8',
-        reason='Unittest fails if locale is not utf-8 but the manifests is '
-            'recorded correctly')
+    @fail_on_ascii
     def test_sdist_with_utf8_encoded_filename(self):
         # Test for #303.
         dist = Distribution(SETUP_ATTRS)