You can take free tests at Whizlabs that are actually the trail of the paid practice tests. Open the website www.whizlabs.com and go to the desired course from home tab. Click on Free Test and you will be asked to enter some basic details to get access to the test. Enter your name, email address, and contact number, and then click on Get Access to Test. You will be moved to the page where you can continue to take free test.
Also, you will get a mail with login details - username as your email address, password for the account and the login URL with that you can login and take the free test next time.