diff --git a/test/built-ins/Temporal/Duration/prototype/add/relativeto-string-zoneddatetime-wrong-offset.js b/test/built-ins/Temporal/Duration/prototype/add/relativeto-string-zoneddatetime-wrong-offset.js
index d40cf7fbac..cf8d26038c 100644
--- a/test/built-ins/Temporal/Duration/prototype/add/relativeto-string-zoneddatetime-wrong-offset.js
+++ b/test/built-ins/Temporal/Duration/prototype/add/relativeto-string-zoneddatetime-wrong-offset.js
@@ -9,4 +9,8 @@ features: [Temporal]
 
 const instance = new Temporal.Duration(1, 0, 0, 1);
 const relativeTo = "2000-01-01T00:00+05:30[UTC]";
-assert.throws(RangeError, () => instance.add(new Temporal.Duration(0, 0, 0, 0, -24), { relativeTo }));
+assert.throws(
+  RangeError,
+  () => instance.add(new Temporal.Duration(0, 0, 0, 0, -24), { relativeTo }),
+  "add should throw RangeError on a string with UTC offset mismatch"
+);
diff --git a/test/built-ins/Temporal/Duration/prototype/round/relativeto-string-zoneddatetime-wrong-offset.js b/test/built-ins/Temporal/Duration/prototype/round/relativeto-string-zoneddatetime-wrong-offset.js
index be9563773a..c494cf9a3f 100644
--- a/test/built-ins/Temporal/Duration/prototype/round/relativeto-string-zoneddatetime-wrong-offset.js
+++ b/test/built-ins/Temporal/Duration/prototype/round/relativeto-string-zoneddatetime-wrong-offset.js
@@ -9,4 +9,8 @@ features: [Temporal]
 
 const instance = new Temporal.Duration(1, 0, 0, 0, 24);
 const relativeTo = "2000-01-01T00:00+05:30[UTC]";
-assert.throws(RangeError, () => instance.round({ largestUnit: "years", relativeTo }));
+assert.throws(
+  RangeError,
+  () => instance.round({ largestUnit: "years", relativeTo }),
+  "round should throw RangeError on a string with UTC offset mismatch"
+);
diff --git a/test/built-ins/Temporal/Duration/prototype/subtract/relativeto-string-zoneddatetime-wrong-offset.js b/test/built-ins/Temporal/Duration/prototype/subtract/relativeto-string-zoneddatetime-wrong-offset.js
index 4fb8a1bf7e..148723fd2b 100644
--- a/test/built-ins/Temporal/Duration/prototype/subtract/relativeto-string-zoneddatetime-wrong-offset.js
+++ b/test/built-ins/Temporal/Duration/prototype/subtract/relativeto-string-zoneddatetime-wrong-offset.js
@@ -9,4 +9,8 @@ features: [Temporal]
 
 const instance = new Temporal.Duration(1, 0, 0, 1);
 const relativeTo = "2000-01-01T00:00+05:30[UTC]";
-assert.throws(RangeError, () => instance.subtract(new Temporal.Duration(0, 0, 0, 0, 24), { relativeTo }));
+assert.throws(
+  RangeError,
+  () => instance.subtract(new Temporal.Duration(0, 0, 0, 0, 24), { relativeTo }),
+  "subtract should throw RangeError on a string with UTC offset mismatch"
+);
diff --git a/test/built-ins/Temporal/Duration/prototype/total/relativeto-string-zoneddatetime-wrong-offset.js b/test/built-ins/Temporal/Duration/prototype/total/relativeto-string-zoneddatetime-wrong-offset.js
index 8cba689041..d512f1363e 100644
--- a/test/built-ins/Temporal/Duration/prototype/total/relativeto-string-zoneddatetime-wrong-offset.js
+++ b/test/built-ins/Temporal/Duration/prototype/total/relativeto-string-zoneddatetime-wrong-offset.js
@@ -9,4 +9,8 @@ features: [Temporal]
 
 const instance = new Temporal.Duration(1, 0, 0, 0, 24);
 const relativeTo = "2000-01-01T00:00+05:30[UTC]";
-assert.throws(RangeError, () => instance.total({ unit: "days", relativeTo }));
+assert.throws(
+  RangeError,
+  () => instance.total({ unit: "days", relativeTo }),
+  "total should throw RangeError on a string with UTC offset mismatch"
+);