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diff --git a/js/src/tests/non262/TypedArray/reduce-and-reduceRight.js b/js/src/tests/non262/TypedArray/reduce-and-reduceRight.js
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+++ b/js/src/tests/non262/TypedArray/reduce-and-reduceRight.js
@@ -0,0 +1,188 @@
+// Tests for TypedArray#reduce.
+for (var constructor of anyTypedArrayConstructors) {
+    assertEq(constructor.prototype.reduce.length, 1);
+
+    // Basic tests.
+    var arr = new constructor([1, 2, 3, 4, 5]);
+
+    assertEq(arr.reduce((previous, current) => previous + current), 15);
+    assertEq(arr.reduce((previous, current) => current - previous), 3);
+
+    var count = 0;
+    var sum = 0;
+    assertEq(arr.reduce((previous, current, index, array) => {
+        count++;
+        sum += current;
+        assertEq(current - 1, index);
+        assertEq(current, arr[index]);
+        assertEq(array, arr);
+        return previous * current;
+    }), 120);
+    assertEq(count, 4);
+    assertEq(sum, 14);
+
+    // Tests for `initialValue` argument.
+    assertEq(arr.reduce((previous, current) => previous + current, -15), 0);
+    assertEq(arr.reduce((previous, current) => previous + current, ""), "12345");
+    assertDeepEq(arr.reduce((previous, current) => previous.concat(current), []), [1, 2, 3, 4, 5]);
+
+    // Tests for `this` value.
+    var global = this;
+    arr.reduce(function(){
+        assertEq(this, global);
+    });
+    arr.reduce(function(){
+        "use strict";
+        assertEq(this, undefined);
+    });
+    arr.reduce(() => assertEq(this, global));
+
+    // Throw an exception in the callback.
+    var count = 0;
+    var sum = 0;
+    assertThrowsInstanceOf(() => {
+        arr.reduce((previous, current, index, array) => {
+            count++;
+            sum += current;
+            if (index === 3) {
+                throw TypeError("reduce");
+            }
+        })
+    }, TypeError);
+    assertEq(count, 3);
+    assertEq(sum, 9);
+
+    // There is no callback or callback is not a function.
+    assertThrowsInstanceOf(() => {
+        arr.reduce();
+    }, TypeError);
+    var invalidCallbacks = [undefined, null, 1, false, "", Symbol(), [], {}, /./];
+    invalidCallbacks.forEach(callback => {
+        assertThrowsInstanceOf(() => {
+            arr.reduce(callback);
+        }, TypeError);
+    })
+
+    // Callback is a generator.
+    arr.reduce(function*(){
+        throw "This line will not be executed";
+    });
+
+    // Called from other globals.
+    if (typeof newGlobal === "function") {
+        var reduce = newGlobal()[constructor.name].prototype.reduce;
+        assertEq(reduce.call(arr, (previous, current) => Math.min(previous, current)), 1);
+    }
+
+    // Throws if `this` isn't a TypedArray.
+    var invalidReceivers = [undefined, null, 1, false, "", Symbol(), [], {}, /./,
+                            new Proxy(new constructor(3), {})];
+    invalidReceivers.forEach(invalidReceiver => {
+        assertThrowsInstanceOf(() => {
+            constructor.prototype.reduce.call(invalidReceiver, () => {});
+        }, TypeError, "Assert that reduce fails if this value is not a TypedArray");
+    });
+
+    // Test that the length getter is never called.
+    assertEq(Object.defineProperty(arr, "length", {
+        get() {
+            throw new Error("length accessor called");
+        }
+    }).reduce((previous, current) => Math.max(previous, current)), 5);
+}
+
+// Tests for TypedArray#reduceRight.
+for (var constructor of anyTypedArrayConstructors) {
+    assertEq(constructor.prototype.reduceRight.length, 1);
+
+    // Basic tests.
+    var arr = new constructor([1, 2, 3, 4, 5]);
+
+    assertEq(arr.reduceRight((previous, current) => previous + current), 15);
+    assertEq(arr.reduceRight((previous, current) => current - previous), 3);
+
+    var count = 0;
+    var sum = 0;
+    assertEq(arr.reduceRight((previous, current, index, array) => {
+        count++;
+        sum += current;
+        assertEq(current - 1, index);
+        assertEq(current, arr[index]);
+        assertEq(array, arr);
+        return previous * current;
+    }), 120);
+    assertEq(count, 4);
+    assertEq(sum, 10);
+
+    // Tests for `initialValue` argument.
+    assertEq(arr.reduceRight((previous, current) => previous + current, -15), 0);
+    assertEq(arr.reduceRight((previous, current) => previous + current, ""), "54321");
+    assertDeepEq(arr.reduceRight((previous, current) => previous.concat(current), []), [5, 4, 3, 2, 1]);
+
+    // Tests for `this` value.
+    var global = this;
+    arr.reduceRight(function(){
+        assertEq(this, global);
+    });
+    arr.reduceRight(function(){
+        "use strict";
+        assertEq(this, undefined);
+    });
+    arr.reduceRight(() => assertEq(this, global));
+
+    // Throw an exception in the callback.
+    var count = 0;
+    var sum = 0;
+    assertThrowsInstanceOf(() => {
+        arr.reduceRight((previous, current, index, array) => {
+            count++;
+            sum += current;
+            if (index === 1) {
+                throw TypeError("reduceRight");
+            }
+        })
+    }, TypeError);
+    assertEq(count, 3);
+    assertEq(sum, 9);
+
+    // There is no callback or callback is not a function.
+    assertThrowsInstanceOf(() => {
+        arr.reduceRight();
+    }, TypeError);
+    var invalidCallbacks = [undefined, null, 1, false, "", Symbol(), [], {}, /./];
+    invalidCallbacks.forEach(callback => {
+        assertThrowsInstanceOf(() => {
+            arr.reduceRight(callback);
+        }, TypeError);
+    })
+
+    // Callback is a generator.
+    arr.reduceRight(function*(){
+        throw "This line will not be executed";
+    });
+
+    // Called from other globals.
+    if (typeof newGlobal === "function") {
+        var reduceRight = newGlobal()[constructor.name].prototype.reduceRight;
+        assertEq(reduceRight.call(arr, (previous, current) => Math.min(previous, current)), 1);
+    }
+
+    // Throws if `this` isn't a TypedArray.
+    var invalidReceivers = [undefined, null, 1, false, "", Symbol(), [], {}, /./,
+                            new Proxy(new constructor(3), {})];
+    invalidReceivers.forEach(invalidReceiver => {
+        assertThrowsInstanceOf(() => {
+            constructor.prototype.reduceRight.call(invalidReceiver, () => {});
+        }, TypeError, "Assert that reduceRight fails if this value is not a TypedArray");
+    });
+
+    // Test that the length getter is never called.
+    assertEq(Object.defineProperty(arr, "length", {
+        get() {
+            throw new Error("length accessor called");
+        }
+    }).reduceRight((previous, current) => Math.max(previous, current)), 5);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);