fixup! Make sure trickle responses aren't cached

tools/wptserve/tests/functional/test_pipes.py

diff --git a/tools/wptserve/tests/functional/test_pipes.py b/tools/wptserve/tests/functional/test_pipes.py
index 682a9e7..bd38f2e 100644
--- a/tools/wptserve/tests/functional/test_pipes.py
+++ b/tools/wptserve/tests/functional/test_pipes.py
@@ -77,7 +77,7 @@
         self.assertGreater(6, t1-t0)
 
     def test_headers(self):
-        resp = self.request("/document.txt", query="pipe=trickle(d0.01))")
+        resp = self.request("/document.txt", query="pipe=trickle(d0.01)")
         self.assertEqual(resp.info()["Cache-Control"], "no-cache, no-store, must-revalidate")
         self.assertEqual(resp.info()["Pragma"], "no-cache")
         self.assertEqual(resp.info()["Expires"], "0")