diff --git a/integration/test_tor.py b/integration/test_tor.py
index cec88a483..28360207a 100644
--- a/integration/test_tor.py
+++ b/integration/test_tor.py
@@ -18,6 +18,10 @@ import util
 
 # see "conftest.py" for the fixtures (e.g. "tor_network")
 
+# XXX: Integration tests that involve Tor do not run reliably on
+# Windows.  They are skipped for now, in order to reduce CI noise.
+#
+# https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3347
 if sys.platform.startswith('win'):
     pytest.skip('Skipping Tor tests on Windows', allow_module_level=True)