Did you know Microsoft have a website with free tools to test your project on Windows/IE? The website is http://www.modern.ie/en-us.
The most important tool avaiable to me is the Virtualization Tool. You can easily download a Windows VM, no login required, just one command.
You can check it out all avaibles VM here, http://www.modern.ie/en-us/virtualization-tools.
Even you dont support old browsers, you can use this VMs to test if your fallback warnings or messenges are working.
That is it guys. I hope it help someone. Happy coding.