diff --git a/test/built-ins/TypedArrayConstructors/BigInt64Array/prototype/not-typedarray-object.js b/test/built-ins/TypedArrayConstructors/BigInt64Array/prototype/not-typedarray-object.js
index 0e3269c48f..141d825120 100644
--- a/test/built-ins/TypedArrayConstructors/BigInt64Array/prototype/not-typedarray-object.js
+++ b/test/built-ins/TypedArrayConstructors/BigInt64Array/prototype/not-typedarray-object.js
@@ -12,7 +12,7 @@ info: |
   are specific to TypedArray instance objects.
 features: [BigInt]
 ---*/
-
+assert.sameValue(typeof BigInt64Array, 'function');
 assert.throws(TypeError, function () {
   BigInt64Array.prototype.buffer;
 });
diff --git a/test/built-ins/TypedArrayConstructors/BigUint64Array/prototype/not-typedarray-object.js b/test/built-ins/TypedArrayConstructors/BigUint64Array/prototype/not-typedarray-object.js
index aabe797e72..7629f46417 100644
--- a/test/built-ins/TypedArrayConstructors/BigUint64Array/prototype/not-typedarray-object.js
+++ b/test/built-ins/TypedArrayConstructors/BigUint64Array/prototype/not-typedarray-object.js
@@ -12,7 +12,7 @@ info: |
   are specific to TypedArray instance objects.
 features: [BigInt]
 ---*/
-
+assert.sameValue(typeof BigUint64Array, 'function');
 assert.throws(TypeError, function () {
   BigUint64Array.prototype.buffer;
 });