diff --git a/test/built-ins/Temporal/PlainDate/prototype/add/basic.js b/test/built-ins/Temporal/PlainDate/prototype/add/basic.js
new file mode 100644
index 0000000000..c9d6acb2e2
--- /dev/null
+++ b/test/built-ins/Temporal/PlainDate/prototype/add/basic.js
@@ -0,0 +1,29 @@
+// 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.add
+description: Basic tests
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const date = Temporal.PlainDate.from("1976-11-18");
+TemporalHelpers.assertPlainDate(date.add({ years: 43 }),
+  2019, 11, "M11", 18);
+TemporalHelpers.assertPlainDate(date.add({ months: 3 }),
+  1977, 2, "M02", 18);
+TemporalHelpers.assertPlainDate(date.add({ days: 20 }),
+  1976, 12, "M12", 8);
+TemporalHelpers.assertPlainDate(Temporal.PlainDate.from("2019-01-31").add({ months: 1 }),
+  2019, 2, "M02", 28);
+TemporalHelpers.assertPlainDate(date.add(Temporal.Duration.from('P43Y')),
+  2019, 11, "M11", 18);
+TemporalHelpers.assertPlainDate(Temporal.PlainDate.from('2019-11-18').add({ years: -43 }),
+  1976, 11, "M11", 18);
+TemporalHelpers.assertPlainDate(Temporal.PlainDate.from('1977-02-18').add({ months: -3 }),
+  1976, 11, "M11", 18);
+TemporalHelpers.assertPlainDate(Temporal.PlainDate.from('1976-12-08').add({ days: -20 }),
+  1976, 11, "M11", 18);
+TemporalHelpers.assertPlainDate(Temporal.PlainDate.from('2019-02-28').add({ months: -1 }),
+  2019, 1, "M01", 28);
diff --git a/test/built-ins/Temporal/PlainDate/prototype/subtract/basic.js b/test/built-ins/Temporal/PlainDate/prototype/subtract/basic.js
new file mode 100644
index 0000000000..be94cadac4
--- /dev/null
+++ b/test/built-ins/Temporal/PlainDate/prototype/subtract/basic.js
@@ -0,0 +1,29 @@
+// 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.subtract
+description: Basic tests
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const date = Temporal.PlainDate.from("2019-11-18");
+TemporalHelpers.assertPlainDate(date.subtract({ years: 43 }),
+  1976, 11, "M11", 18);
+TemporalHelpers.assertPlainDate(date.subtract({ months: 11 }),
+  2018, 12, "M12", 18);
+TemporalHelpers.assertPlainDate(date.subtract({ days: 20 }),
+  2019, 10, "M10", 29);
+TemporalHelpers.assertPlainDate(Temporal.PlainDate.from('2019-02-28').subtract({ months: 1 }),
+  2019, 1, "M01", 28);
+TemporalHelpers.assertPlainDate(date.subtract(Temporal.Duration.from('P43Y')),
+  1976, 11, "M11", 18);
+TemporalHelpers.assertPlainDate(Temporal.PlainDate.from('1976-11-18').subtract({ years: -43 }),
+  2019, 11, "M11", 18);
+TemporalHelpers.assertPlainDate(Temporal.PlainDate.from('2018-12-18').subtract({ months: -11 }),
+  2019, 11, "M11", 18);
+TemporalHelpers.assertPlainDate(Temporal.PlainDate.from('2019-10-29').subtract({ days: -20 }),
+  2019, 11, "M11", 18);
+TemporalHelpers.assertPlainDate(Temporal.PlainDate.from('2019-01-28').subtract({ months: -1 }),
+  2019, 2, "M02", 28);