diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.cpp
index 05f5fa47d9..d235c42e7b 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.cpp
@@ -213,8 +213,8 @@ JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::date_until)
     // 8. Let result be ! DifferenceISODate(one.[[ISOYear]], one.[[ISOMonth]], one.[[ISODay]], two.[[ISOYear]], two.[[ISOMonth]], two.[[ISODay]], largestUnit).
     auto result = difference_iso_date(global_object, one->iso_year(), one->iso_month(), one->iso_day(), two->iso_year(), two->iso_month(), two->iso_day(), *largest_unit);
 
-    // 9. Return ? CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0).
-    return TRY(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, 0, 0, 0, 0, 0, 0));
+    // 9. Return ! CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0).
+    return MUST(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, 0, 0, 0, 0, 0, 0));
 }
 
 // 12.4.9 Temporal.Calendar.prototype.year ( temporalDateLike ), https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.year
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp
index ea1c8b7919..177593b2f9 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp
@@ -310,8 +310,8 @@ JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::add)
     // 6. Let result be ? AddDuration(duration.[[Years]], duration.[[Months]], duration.[[Weeks]], duration.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], other.[[Years]], other.[[Months]], other.[[Weeks]], other.[[Days]], other.[[Hours]], other.[[Minutes]], other.[[Seconds]], other.[[Milliseconds]], other.[[Microseconds]], other.[[Nanoseconds]], relativeTo).
     auto result = TRY(add_duration(global_object, duration->years(), duration->months(), duration->weeks(), duration->days(), duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), duration->nanoseconds(), other.years, other.months, other.weeks, other.days, other.hours, other.minutes, other.seconds, other.milliseconds, other.microseconds, other.nanoseconds, relative_to));
 
-    // 7. Return ? CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
-    return TRY(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
+    // 7. Return ! CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
+    return MUST(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
 }
 
 // 7.3.19 Temporal.Duration.prototype.subtract ( other [ , options ] ), https://tc39.es/proposal-temporal/#sec-temporal.duration.prototype.subtract
@@ -333,8 +333,8 @@ JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::subtract)
     // 6. Let result be ? AddDuration(duration.[[Years]], duration.[[Months]], duration.[[Weeks]], duration.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], −other.[[Years]], −other.[[Months]], −other.[[Weeks]], −other.[[Days]], −other.[[Hours]], −other.[[Minutes]], −other.[[Seconds]], −other.[[Milliseconds]], −other.[[Microseconds]], −other.[[Nanoseconds]], relativeTo).
     auto result = TRY(add_duration(global_object, duration->years(), duration->months(), duration->weeks(), duration->days(), duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), duration->nanoseconds(), -other.years, -other.months, -other.weeks, -other.days, -other.hours, -other.minutes, -other.seconds, -other.milliseconds, -other.microseconds, -other.nanoseconds, relative_to));
 
-    // 7. Return ? CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
-    return TRY(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
+    // 7. Return ! CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
+    return MUST(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
 }
 
 // 7.3.20 Temporal.Duration.prototype.round ( roundTo ), https://tc39.es/proposal-temporal/#sec-temporal.duration.prototype.round
@@ -456,8 +456,8 @@ JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::round)
     auto* adjust_result_nanoseconds = js_bigint(vm, Crypto::SignedBigInteger::create_from(adjust_result.nanoseconds));
     auto result = TRY(balance_duration(global_object, balance_result.days, adjust_result.hours, adjust_result.minutes, adjust_result.seconds, adjust_result.milliseconds, adjust_result.microseconds, *adjust_result_nanoseconds, *largest_unit, relative_to.is_object() ? &relative_to.as_object() : nullptr));
 
-    // 27. Return ? CreateTemporalDuration(balanceResult.[[Years]], balanceResult.[[Months]], balanceResult.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
-    return TRY(create_temporal_duration(global_object, balance_result.years, balance_result.months, balance_result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
+    // 27. Return ! CreateTemporalDuration(balanceResult.[[Years]], balanceResult.[[Months]], balanceResult.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
+    return MUST(create_temporal_duration(global_object, balance_result.years, balance_result.months, balance_result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
 }
 
 // 7.3.21 Temporal.Duration.prototype.total ( totalOf ), https://tc39.es/proposal-temporal/#sec-temporal.duration.prototype.total
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp
index d423ef1c11..316da15cf7 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp
@@ -492,8 +492,8 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDatePrototype::until)
         result = TRY(round_duration(global_object, result.years, result.months, result.weeks, result.days, 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, temporal_date)).duration_record;
     }
 
-    // 16. Return ? CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0).
-    return TRY(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, 0, 0, 0, 0, 0, 0));
+    // 16. Return ! CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0).
+    return MUST(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, 0, 0, 0, 0, 0, 0));
 }
 
 // 3.3.24 Temporal.PlainDate.prototype.since ( other [ , options ] ), https://tc39.es/proposal-temporal/#sec-temporal.plaindate.prototype.since
@@ -541,20 +541,18 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDatePrototype::since)
     auto* until_options = TRY(merge_largest_unit_option(global_object, *options, move(*largest_unit)));
 
