As of October 1, 2008, Naturalization applicants began taking a revised Naturalization test.
The U.S. Citizenship and Immigration Services (USCIS) redesigned the test in order to create a more standardized, fair and meaningful naturalization process. The revised test, emphasizing the fundamental concepts of American democracy and the rights and responsibilities of citizenship, will help encourage citizenship applicants to learn and identify with basic American values.
Source: USCIS.gov