diff --git a/test/built-ins/Temporal/Calendar/prototype/mergeFields/non-string-properties.js b/test/built-ins/Temporal/Calendar/prototype/mergeFields/non-string-properties.js
index 2a48dbf62c..68f861c1f7 100644
--- a/test/built-ins/Temporal/Calendar/prototype/mergeFields/non-string-properties.js
+++ b/test/built-ins/Temporal/Calendar/prototype/mergeFields/non-string-properties.js
@@ -4,7 +4,7 @@
 
 /*---
 esid: sec-temporal.calendar.prototype.mergefields
-description: Only string keys from the arguments are merged
+description: Both string and symbol keys from the arguments are merged
 info: |
   1. Let calendar be the this value.
   2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
@@ -50,6 +50,6 @@ const foo = Symbol("foo");
 const bar = Symbol("bar");
 assertEntriesEqual(
   cal.mergeFields({ [foo]: 1 }, { [bar]: 2 }),
-  [],
-  "symbol keys are not merged"
+  [[foo, 1], [bar, 2]],
+  "symbol keys are also merged"
 );
diff --git a/test/built-ins/Temporal/Calendar/prototype/mergeFields/order-of-operations.js b/test/built-ins/Temporal/Calendar/prototype/mergeFields/order-of-operations.js
new file mode 100644
index 0000000000..7bc01a5736
--- /dev/null
+++ b/test/built-ins/Temporal/Calendar/prototype/mergeFields/order-of-operations.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2022 Igalia S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.mergefields
+description: Properties on objects passed to mergeFields() are accessed in the correct order
+features: [Temporal]
+includes: [compareArray.js, temporalHelpers.js]
+---*/
+
+const expected = [
+  "ownKeys fields",
+  "getOwnPropertyDescriptor fields.year",
+  "get fields.year",
+  "getOwnPropertyDescriptor fields.month",
+  "get fields.month",
+  "getOwnPropertyDescriptor fields.day",
+  "get fields.day",
+  "getOwnPropertyDescriptor fields.extra",
+  "get fields.extra",
+  "ownKeys additionalFields",
+  "getOwnPropertyDescriptor additionalFields.3",
+  "get additionalFields.3",
+  "getOwnPropertyDescriptor additionalFields.monthCode",
+  "get additionalFields.monthCode",
+  "getOwnPropertyDescriptor additionalFields[Symbol('extra')]",
+  "get additionalFields[Symbol('extra')]",
+];
+const actual = [];
+
+const fields = TemporalHelpers.propertyBagObserver(actual, {
+  year: 2022,
+  month: 10,
+  day: 17,
+  extra: "extra property",
+}, "fields");
+const additionalFields = TemporalHelpers.propertyBagObserver(actual, {
+  [Symbol("extra")]: "extra symbol property",
+  monthCode: "M10",
+  3: "extra array index property",
+}, "additionalFields");
+
+const instance = new Temporal.Calendar("iso8601");
+instance.mergeFields(fields, additionalFields);
+assert.compareArray(actual, expected, "order of observable operations");