diff --git a/test/built-ins/Temporal/Duration/compare/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Duration/compare/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..62086da857
--- /dev/null
+++ b/test/built-ins/Temporal/Duration/compare/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.duration.compare
+description: >
+  A Temporal.TimeZone instance passed to compare() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+Temporal.Duration.compare(new Temporal.Duration(), new Temporal.Duration(), { relativeTo: { year: 2000, month: 5, day: 2, timeZone } });
+Temporal.Duration.compare(new Temporal.Duration(), new Temporal.Duration(), { relativeTo: { year: 2000, month: 5, day: 2, timeZone: { timeZone } } });
diff --git a/test/built-ins/Temporal/Duration/prototype/add/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Duration/prototype/add/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..643acc2572
--- /dev/null
+++ b/test/built-ins/Temporal/Duration/prototype/add/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.duration.prototype.add
+description: >
+  A Temporal.TimeZone instance passed to add() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Duration(1);
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.add(new Temporal.Duration(1), { relativeTo: { year: 2000, month: 5, day: 2, timeZone } });
+instance.add(new Temporal.Duration(1), { relativeTo: { year: 2000, month: 5, day: 2, timeZone: { timeZone } } });
diff --git a/test/built-ins/Temporal/Duration/prototype/round/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Duration/prototype/round/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..0f0cb9ff21
--- /dev/null
+++ b/test/built-ins/Temporal/Duration/prototype/round/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.duration.prototype.round
+description: >
+  A Temporal.TimeZone instance passed to round() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Duration(1);
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.round({ largestUnit: "months", relativeTo: { year: 2000, month: 5, day: 2, timeZone } });
+instance.round({ largestUnit: "months", relativeTo: { year: 2000, month: 5, day: 2, timeZone: { timeZone } } });
diff --git a/test/built-ins/Temporal/Duration/prototype/subtract/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Duration/prototype/subtract/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..b4a92890a5
--- /dev/null
+++ b/test/built-ins/Temporal/Duration/prototype/subtract/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.duration.prototype.subtract
+description: >
+  A Temporal.TimeZone instance passed to subtract() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Duration(1);
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.subtract(new Temporal.Duration(1), { relativeTo: { year: 2000, month: 5, day: 2, timeZone } });
+instance.subtract(new Temporal.Duration(1), { relativeTo: { year: 2000, month: 5, day: 2, timeZone: { timeZone } } });
diff --git a/test/built-ins/Temporal/Duration/prototype/total/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Duration/prototype/total/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..2ca7ed5f55
--- /dev/null
+++ b/test/built-ins/Temporal/Duration/prototype/total/relativeto-propertybag-timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.duration.prototype.total
+description: >
+  A Temporal.TimeZone instance passed to total() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Duration(1);
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.total({ unit: "months", relativeTo: { year: 2000, month: 5, day: 2, timeZone } });
+instance.total({ unit: "months", relativeTo: { year: 2000, month: 5, day: 2, timeZone: { timeZone } } });
diff --git a/test/built-ins/Temporal/Instant/prototype/toString/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Instant/prototype/toString/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..54e6309bc3
--- /dev/null
+++ b/test/built-ins/Temporal/Instant/prototype/toString/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.instant.prototype.tostring
+description: >
+  A Temporal.TimeZone instance passed to toString() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Instant(0n);
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.toString({ timeZone });
+instance.toString({ timeZone: { timeZone } });
diff --git a/test/built-ins/Temporal/Instant/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Instant/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..9d171db011
--- /dev/null
+++ b/test/built-ins/Temporal/Instant/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.instant.prototype.tozoneddatetime
+description: >
+  A Temporal.TimeZone instance passed to toZonedDateTime() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Instant(0n);
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.toZonedDateTime({ timeZone, calendar: "iso8601" });
+instance.toZonedDateTime({ timeZone: { timeZone }, calendar: "iso8601" });
diff --git a/test/built-ins/Temporal/Instant/prototype/toZonedDateTimeISO/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Instant/prototype/toZonedDateTimeISO/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..0753643e2a
--- /dev/null
+++ b/test/built-ins/Temporal/Instant/prototype/toZonedDateTimeISO/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.instant.prototype.tozoneddatetimeiso
+description: >
+  A Temporal.TimeZone instance passed to toZonedDateTimeISO() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Instant(0n);
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.toZonedDateTimeISO(timeZone);
+instance.toZonedDateTimeISO({ timeZone });
