diff --git a/test/intl402/Temporal/TimeZone/from/iana-legacy-names.js b/test/intl402/Temporal/TimeZone/from/iana-legacy-names.js
new file mode 100644
index 0000000000..00d360e9ef
--- /dev/null
+++ b/test/intl402/Temporal/TimeZone/from/iana-legacy-names.js
@@ -0,0 +1,24 @@
+// 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.timezone
+description: IANA legacy names must be supported
+features: [Temporal]
+---*/
+
+const legacyNames = [
+  ["Etc/GMT0", "UTC"],
+  ["GMT0", "UTC"],
+  ["GMT-0", "UTC"],
+  ["GMT+0", "UTC"],
+  ["EST5EDT", "EST5EDT"],
+  ["CST6CDT", "CST6CDT"],
+  ["MST7MDT", "MST7MDT"],
+  ["PST8PDT", "PST8PDT"],
+];
+
+legacyNames.forEach(([arg, expectedID]) => {
+  const tz = Temporal.TimeZone.from(arg);
+  assert.sameValue(tz.toString(), expectedID, `"${arg}" is a supported name for the "${expectedID}" time zone`);
+});
diff --git a/test/intl402/Temporal/TimeZone/iana-legacy-names.js b/test/intl402/Temporal/TimeZone/iana-legacy-names.js
new file mode 100644
index 0000000000..8b0a81f169
--- /dev/null
+++ b/test/intl402/Temporal/TimeZone/iana-legacy-names.js
@@ -0,0 +1,24 @@
+// 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.timezone
+description: IANA legacy names must be supported
+features: [Temporal]
+---*/
+
+const legacyNames = [
+  ["Etc/GMT0", "UTC"],
+  ["GMT0", "UTC"],
+  ["GMT-0", "UTC"],
+  ["GMT+0", "UTC"],
+  ["EST5EDT", "EST5EDT"],
+  ["CST6CDT", "CST6CDT"],
+  ["MST7MDT", "MST7MDT"],
+  ["PST8PDT", "PST8PDT"],
+];
+
+legacyNames.forEach(([arg, expectedID]) => {
+  const tz = new Temporal.TimeZone(arg);
+  assert.sameValue(tz.toString(), expectedID, `"${arg}" is a supported name for the "${expectedID}" time zone`);
+});