diff --git a/src/allmydata/test/test_windows.py b/src/allmydata/test/test_windows.py
index 8d8026584..40ec4889e 100644
--- a/src/allmydata/test/test_windows.py
+++ b/src/allmydata/test/test_windows.py
@@ -172,6 +172,7 @@ class GetArgvTests(SyncTestCase):
         )
 
 
+@skipUnless(platform.isWindows(), "intended for Windows-only codepaths")
 class UnicodeOutputTests(SyncTestCase):
     """
     Tests for writing unicode to stdout and stderr.