async def METHOD_NAME(test_cli: Tuple[HTTPTestClient, str]):
    # Creating a session should work
    resp = await test_cli[0].post("/server/update/begin")
    body = await resp.json()
    assert resp.status == 201
    assert "token" in body
    assert test_cli[0].server.app.get(update.SESSION_VARNAME)
    assert test_cli[0].server.app[update.SESSION_VARNAME].token == body["token"]
    # Creating a session twice shouldn’t
    resp = await test_cli[0].post("/server/update/begin")
    body = await resp.json()
    assert resp.status == 409
    assert "message" in body