I wouldn't recommend using JAWS and IE for CI. For this purpose, I think it would be much better to use NVDA (https://www.nvaccess.org/) with any browser that can be controlled by a test framework like Selenium. (NVDA supports all the major browsers now.) Then, to feed the text-to-speech output back into your test framework, you can write a simple TTS driver for NVDA, in Python.