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diff --git a/js/src/tests/test262/built-ins/FinalizationRegistry/newtarget-prototype-is-not-object.js b/js/src/tests/test262/built-ins/FinalizationRegistry/newtarget-prototype-is-not-object.js
new file mode 100644
index 0000000000..26b0e91221
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+++ b/js/src/tests/test262/built-ins/FinalizationRegistry/newtarget-prototype-is-not-object.js
@@ -0,0 +1,61 @@
+// |reftest| skip-if(!this.hasOwnProperty('FinalizationRegistry')) -- FinalizationRegistry is not enabled unconditionally
+// Copyright (C) 2019 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-finalization-registry-target
+description: >
+  [[Prototype]] defaults to %FinalizationRegistryPrototype% if NewTarget.prototype is not an object.
+info: |
+  FinalizationRegistry ( cleanupCallback )
+
+  ...
+  3. Let finalizationRegistry be ? OrdinaryCreateFromConstructor(NewTarget,  "%FinalizationRegistryPrototype%", « [[Realm]], [[CleanupCallback]], [[Cells]], [[IsFinalizationRegistryCleanupJobActive]] »).
+  ...
+  9. Return finalizationRegistry.
+
+  OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] )
+
+  ...
+  2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto).
+  3. Return ObjectCreate(proto, internalSlotsList).
+
+  GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
+
+  3. Let proto be ? Get(constructor, 'prototype').
+  4. If Type(proto) is not Object, then
+    a. Let realm be ? GetFunctionRealm(constructor).
+    b. Set proto to realm's intrinsic object named intrinsicDefaultProto.
+  5. Return proto.
+features: [FinalizationRegistry, Reflect.construct, Symbol]
+---*/
+
+var finalizationRegistry;
+function newTarget() {}
+function fn() {}
+
+newTarget.prototype = undefined;
+finalizationRegistry = Reflect.construct(FinalizationRegistry, [fn], newTarget);
+assert.sameValue(Object.getPrototypeOf(finalizationRegistry), FinalizationRegistry.prototype, 'newTarget.prototype is undefined');
+
+newTarget.prototype = null;
+finalizationRegistry = Reflect.construct(FinalizationRegistry, [fn], newTarget);
+assert.sameValue(Object.getPrototypeOf(finalizationRegistry), FinalizationRegistry.prototype, 'newTarget.prototype is null');
+
+newTarget.prototype = true;
+finalizationRegistry = Reflect.construct(FinalizationRegistry, [fn], newTarget);
+assert.sameValue(Object.getPrototypeOf(finalizationRegistry), FinalizationRegistry.prototype, 'newTarget.prototype is a Boolean');
+
+newTarget.prototype = '';
+finalizationRegistry = Reflect.construct(FinalizationRegistry, [fn], newTarget);
+assert.sameValue(Object.getPrototypeOf(finalizationRegistry), FinalizationRegistry.prototype, 'newTarget.prototype is a String');
+
+newTarget.prototype = Symbol();
+finalizationRegistry = Reflect.construct(FinalizationRegistry, [fn], newTarget);
+assert.sameValue(Object.getPrototypeOf(finalizationRegistry), FinalizationRegistry.prototype, 'newTarget.prototype is a Symbol');
+
+newTarget.prototype = 1;
+finalizationRegistry = Reflect.construct(FinalizationRegistry, [fn], newTarget);
+assert.sameValue(Object.getPrototypeOf(finalizationRegistry), FinalizationRegistry.prototype, 'newTarget.prototype is a Number');
+
+reportCompare(0, 0);