     // 15. Let result be ? CalendarDateUntil(temporalDate.[[Calendar]], temporalDate, other, untilOptions).
-    auto* result = TRY(calendar_date_until(global_object, temporal_date->calendar(), temporal_date, other, *until_options));
+    auto* duration = TRY(calendar_date_until(global_object, temporal_date->calendar(), temporal_date, other, *until_options));
 
-    // 16. If smallestUnit is "day" and roundingIncrement = 1, then
-    if (*smallest_unit == "day"sv && rounding_increment == 1) {
-        // a. Return ? CreateTemporalDuration(−result.[[Years]], −result.[[Months]], −result.[[Weeks]], −result.[[Days]], 0, 0, 0, 0, 0, 0).
-        return TRY(create_temporal_duration(global_object, -result->years(), -result->months(), -result->weeks(), -result->days(), 0, 0, 0, 0, 0, 0));
+    DurationRecord result { duration->years(), duration->months(), duration->weeks(), duration->days(), 0, 0, 0, 0, 0, 0 };
+
+    // 16. If smallestUnit is not "day" or roundingIncrement ≠ 1, then
+    if (*smallest_unit != "day"sv || rounding_increment != 1) {
+        // a. Set result to (? RoundDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, temporalDate)).[[DurationRecord]].
+        result = TRY(round_duration(global_object, result.years, result.months, result.weeks, result.days, 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, temporal_date)).duration_record;
     }
 
-    // 17. Set result to (? RoundDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, temporalDate)).[[DurationRecord]].
-    auto round_result = TRY(round_duration(global_object, result->years(), result->months(), result->weeks(), result->days(), 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, temporal_date)).duration_record;
-
-    // 18. Return ? CreateTemporalDuration(−result.[[Years]], −result.[[Months]], −result.[[Weeks]], −result.[[Days]], 0, 0, 0, 0, 0, 0).
-    // NOTE: `result` here refers to `round_result`.
-    return TRY(create_temporal_duration(global_object, -round_result.years, -round_result.months, -round_result.weeks, -round_result.days, 0, 0, 0, 0, 0, 0));
+    // 17. Return ! CreateTemporalDuration(−result.[[Years]], −result.[[Months]], −result.[[Weeks]], −result.[[Days]], 0, 0, 0, 0, 0, 0).
+    return TRY(create_temporal_duration(global_object, -result.years, -result.months, -result.weeks, -result.days, 0, 0, 0, 0, 0, 0));
 }
 
 // 3.3.25 Temporal.PlainDate.prototype.equals ( other ), https://tc39.es/proposal-temporal/#sec-temporal.plaindate.prototype.equals
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
index 681457197a..8001636281 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
@@ -1014,8 +1014,8 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::until)
     // 18. Let result be ? AdjustRoundedDurationDays(roundResult.[[Years]], roundResult.[[Months]], roundResult.[[Weeks]], roundResult.[[Days]], roundResult.[[Hours]], roundResult.[[Minutes]], roundResult.[[Seconds]], roundResult.[[Milliseconds]], roundResult.[[Microseconds]], roundResult.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, zonedDateTime).
     auto result = TRY(adjust_rounded_duration_days(global_object, round_result.years, round_result.months, round_result.weeks, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, round_result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, zoned_date_time));
 
-    // 19. Return ? CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
-    return TRY(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
+    // 19. Return ! CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
+    return MUST(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
 }
 
 // 6.3.38 Temporal.ZonedDateTime.prototype.since ( other [ , options ] ), https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.prototype.since
@@ -1091,8 +1091,8 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::since)
     // 19. Let result be ? AdjustRoundedDurationDays(roundResult.[[Years]], roundResult.[[Months]], roundResult.[[Weeks]], roundResult.[[Days]], roundResult.[[Hours]], roundResult.[[Minutes]], roundResult.[[Seconds]], roundResult.[[Milliseconds]], roundResult.[[Microseconds]], roundResult.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, zonedDateTime).
     auto result = TRY(adjust_rounded_duration_days(global_object, round_result.years, round_result.months, round_result.weeks, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, round_result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, zoned_date_time));
 
-    // 20. Return ? CreateTemporalDuration(−result.[[Years]], −result.[[Months]], −result.[[Weeks]], −result.[[Days]], −result.[[Hours]], −result.[[Minutes]], −result.[[Seconds]], −result.[[Milliseconds]], −result.[[Microseconds]], −result.[[Nanoseconds]]).
-    return TRY(create_temporal_duration(global_object, -result.years, -result.months, -result.weeks, -result.days, -result.hours, -result.minutes, -result.seconds, -result.milliseconds, -result.microseconds, -result.nanoseconds));
+    // 20. Return ! CreateTemporalDuration(−result.[[Years]], −result.[[Months]], −result.[[Weeks]], −result.[[Days]], −result.[[Hours]], −result.[[Minutes]], −result.[[Seconds]], −result.[[Milliseconds]], −result.[[Microseconds]], −result.[[Nanoseconds]]).
+    return MUST(create_temporal_duration(global_object, -result.years, -result.months, -result.weeks, -result.days, -result.hours, -result.minutes, -result.seconds, -result.milliseconds, -result.microseconds, -result.nanoseconds));
 }
 
 // 6.3.39 Temporal.ZonedDateTime.prototype.round ( roundTo ), https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.prototype.round