fn("HTTP/1.1", res1)
		fn("HTTP/2.0", res2)
	}

	tt.normalizeRes(t, res1, "HTTP/1.1")
	tt.normalizeRes(t, res2, "HTTP/2.0")
	res1body, res2body := res1.Body, res2.Body

	eres1 := mostlyCopy(res1)
	eres2 := mostlyCopy(res2)
	if !reflect.DeepEqual(eres1, eres2) {
		t.Errorf("Response headers to handler differed:\nhttp/1 (%v):\n\t%#v\nhttp/2 (%v):\n\t%#v",
			cst1.ts.URL, eres1, cst2.ts.URL, eres2)
	}