diff --git a/test/intl402/Temporal/PlainYearMonth/prototype/monthCode/chinese-calendar-dates.js b/test/intl402/Temporal/PlainYearMonth/prototype/monthCode/chinese-calendar-dates.js
index 8d3f4d0720..a8fc3a08ae 100644
--- a/test/intl402/Temporal/PlainYearMonth/prototype/monthCode/chinese-calendar-dates.js
+++ b/test/intl402/Temporal/PlainYearMonth/prototype/monthCode/chinese-calendar-dates.js
@@ -18,7 +18,7 @@ const leapMonthCases = [
   { year: 1982, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
   // See https://github.com/tc39/proposal-intl-era-monthcode/issues/60
   // { year: 1984, month: 11, monthCode: "M10L", day: 1, referenceYear: 1870, referenceDay: 23 },
-  { year: 1987, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 24 },
+  { year: 1987, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 26 },
   { year: 1990, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 1993, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
   { year: 1995, month: 9, monthCode: "M08L", day: 1, referenceYear: 1957, referenceDay: 25 },