diff --git a/test/built-ins/Temporal/Now/plainDate/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Now/plainDate/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..36bf9b2cb1
--- /dev/null
+++ b/test/built-ins/Temporal/Now/plainDate/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.now.plaindate
+description: >
+  A Temporal.TimeZone instance passed to plainDate() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+Temporal.Now.plainDate("iso8601", timeZone);
+Temporal.Now.plainDate("iso8601", { timeZone });
diff --git a/test/built-ins/Temporal/Now/plainDateISO/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Now/plainDateISO/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..fdb608b647
--- /dev/null
+++ b/test/built-ins/Temporal/Now/plainDateISO/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.now.plaindateiso
+description: >
+  A Temporal.TimeZone instance passed to plainDateISO() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+Temporal.Now.plainDateISO(timeZone);
+Temporal.Now.plainDateISO({ timeZone });
diff --git a/test/built-ins/Temporal/Now/plainDateTime/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Now/plainDateTime/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..dcc4274edf
--- /dev/null
+++ b/test/built-ins/Temporal/Now/plainDateTime/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.now.plaindatetime
+description: >
+  A Temporal.TimeZone instance passed to plainDateTime() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+Temporal.Now.plainDateTime("iso8601", timeZone);
+Temporal.Now.plainDateTime("iso8601", { timeZone });
diff --git a/test/built-ins/Temporal/Now/plainDateTimeISO/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Now/plainDateTimeISO/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..3eb8199497
--- /dev/null
+++ b/test/built-ins/Temporal/Now/plainDateTimeISO/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.now.plaindatetimeiso
+description: >
+  A Temporal.TimeZone instance passed to plainDateTimeISO() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+Temporal.Now.plainDateTimeISO(timeZone);
+Temporal.Now.plainDateTimeISO({ timeZone });
diff --git a/test/built-ins/Temporal/Now/plainTimeISO/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Now/plainTimeISO/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..e49afec915
--- /dev/null
+++ b/test/built-ins/Temporal/Now/plainTimeISO/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.now.plaintimeiso
+description: >
+  A Temporal.TimeZone instance passed to plainTimeISO() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+Temporal.Now.plainTimeISO(timeZone);
+Temporal.Now.plainTimeISO({ timeZone });
diff --git a/test/built-ins/Temporal/Now/zonedDateTime/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Now/zonedDateTime/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..73a27dd9f2
--- /dev/null
+++ b/test/built-ins/Temporal/Now/zonedDateTime/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.now.zoneddatetime
+description: >
+  A Temporal.TimeZone instance passed to zonedDateTime() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+Temporal.Now.zonedDateTime("iso8601", timeZone);
+Temporal.Now.zonedDateTime("iso8601", { timeZone });
diff --git a/test/built-ins/Temporal/Now/zonedDateTimeISO/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/Now/zonedDateTimeISO/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..e65094d5e2
--- /dev/null
+++ b/test/built-ins/Temporal/Now/zonedDateTimeISO/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.now.zoneddatetimeiso
+description: >
+  A Temporal.TimeZone instance passed to zonedDateTimeISO() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+Temporal.Now.zonedDateTimeISO(timeZone);
+Temporal.Now.zonedDateTimeISO({ timeZone });
diff --git a/test/built-ins/Temporal/PlainDate/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/PlainDate/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..6a69b6ca7e
--- /dev/null
+++ b/test/built-ins/Temporal/PlainDate/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.plaindate.prototype.tozoneddatetime
+description: >
+  A Temporal.TimeZone instance passed to toZonedDateTime() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.PlainDate(2000, 5, 2);
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.toZonedDateTime(timeZone);
+instance.toZonedDateTime({ timeZone });
diff --git a/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..f9f6a4ede1
--- /dev/null
+++ b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.plaindatetime.prototype.tozoneddatetime
+description: >
+  A Temporal.TimeZone instance passed to toZonedDateTime() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.PlainDateTime(2000, 5, 2);
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.toZonedDateTime(timeZone);
+instance.toZonedDateTime({ timeZone });
diff --git a/test/built-ins/Temporal/PlainTime/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/PlainTime/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..75ecf010fd
--- /dev/null
+++ b/test/built-ins/Temporal/PlainTime/prototype/toZonedDateTime/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.plaintime.prototype.tozoneddatetime
+description: >
+  A Temporal.TimeZone instance passed to toZonedDateTime() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.PlainTime();
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.toZonedDateTime({ plainDate: new Temporal.PlainDate(2000, 5, 2), timeZone });
+instance.toZonedDateTime({ plainDate: new Temporal.PlainDate(2000, 5, 2), timeZone: { timeZone } });
