diff --git a/test/intl402/Temporal/Now/zonedDateTimeISO/timezone-string-datetime.js b/test/intl402/Temporal/Now/zonedDateTimeISO/timezone-string-datetime.js
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+++ b/test/intl402/Temporal/Now/zonedDateTimeISO/timezone-string-datetime.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2021 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: Conversion of ISO date-time strings to Temporal.TimeZone instances
+features: [Temporal]
+---*/
+
+let timeZone = "2021-08-19T17:30";
+assert.throws(RangeError, () => Temporal.Now.zonedDateTimeISO(timeZone), "bare date-time string is not a time zone");
+assert.throws(RangeError, () => Temporal.Now.zonedDateTimeISO({ timeZone }), "bare date-time string is not a time zone");
+
+timeZone = "2021-08-19T17:30Z";
+const result1 = Temporal.Now.zonedDateTimeISO(timeZone);
+assert.sameValue(result1.timeZone.id, "UTC", "date-time + Z is UTC time zone");
+const result2 = Temporal.Now.zonedDateTimeISO({ timeZone });
+assert.sameValue(result2.timeZone.id, "UTC", "date-time + Z is UTC time zone (string in property bag)");
+
+timeZone = "2021-08-19T17:30-07:00";
+const result3 = Temporal.Now.zonedDateTimeISO(timeZone);
+assert.sameValue(result3.timeZone.id, "-07:00", "date-time + offset is the offset time zone");
+const result4 = Temporal.Now.zonedDateTimeISO({ timeZone });
+assert.sameValue(result4.timeZone.id, "-07:00", "date-time + offset is the offset time zone (string in property bag)");
+
+timeZone = "2021-08-19T17:30-0700";
+const result5 = Temporal.Now.zonedDateTimeISO(timeZone);
+assert.sameValue(result5.timeZone.id, "-07:00", "date-time + offset is the offset time zone");
+const result6 = Temporal.Now.zonedDateTimeISO({ timeZone });
+assert.sameValue(result6.timeZone.id, "-07:00", "date-time + offset is the offset time zone (string in property bag)");
+
+timeZone = "2021-08-19T17:30[America/Vancouver]";
+const result7 = Temporal.Now.zonedDateTimeISO(timeZone);
+assert.sameValue(result7.timeZone.id, "America/Vancouver", "date-time + IANA annotation is the IANA time zone");
+const result8 = Temporal.Now.zonedDateTimeISO({ timeZone });
+assert.sameValue(result8.timeZone.id, "America/Vancouver", "date-time + IANA annotation is the IANA time zone (string in property bag)");
+
+timeZone = "2021-08-19T17:30Z[America/Vancouver]";
+const result9 = Temporal.Now.zonedDateTimeISO(timeZone);
+assert.sameValue(result9.timeZone.id, "America/Vancouver", "date-time + Z + IANA annotation is the IANA time zone");
+const result10 = Temporal.Now.zonedDateTimeISO({ timeZone });
+assert.sameValue(result10.timeZone.id, "America/Vancouver", "date-time + Z + IANA annotation is the IANA time zone (string in property bag)");
+
+timeZone = "2021-08-19T17:30-07:00[America/Vancouver]";
+const result11 = Temporal.Now.zonedDateTimeISO(timeZone);
+assert.sameValue(result11.timeZone.id, "America/Vancouver", "date-time + offset + IANA annotation is the IANA time zone");
+const result12 = Temporal.Now.zonedDateTimeISO({ timeZone });
+assert.sameValue(result12.timeZone.id, "America/Vancouver", "date-time + offset + IANA annotation is the IANA time zone (string in property bag)");
+
+timeZone = "2021-08-19T17:30-0700[America/Vancouver]";
+const result13 = Temporal.Now.zonedDateTimeISO(timeZone);
+assert.sameValue(result13.timeZone.id, "America/Vancouver", "date-time + offset + IANA annotation is the IANA time zone");
+const result14 = Temporal.Now.zonedDateTimeISO({ timeZone });
+assert.sameValue(result14.timeZone.id, "America/Vancouver", "date-time + offset + IANA annotation is the IANA time zone (string in property bag)");