The HSPT (High School Placement Test) is administered by Scholastic Testing Service.
The HSPT is primarily used by Catholic high schools to determine admission, course placement, and merit scholarships for applicants. The HSPT measures aptitude and preparation for entrance to a four-year high school program. Students in 8th grade register to take the test at the private school to which they are applying (often the test is just called an admission or placement test and not explicitly called the HSPT).