diff --git a/test/built-ins/Temporal/Duration/prototype/round/calendar-dateadd-called-with-options-undefined.js b/test/built-ins/Temporal/Duration/prototype/round/calendar-dateadd-called-with-options-undefined.js
index 3d16c0dd5c6..56f26a8523d 100644
--- a/test/built-ins/Temporal/Duration/prototype/round/calendar-dateadd-called-with-options-undefined.js
+++ b/test/built-ins/Temporal/Duration/prototype/round/calendar-dateadd-called-with-options-undefined.js
@@ -24,7 +24,7 @@ const relativeTo = new Temporal.ZonedDateTime(0n, timeZone, calendar);
 
 const instance1 = new Temporal.Duration(1, 1, 1, 1, 1);
 instance1.round({ smallestUnit: "weeks", relativeTo });
-assert.sameValue(calendar.dateAddCallCount, 3, "rounding with calendar smallestUnit");
+assert.sameValue(calendar.dateAddCallCount, 4, "rounding with calendar smallestUnit");
 
 // Rounding with a non-default largestUnit to cover the path in
 // UnbalanceDurationRelative where larger units are converted into smaller
@@ -41,7 +41,7 @@ calendar.dateAddCallCount = 0;
 
 const instance2 = new Temporal.Duration(0, 1, 1, 1);
 instance2.round({ largestUnit: "weeks", smallestUnit: "weeks", relativeTo });
-assert.sameValue(calendar.dateAddCallCount, 5, "rounding with non-default largestUnit and calendar smallestUnit");
+assert.sameValue(calendar.dateAddCallCount, 6, "rounding with non-default largestUnit and calendar smallestUnit");
 
 // Rounding with smallestUnit days only.
 // The calls come from these paths:
@@ -54,4 +54,4 @@ calendar.dateAddCallCount = 0;
 
 const instance3 = new Temporal.Duration(1, 1, 1, 1, 1);
 instance3.round({ smallestUnit: "days", relativeTo });
-assert.sameValue(calendar.dateAddCallCount, 2, "rounding with days smallestUnit");
+assert.sameValue(calendar.dateAddCallCount, 3, "rounding with days smallestUnit");
diff --git a/test/built-ins/Temporal/Duration/prototype/round/dst-balancing-result.js b/test/built-ins/Temporal/Duration/prototype/round/dst-balancing-result.js
new file mode 100644
index 00000000000..40b360238f8
--- /dev/null
+++ b/test/built-ins/Temporal/Duration/prototype/round/dst-balancing-result.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-temporal.duration.prototype.round
+description: >
+    Balancing the resulting duration takes the time zone's UTC offset shifts
+    into account
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const timeZone = TemporalHelpers.springForwardFallBackTimeZone();
+
+// Based on a test case by Adam Shaw
+{
+    const duration = new Temporal.Duration(1, 0, 0, 0, 24);
+    const relativeTo = new Temporal.ZonedDateTime(
+        941184000_000_000_000n /* = 1999-10-29T08Z */,
+        timeZone); /* = 1999-10-29T00-08 in local time */
+
+    const result = duration.round({ largestUnit: "years", relativeTo });
+    TemporalHelpers.assertDuration(result, 1, 0, 0, 0, 24, 0, 0, 0, 0, 0,
+        "24 hours does not balance to 1 day in 25-hour day");
+}
diff --git a/test/built-ins/Temporal/Duration/prototype/round/order-of-operations.js b/test/built-ins/Temporal/Duration/prototype/round/order-of-operations.js
index b42a868e632..dc62d661b2a 100644
--- a/test/built-ins/Temporal/Duration/prototype/round/order-of-operations.js
+++ b/test/built-ins/Temporal/Duration/prototype/round/order-of-operations.js
@@ -394,6 +394,9 @@ const expectedOpsForYearRoundingZoned = expectedOpsForZonedRelativeTo.concat([
   "call options.relativeTo.calendar.dateUntil",  // 12.n
   "call options.relativeTo.calendar.dateAdd",    // 12.r MoveRelativeDate
   "call options.relativeTo.calendar.dateAdd",    // 12.x MoveRelativeDate
+  // MoveRelativeZonedDateTime → AddZonedDateTime
+  "call options.relativeTo.calendar.dateAdd",
+  "call options.relativeTo.timeZone.getPossibleInstantsFor",
   // BalanceDateDurationRelative
   "call options.relativeTo.calendar.dateAdd",    // 9.c
   "call options.relativeTo.calendar.dateUntil",  // 9.d
@@ -420,6 +423,9 @@ const expectedOpsForUnbalanceRoundBalance = expectedOpsForZonedRelativeTo.concat
   "call options.relativeTo.timeZone.getPossibleInstantsFor",   // 13. GetInstantFor
   // RoundDuration
   "call options.relativeTo.calendar.dateAdd",  // 14.p MoveRelativeDate
+  // MoveRelativeZonedDateTime → AddZonedDateTime
+  "call options.relativeTo.calendar.dateAdd",
+  "call options.relativeTo.timeZone.getPossibleInstantsFor",
   // BalanceDateDurationRelative
   "call options.relativeTo.calendar.dateAdd",    // 10.d
   "call options.relativeTo.calendar.dateUntil",  // 10.e
@@ -445,6 +451,9 @@ const expectedOpsForWeeksSpecialCase = expectedOpsForZonedRelativeTo.concat([
   "call options.relativeTo.timeZone.getPossibleInstantsFor",   // 13. GetInstantFor
   // RoundDuration
   "call options.relativeTo.calendar.dateAdd",  // 14.p MoveRelativeDate
+  // MoveRelativeZonedDateTime → AddZonedDateTime
+  "call options.relativeTo.calendar.dateAdd",
+  "call options.relativeTo.timeZone.getPossibleInstantsFor",
 ]);
 new Temporal.Duration(0, 1, 1).round(createOptionsObserver({ largestUnit: "months", smallestUnit: "weeks", relativeTo: zonedRelativeTo }));
 assert.compareArray(
diff --git a/test/built-ins/Temporal/Duration/prototype/round/relativeto-propertybag-getpossibleinstantsfor-called-with-iso8601-calendar.js b/test/built-ins/Temporal/Duration/prototype/round/relativeto-propertybag-getpossibleinstantsfor-called-with-iso8601-calendar.js
index 1ef0125cb28..99ba61bb4b8 100644
--- a/test/built-ins/Temporal/Duration/prototype/round/relativeto-propertybag-getpossibleinstantsfor-called-with-iso8601-calendar.js
+++ b/test/built-ins/Temporal/Duration/prototype/round/relativeto-propertybag-getpossibleinstantsfor-called-with-iso8601-calendar.js
@@ -53,4 +53,4 @@ const relativeTo = { year: 2000, month: 5, day: 2, timeZone, calendar: nonBuilti
 const instance = new Temporal.Duration(1, 0, 0, 0, 24);
 instance.round({ largestUnit: "years", relativeTo });
 
