Some tests, especially ones that are created/used by government agencies or universities, can be found with Google or other search engines.
CAUTION: Anyone can post something on a website, so there are many unofficial, altered, and incomplete tests online. For professional and research purposes, you should use versions posted by the correct authors and publishers. Here are some tips for finding them:
If you have questions about applying eduction and psychological testing standards, check out this webinar from the Buros Center for Testing on the latest Standards for Educational and Psychological Testing (2014) published by the American Educational Research Association, American Psychological Association, and National Council on Measurement in Education.
Credit: Penn State University Libraries - PSYC 571: Tests and Measurements (Harrisburg) by Bernadette Lear