diff --git a/tests/test_webclient.py b/tests/test_webclient.py
index fa0083d44..66f8ed4cf 100644
--- a/tests/test_webclient.py
+++ b/tests/test_webclient.py
@@ -220,7 +220,7 @@ class WebClientTestCase(unittest.TestCase):
         os.mkdir(name)
         FilePath(name).child("file").setContent(b"0123456789")
         r = static.File(name)
-        r.putChild(b"redirect", util.Redirect("/file"))
+        r.putChild(b"redirect", util.Redirect(b"/file"))
         r.putChild(b"wait", ForeverTakingResource())
         r.putChild(b"error", ErrorResource())
         r.putChild(b"nolength", NoLengthResource())