-assert.sameValue(timeZone.calls, 6, "getPossibleInstantsFor should have been called 6 times");
+assert.sameValue(timeZone.calls, 8, "getPossibleInstantsFor should have been called 8 times");
diff --git a/test/built-ins/Temporal/Duration/prototype/round/timezone-getpossibleinstantsfor-iterable.js b/test/built-ins/Temporal/Duration/prototype/round/timezone-getpossibleinstantsfor-iterable.js
index 1838425cb15..26d685aba63 100644
--- a/test/built-ins/Temporal/Duration/prototype/round/timezone-getpossibleinstantsfor-iterable.js
+++ b/test/built-ins/Temporal/Duration/prototype/round/timezone-getpossibleinstantsfor-iterable.js
@@ -36,6 +36,7 @@ const expected = [
   "2000-01-01T00:00:00", // called once on the input relativeTo object
   "2001-02-09T00:00:00", // called once on relativeTo plus years, months, weeks, days from the receiver
   "2001-02-10T00:00:00", // called once on the previous value plus the calendar days difference between that and the time part of the duration
+  "2001-02-01T00:00:00", // called once in the balancing step on intermediate relativeTo
 ];
 
 TemporalHelpers.checkTimeZonePossibleInstantsIterable((timeZone) => {
diff --git a/test/built-ins/Temporal/Duration/prototype/total/dst-balancing-result.js b/test/built-ins/Temporal/Duration/prototype/total/dst-balancing-result.js
new file mode 100644
index 00000000000..132c68589cc
--- /dev/null
+++ b/test/built-ins/Temporal/Duration/prototype/total/dst-balancing-result.js
@@ -0,0 +1,21 @@
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-temporal.duration.prototype.total
+description: >
+    Balancing the resulting duration takes the time zone's UTC offset shifts
+    into account
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+// Based on a test case by Adam Shaw
+
+const duration = new Temporal.Duration(1, 0, 0, 0, 24);
+const timeZone = TemporalHelpers.springForwardFallBackTimeZone();
+const relativeTo = new Temporal.ZonedDateTime(
+    941184000_000_000_000n /* = 1999-10-29T08Z */,
+    timeZone); /* = 1999-10-29T00-08 in local time */
+
+const result = duration.total({ unit: "days", relativeTo });
+assert.sameValue(result, 366.96, "24 hours does not balance to 1 day in 25-hour day");
diff --git a/test/built-ins/Temporal/ZonedDateTime/prototype/since/dst-balancing-result.js b/test/built-ins/Temporal/ZonedDateTime/prototype/since/dst-balancing-result.js
new file mode 100644
index 00000000000..1cca27eb9ee
--- /dev/null
+++ b/test/built-ins/Temporal/ZonedDateTime/prototype/since/dst-balancing-result.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-temporal.zoneddatetime.prototype.since
+description: >
+    Balancing the resulting duration takes the time zone's UTC offset shifts
+    into account
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const timeZone = TemporalHelpers.springForwardFallBackTimeZone();
+
+// Based on a test case by Adam Shaw
+{
+    const start = new Temporal.ZonedDateTime(
+        941184000_000_000_000n /* = 1999-10-29T08Z */,
+        timeZone); /* = 1999-10-29T00-08 in local time */
+    const end = new Temporal.ZonedDateTime(
+        972889200_000_000_000n /* = 2000-10-30T07Z */,
+        timeZone); /* = 2000-10-29T23-08 in local time */
+
+    const duration = start.since(end, { largestUnit: "years" });
