Recently my nevow web server's unit tests started to fail, because the tests used request.getHeader() to check that request.setHeader() had been called correctly. This used to work. I can see from testutil.py that setHeaders sets self.headers, but getHeaders gets a value from received_headers, and there is a test in test_testutil.py to make sure it does. So is this really how it is meant to work? Is setHeader really meant to set something that getHeader can't get? If so, what's the correct method for testing the result of setHeader? To reproduce the problem, run this with "trial": from nevow.testutil import FakeRequest, TestCase class TestHeaders(TestCase): def setUp(self): self.request = FakeRequest() def test_set(self): self.request.setHeader('location', 'somewhere') self.failUnlessEqual(self.request.getHeader('location'), 'somewhere') Peter.