diff --git a/test/datetime/format.test.ts b/test/datetime/format.test.ts
index 28bdcc0..622a426 100644
--- a/test/datetime/format.test.ts
+++ b/test/datetime/format.test.ts
@@ -190,10 +190,10 @@ test("DateTime#toISODate() returns ISO 8601 date in format [±YYYYY]", () => {
 
 test("DateTime#toISODate() correctly pads negative years", () => {
     expect(DateTime.fromObject({ year: -1, month: 1, day: 1 }, { zone: "utc" }).toISODate()).toBe(
-        "-0001-01-01"
+        "-000001-01-01"
     );
     expect(DateTime.fromObject({ year: -10, month: 1, day: 1 }, { zone: "utc" }).toISODate()).toBe(
-        "-0010-01-01"
+        "-000010-01-01"
     );
 });