Fix sdist test on Windows (#12678). Patch by Jeremy Kloth.
diff --git a/Lib/distutils/tests/test_sdist.py b/Lib/distutils/tests/test_sdist.py
index 440af98..f34f786 100644
--- a/Lib/distutils/tests/test_sdist.py
+++ b/Lib/distutils/tests/test_sdist.py
@@ -365,6 +365,7 @@
def test_manual_manifest(self):
# check that a MANIFEST without a marker is left alone
dist, cmd = self.get_cmd()
+ cmd.formats = ['gztar']
cmd.ensure_finalized()
self.write_file((self.tmp_dir, cmd.manifest), 'README.manual')
self.write_file((self.tmp_dir, 'README.manual'),