def test_scheme_host_case_insensitive(self) -> None:
        """Assert that upper-case schemes and hosts are normalized."""
        with proxy_from_url(self.proxy_url.upper(), ca_certs=DEFAULT_CA) as http:
            r = http.request("GET", f"{self.http_url.upper()}/")
            assert r.status == 200

            r = http.request("GET", f"{self.https_url.upper()}/")
            assert r.status == 200
Assert that upper-case schemes and hosts are normalized.
test/with_dummyserver/test_proxy_poolmanager.py