diff --git a/test/built-ins/TypedArrayConstructors/internals/Set/BigInt/key-is-canonical-invalid-index-prototype-chain-set.js b/test/built-ins/TypedArrayConstructors/internals/Set/BigInt/key-is-canonical-invalid-index-prototype-chain-set.js
new file mode 100644
index 0000000000..a329672afd
--- /dev/null
+++ b/test/built-ins/TypedArrayConstructors/internals/Set/BigInt/key-is-canonical-invalid-index-prototype-chain-set.js
@@ -0,0 +1,89 @@
+// Copyright (C) 2021 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-integer-indexed-exotic-objects-set-p-v-receiver
+description: >
+  If receiver is altered, `true` is returned for canonical numeric strings that are invalid indices.
+  Value is not coerced.
+info: |
+  [[Set]] ( P, V, Receiver )
+
+  [...]
+  2. If Type(P) is String, then
+    a. Let numericIndex be ! CanonicalNumericIndexString(P).
+    b. If numericIndex is not undefined, then
+      i. If ! SameValue(O, Receiver) is true
+        [...]
+      ii. 1. Else if ! IsValidIntegerIndex(_O_, _numericIndex_) is *false*, return *true*.
+includes: [testBigIntTypedArray.js]
+features: [BigInt, TypedArray, Proxy]
+---*/
+
+var valueOfCalls = 0;
+var value = {
+  valueOf: function() {
+    ++valueOfCalls;
+    return 2n;
+  },
+};
+
+testWithBigIntTypedArrayConstructors(function(TA) {
+  var target, receiver;
+
+  [1, 1.5, -1].forEach(function(key) {
+    Object.defineProperty(TA.prototype, key, {
+      get: function() { throw new Test262Error(key + " getter should be unreachable!"); },
+      set: function(_v) { throw new Test262Error(key + " setter should be unreachable!"); },
+      configurable: true,
+    });
+
+
+    target = new TA([0n]);
+    receiver = Object.create(target);
+    receiver[key] = value;
+    assert(!target.hasOwnProperty(key), "target[" + key + "] should not be created (receiver: empty object)");
+    assert(!receiver.hasOwnProperty(key), "receiver[" + key + "] should not be created (receiver: empty object)");
+
+
+    var proxyTrapCalls = 0;
+    target = new TA([0n]);
+    receiver = new Proxy(Object.create(target), {
+      defineProperty(_target, key, desc) {
+        ++proxyTrapCalls;
+        Object.defineProperty(_target, key, desc);
+        return true;
+      },
+    });
+    receiver[key] = value;
+    assert(!target.hasOwnProperty(key), "target[" + key + "] should not be created (receiver: proxy of an empty object)");
+    assert(!receiver.hasOwnProperty(key), "receiver[" + key + "] should not be created (receiver: proxy of an empty object)");
+    assert.sameValue(proxyTrapCalls, 0, "Proxy's [[DefineOwnProperty]] exotic method should not be called (key: " + key + ")");
+
+
+    target = new TA([0n]);
+    receiver = Object.preventExtensions(Object.create(target));
+    receiver[key] = value;
+    assert(!target.hasOwnProperty(key), "target[" + key + "] should not be created (receiver: non-extensible empty object)");
+    assert(!receiver.hasOwnProperty(key), "receiver[" + key + "] should not be created (receiver: non-extensible empty object)");
+
+
+    assert(delete TA.prototype[key]);
+  });
+
+
+  target = new TA([0n]);
+  receiver = Object.setPrototypeOf([], target);
+  receiver[1] = value;
+  assert(!target.hasOwnProperty(1), "target[1] should not be created (receiver: regular array)");
+  assert(!receiver.hasOwnProperty(1), "receiver[1] should not be created (receiver: regular array)");
+  assert.sameValue(receiver.length, 0, "Array's [[DefineOwnProperty]] exotic method should not be called");
+
+
+  target = new TA([0n]);
+  receiver = Object.setPrototypeOf(new String(""), target);
+  receiver[1] = value;
+  assert(!target.hasOwnProperty(1), "target[1] should not be created (receiver: empty String object)");
+  assert(!receiver.hasOwnProperty(1), "receiver[1] should remain unchanged (receiver: empty String object)");
+});
+
+assert.sameValue(valueOfCalls, 0, "value should not be coerced");
diff --git a/test/built-ins/TypedArrayConstructors/internals/Set/key-is-canonical-invalid-index-prototype-chain-set.js b/test/built-ins/TypedArrayConstructors/internals/Set/key-is-canonical-invalid-index-prototype-chain-set.js
new file mode 100644
index 0000000000..3771fe645e
--- /dev/null
+++ b/test/built-ins/TypedArrayConstructors/internals/Set/key-is-canonical-invalid-index-prototype-chain-set.js
@@ -0,0 +1,89 @@
+// Copyright (C) 2021 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-integer-indexed-exotic-objects-set-p-v-receiver
+description: >
+  If receiver is altered, `true` is returned for canonical numeric strings that are invalid indices.