+    TemporalHelpers.assertDuration(duration, -1, 0, 0, 0, -24, 0, 0, 0, 0, 0,
+        "24 hours does not balance to 1 day in 25-hour day");
+}
diff --git a/test/built-ins/Temporal/ZonedDateTime/prototype/until/dst-balancing-result.js b/test/built-ins/Temporal/ZonedDateTime/prototype/until/dst-balancing-result.js
new file mode 100644
index 00000000000..0bdf261f09d
--- /dev/null
+++ b/test/built-ins/Temporal/ZonedDateTime/prototype/until/dst-balancing-result.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-temporal.zoneddatetime.prototype.until
+description: >
+    Balancing the resulting duration takes the time zone's UTC offset shifts
+    into account
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const timeZone = TemporalHelpers.springForwardFallBackTimeZone();
+
+// Based on a test case by Adam Shaw
+{
+    const start = new Temporal.ZonedDateTime(
+        941184000_000_000_000n /* = 1999-10-29T08Z */,
+        timeZone); /* = 1999-10-29T00-08 in local time */
+    const end = new Temporal.ZonedDateTime(
+        972889200_000_000_000n /* = 2000-10-30T07Z */,
+        timeZone); /* = 2000-10-29T23-08 in local time */
+
+    const duration = start.until(end, { largestUnit: "years" });
+    TemporalHelpers.assertDuration(duration, 1, 0, 0, 0, 24, 0, 0, 0, 0, 0,
+        "24 hours does not balance to 1 day in 25-hour day");
+}
diff --git a/test/intl402/Temporal/Duration/prototype/round/relativeto-string-datetime.js b/test/intl402/Temporal/Duration/prototype/round/relativeto-string-datetime.js
index 3d4f118549c..3ec0960f4f0 100644
--- a/test/intl402/Temporal/Duration/prototype/round/relativeto-string-datetime.js
+++ b/test/intl402/Temporal/Duration/prototype/round/relativeto-string-datetime.js
@@ -14,15 +14,15 @@ const instance = new Temporal.Duration(1, 0, 0, 0, 24);
 
 let relativeTo = "2019-11-01T00:00[America/Vancouver]";
 const result4 = instance.round({ largestUnit: "years", relativeTo });
-TemporalHelpers.assertDuration(result4, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, "date-time + IANA annotation is a zoned relativeTo");
+TemporalHelpers.assertDuration(result4, 1, 0, 0, 0, 24, 0, 0, 0, 0, 0, "date-time + IANA annotation is a zoned relativeTo");
 
 relativeTo = "2019-11-01T00:00Z[America/Vancouver]";
 const result5 = instance.round({ largestUnit: "years", relativeTo });
-TemporalHelpers.assertDuration(result5, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, "date-time + Z + IANA annotation is a zoned relativeTo");
+TemporalHelpers.assertDuration(result5, 1, 0, 0, 0, 24, 0, 0, 0, 0, 0, "date-time + Z + IANA annotation is a zoned relativeTo");
 
 relativeTo = "2019-11-01T00:00-07:00[America/Vancouver]";
 const result6 = instance.round({ largestUnit: "years", relativeTo });
-TemporalHelpers.assertDuration(result6, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, "date-time + offset + IANA annotation is a zoned relativeTo");
+TemporalHelpers.assertDuration(result6, 1, 0, 0, 0, 24, 0, 0, 0, 0, 0, "date-time + offset + IANA annotation is a zoned relativeTo");
 
 relativeTo = "2019-11-01T00:00+04:15[America/Vancouver]";
 assert.throws(RangeError, () => instance.round({ largestUnit: "years", relativeTo }), "date-time + offset + IANA annotation throws if wall time and exact time mismatch");