Mayor Bill de Blasio’s proposal to end use of the Specialized High School Admissions Test (SHSAT) would make the city’s most elite public high schools more racially and ethnically diverse. The mayor’s plan would instead offer seats at the specialized high schools to the top performers in each of the city’s public middle schools. We tested this proposal and found that, if enacted, it would give some 2,000 academically qualified Black and Latinx students each year access to higher-performing schools and a more ethnically diverse cohort of fellow students than they typically have through the current school choice process.