+  Value is not coerced.
+info: |
+  [[Set]] ( P, V, Receiver )
+
+  [...]
+  2. If Type(P) is String, then
+    a. Let numericIndex be ! CanonicalNumericIndexString(P).
+    b. If numericIndex is not undefined, then
+      i. If ! SameValue(O, Receiver) is true
+        [...]
+      ii. 1. Else if ! IsValidIntegerIndex(_O_, _numericIndex_) is *false*, return *true*.
+includes: [testTypedArray.js]
+features: [TypedArray, Proxy]
+---*/
+
+var valueOfCalls = 0;
+var value = {
+  valueOf: function() {
+    ++valueOfCalls;
+    return 2.3;
+  },
+};
+
+testWithTypedArrayConstructors(function(TA) {
+  var target, receiver;
+
+  [1, 1.5, -1].forEach(function(key) {
+    Object.defineProperty(TA.prototype, key, {
+      get: function() { throw new Test262Error(key + " getter should be unreachable!"); },
+      set: function(_v) { throw new Test262Error(key + " setter should be unreachable!"); },
+      configurable: true,
+    });
+
+
+    target = new TA([0]);
+    receiver = Object.create(target);
+    receiver[key] = value;
+    assert(!target.hasOwnProperty(key), "target[" + key + "] should not be created (receiver: empty object)");
+    assert(!receiver.hasOwnProperty(key), "receiver[" + key + "] should not be created (receiver: empty object)");
+
+
+    var proxyTrapCalls = 0;
+    target = new TA([0]);
+    receiver = new Proxy(Object.create(target), {
+      defineProperty(_target, key, desc) {
+        ++proxyTrapCalls;
+        Object.defineProperty(_target, key, desc);
+        return true;
+      },
+    });
+    receiver[key] = value;
+    assert(!target.hasOwnProperty(key), "target[" + key + "] should not be created (receiver: proxy of an empty object)");
+    assert(!receiver.hasOwnProperty(key), "receiver[" + key + "] should not be created (receiver: proxy of an empty object)");
+    assert.sameValue(proxyTrapCalls, 0, "Proxy's [[DefineOwnProperty]] exotic method should not be called (key: " + key + ")");
+
+
+    target = new TA([0]);
+    receiver = Object.preventExtensions(Object.create(target));
+    receiver[key] = value;
+    assert(!target.hasOwnProperty(key), "target[" + key + "] should not be created (receiver: non-extensible empty object)");
+    assert(!receiver.hasOwnProperty(key), "receiver[" + key + "] should not be created (receiver: non-extensible empty object)");
+
+
+    assert(delete TA.prototype[key]);
+  });
+
+
+  target = new TA([0]);
+  receiver = Object.setPrototypeOf([], target);
+  receiver[1] = value;
+  assert(!target.hasOwnProperty(1), "target[1] should not be created (receiver: regular array)");
+  assert(!receiver.hasOwnProperty(1), "receiver[1] should not be created (receiver: regular array)");
+  assert.sameValue(receiver.length, 0, "Array's [[DefineOwnProperty]] exotic method should not be called");
+
+
+  target = new TA([0]);
+  receiver = Object.setPrototypeOf(new String(""), target);
+  receiver[1] = value;
+  assert(!target.hasOwnProperty(1), "target[1] should not be created (receiver: empty String object)");
+  assert(!receiver.hasOwnProperty(1), "receiver[1] should remain unchanged (receiver: empty String object)");
+});
+
+assert.sameValue(valueOfCalls, 0, "value should not be coerced");