diff --git a/test/built-ins/Temporal/TimeZone/from/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/TimeZone/from/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..38f519b518
--- /dev/null
+++ b/test/built-ins/Temporal/TimeZone/from/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.from
+description: >
+  A Temporal.TimeZone instance passed to from() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+Temporal.TimeZone.from(timeZone);
+Temporal.TimeZone.from({ timeZone });
diff --git a/test/built-ins/Temporal/ZonedDateTime/compare/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/ZonedDateTime/compare/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..0a2b360ac5
--- /dev/null
+++ b/test/built-ins/Temporal/ZonedDateTime/compare/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,23 @@
+// 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.zoneddatetime.compare
+description: >
+  A Temporal.TimeZone instance passed to compare() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+const arg1 = { year: 2020, month: 5, day: 2, timeZone };
+Temporal.ZonedDateTime.compare(arg1, arg1);
+
+const arg2 = { year: 2020, month: 5, day: 2, timeZone: { timeZone } };
+Temporal.ZonedDateTime.compare(arg2, arg2);
diff --git a/test/built-ins/Temporal/ZonedDateTime/from/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/ZonedDateTime/from/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..b8edbb9bd5
--- /dev/null
+++ b/test/built-ins/Temporal/ZonedDateTime/from/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.zoneddatetime.from
+description: >
+  A Temporal.TimeZone instance passed to from() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+Temporal.ZonedDateTime.from({ year: 2000, month: 5, day: 2, timeZone });
+Temporal.ZonedDateTime.from({ year: 2000, month: 5, day: 2, timeZone: { timeZone } });
diff --git a/test/built-ins/Temporal/ZonedDateTime/prototype/equals/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/ZonedDateTime/prototype/equals/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..092ee494ea
--- /dev/null
+++ b/test/built-ins/Temporal/ZonedDateTime/prototype/equals/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.zoneddatetime.prototype.equals
+description: >
+  A Temporal.TimeZone instance passed to equals() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.ZonedDateTime(0n, new Temporal.TimeZone("UTC"));
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.equals({ year: 2020, month: 5, day: 2, timeZone });
+instance.equals({ year: 2020, month: 5, day: 2, timeZone: { timeZone } });
diff --git a/test/built-ins/Temporal/ZonedDateTime/prototype/since/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/ZonedDateTime/prototype/since/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..dc1b28d6d6
--- /dev/null
+++ b/test/built-ins/Temporal/ZonedDateTime/prototype/since/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.zoneddatetime.prototype.since
+description: >
+  A Temporal.TimeZone instance passed to since() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.ZonedDateTime(0n, new Temporal.TimeZone("UTC"));
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.since({ year: 2020, month: 5, day: 2, timeZone });
+instance.since({ year: 2020, month: 5, day: 2, timeZone: { timeZone } });
diff --git a/test/built-ins/Temporal/ZonedDateTime/prototype/until/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/ZonedDateTime/prototype/until/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..f38e636c65
--- /dev/null
+++ b/test/built-ins/Temporal/ZonedDateTime/prototype/until/argument-propertybag-timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.zoneddatetime.prototype.until
+description: >
+  A Temporal.TimeZone instance passed to until() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.ZonedDateTime(0n, new Temporal.TimeZone("UTC"));
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.until({ year: 2020, month: 5, day: 2, timeZone });
+instance.until({ year: 2020, month: 5, day: 2, timeZone: { timeZone } });
diff --git a/test/built-ins/Temporal/ZonedDateTime/prototype/withTimeZone/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/ZonedDateTime/prototype/withTimeZone/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..2bd86e7e5b
--- /dev/null
+++ b/test/built-ins/Temporal/ZonedDateTime/prototype/withTimeZone/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,22 @@
+// 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.zoneddatetime.prototype.withtimezone
+description: >
+  A Temporal.TimeZone instance passed to withTimeZone() does not have its
+  'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const instance = new Temporal.ZonedDateTime(0n, new Temporal.TimeZone("UTC"));
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+instance.withTimeZone(timeZone);
+instance.withTimeZone({ timeZone });
diff --git a/test/built-ins/Temporal/ZonedDateTime/timezone-instance-does-not-get-timeZone-property.js b/test/built-ins/Temporal/ZonedDateTime/timezone-instance-does-not-get-timeZone-property.js
new file mode 100644
index 0000000000..c91da6c755
--- /dev/null
+++ b/test/built-ins/Temporal/ZonedDateTime/timezone-instance-does-not-get-timeZone-property.js
@@ -0,0 +1,20 @@
+// 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.zoneddatetime
+description: >
+  A Temporal.TimeZone instance passed to new ZonedDateTime() does not have
+  its 'timeZone' property observably checked
+features: [Temporal]
+---*/
+
+const timeZone = new Temporal.TimeZone("UTC");
+Object.defineProperty(timeZone, "timeZone", {
+  get() {
+    throw new Test262Error("timeZone.timeZone should not be accessed");
+  },
+});
+
+new Temporal.ZonedDateTime(0n, timeZone);
+new Temporal.ZonedDateTime(0n, { timeZone });