diff --git a/tests/test-wireproto-clientreactor.py b/tests/test-wireproto-clientreactor.py
--- a/tests/test-wireproto-clientreactor.py
+++ b/tests/test-wireproto-clientreactor.py
@@ -601,7 +601,7 @@
         self.assertEqual(meta[b'data'], response2)
 
 if __name__ == '__main__':
-    if (3, 6, 0) <= sys.version_info <= (3, 6, 3):
+    if (3, 6, 0) <= sys.version_info < (3, 6, 4):
         # Python 3.6.0 through 3.6.3 inclusive shipped with
         # https://bugs.python.org/issue31825 and we can't run these
         # tests on those specific versions of Python. Sigh.