This document provides guidance on how to evaluate the credibility of websites through performing the C.R.R.a.P. test. The C.R.R.a.P. test stands for Currency, Relevance, Reliability, and Purpose. It involves checking that the information is up-to-date (Currency), relevant to your topic (Relevance), from trustworthy authors with verifiable expertise (Reliability), and published for informational rather than hidden commercial purposes (Purpose). Performing this test on websites can help determine which sources provide trustworthy information for research.