diff --git a/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/basic.js b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/basic.js
new file mode 100644
index 0000000000..5ced993fc5
--- /dev/null
+++ b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/basic.js
@@ -0,0 +1,15 @@
+// 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: Straightforward case of using UTC
+features: [Temporal]
+---*/
+
+const dt = new Temporal.PlainDateTime(2020, 1, 1, 0, 0);
+const zdt = dt.toZonedDateTime("UTC");
+
+assert.sameValue(zdt.epochNanoseconds, 1577836800000000000n, "nanoseconds");
+assert.sameValue(zdt.calendar.toString(), "iso8601", "calendar");
+assert.sameValue(zdt.timeZone, "UTC", "timezone");
diff --git a/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/disambiguation-invalid-string.js b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/disambiguation-invalid-string.js
index 65eab04c15..ab7127ce59 100644
--- a/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/disambiguation-invalid-string.js
+++ b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/disambiguation-invalid-string.js
@@ -16,4 +16,11 @@ features: [Temporal]
 
 const datetime = new Temporal.PlainDateTime(2001, 9, 9, 1, 46, 40, 987, 654, 321);
 const timeZone = new Temporal.TimeZone("UTC");
-assert.throws(RangeError, () => datetime.toZonedDateTime(timeZone, { disambiguation: "other string" }));
+const invalidStrings = ["obviously bad", "", "EARLIER", "earlıer", "late\u0131r", "reject\0"];
+invalidStrings.forEach((s) => {
+  assert.throws(
+    RangeError,
+    () => datetime.toZonedDateTime(timeZone, { disambiguation: s }),
+    `invalid disambiguation string (${s})`);
+});
+
diff --git a/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/invalid-instant.js b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/invalid-instant.js
new file mode 100644
index 0000000000..d1ec3c3d73
--- /dev/null
+++ b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/invalid-instant.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.plaindatetime.prototype.tozoneddatetime
+description: Convert to zoned datetime outside valid range
+features: [Temporal]
+---*/
+
+const max = new Temporal.PlainDateTime(275760, 9, 13, 23, 59, 59, 999, 999, 999);
+const min = new Temporal.PlainDateTime(-271821, 4, 19, 0, 0, 0, 0, 0, 1);
+
+assert.throws(
+  RangeError,
+  () => max.toZonedDateTime("UTC"),
+  "outside of Instant range (too big)"
+);
+
+assert.throws(
+  RangeError,
+  () => min.toZonedDateTime("UTC"),
+  "outside of Instant range (too small)"
+);
diff --git a/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/multiple-instants.js b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/multiple-instants.js
new file mode 100644
index 0000000000..5863513091
--- /dev/null
+++ b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/multiple-instants.js
@@ -0,0 +1,47 @@
+// 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: Checking disambiguation options for daylight savings time changes
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+const tz = TemporalHelpers.springForwardFallBackTimeZone();
+
+const dt1 = new Temporal.PlainDateTime(2000, 4, 2, 2);
+
+const zdt1 = dt1.toZonedDateTime(tz);
+const zdt1_compatible = dt1.toZonedDateTime(tz, { disambiguation: "compatible" });
+const zdt1_earlier = dt1.toZonedDateTime(tz, { disambiguation: "earlier" });
+const zdt1_later = dt1.toZonedDateTime(tz, { disambiguation: "later" });
+
+assert.sameValue(zdt1.epochNanoseconds, 954669600000000000n, "Fall DST (no disambiguation)");
+assert.sameValue(zdt1_compatible.epochNanoseconds, 954669600000000000n, "Fall DST (disambiguation = compatible)");
+assert.sameValue(zdt1_earlier.epochNanoseconds, 954666000000000000n, "Fall DST (disambiguation = earlier)");
+assert.sameValue(zdt1_later.epochNanoseconds, 954669600000000000n, "Fall DST (disambiguation = later)");
+
+assert.throws(
+  RangeError,
+  () => dt1.toZonedDateTime(tz, { disambiguation: "reject" }),
+  "Fall DST (disambiguation = reject)"
+);
+
+const dt2 = new Temporal.PlainDateTime(2000, 10, 29, 1);
+
+const zdt2 = dt2.toZonedDateTime(tz);
+const zdt2_compatible = dt2.toZonedDateTime(tz, { disambiguation: "compatible" });
+const zdt2_earlier = dt2.toZonedDateTime(tz, { disambiguation: "earlier" });
+const zdt2_later = dt2.toZonedDateTime(tz, { disambiguation: "later" });
+
+assert.sameValue(zdt2.epochNanoseconds, 972806400000000000n, "Spring DST (no disambiguation)");
+assert.sameValue(zdt2_compatible.epochNanoseconds, 972806400000000000n, "Spring DST (disambiguation = compatible)");
+assert.sameValue(zdt2_earlier.epochNanoseconds, 972806400000000000n, "Spring DST (disambiguation = earlier)");
+assert.sameValue(zdt2_later.epochNanoseconds, 972810000000000000n, "Spring DST (disambiguation = later)");
+
+assert.throws(
+  RangeError,
+  () => dt2.toZonedDateTime(tz, { disambiguation: "reject" }),
+  "Spring DST (disambiguation = reject)"
+);
diff --git a/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/options-object.js b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/options-object.js
new file mode 100644
index 0000000000..e7cd07013c
--- /dev/null
+++ b/test/built-ins/Temporal/PlainDateTime/prototype/toZonedDateTime/options-object.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: Empty object may be used as options
+features: [Temporal]
+---*/
+
+const dt = new Temporal.PlainDateTime(2019, 10, 29, 10, 46, 38, 271, 986, 102);
+
+assert.sameValue(
+  dt.toZonedDateTime("UTC", {}).epochNanoseconds,
+  1572345998271986102n,
+  "options may be an empty plain object"
+);
+
+assert.sameValue(
+  dt.toZonedDateTime("UTC", () => {}).epochNanoseconds,
+  1572345998271986102n,
+  "options may be a function object"
+);