diff --git a/harness/propertyHelper.js b/harness/propertyHelper.js
index ac273750f4..e63701b1ff 100644
--- a/harness/propertyHelper.js
+++ b/harness/propertyHelper.js
@@ -45,6 +45,19 @@ function verifyProperty(obj, name, desc, options) {
     return true;
   }
 
+  var names = Object.getOwnPropertyNames(desc);
+  for (var i = 0; i < names.length; i++) {
+    assert(
+      names[i] === "value" ||
+        names[i] === "writable" ||
+        names[i] === "enumerable" ||
+        names[i] === "configurable" ||
+        names[i] === "get" ||
+        names[i] === "set",
+      "Invalid descriptor field: " + names[i],
+    );
+  }
+
   assert(
     Object.prototype.hasOwnProperty.call(obj, name),
     "obj should have an own property " + nameStr
diff --git a/test/built-ins/ArrayBuffer/prototype/transfer/name.js b/test/built-ins/ArrayBuffer/prototype/transfer/name.js
index 2888f3be22..d870dc9c3f 100644
--- a/test/built-ins/ArrayBuffer/prototype/transfer/name.js
+++ b/test/built-ins/ArrayBuffer/prototype/transfer/name.js
@@ -22,6 +22,6 @@ includes: [propertyHelper.js]
 verifyProperty(ArrayBuffer.prototype.transfer, 'name', {
   value: 'transfer',
   enumerable: false,
-  wrtiable: false,
+  writable: false,
   configurable: true
 });
diff --git a/test/built-ins/ArrayBuffer/prototype/transferToFixedLength/name.js b/test/built-ins/ArrayBuffer/prototype/transferToFixedLength/name.js
index 159c80d18e..cca11b7f8e 100644
--- a/test/built-ins/ArrayBuffer/prototype/transferToFixedLength/name.js
+++ b/test/built-ins/ArrayBuffer/prototype/transferToFixedLength/name.js
@@ -22,6 +22,6 @@ includes: [propertyHelper.js]
 verifyProperty(ArrayBuffer.prototype.transferToFixedLength, 'name', {
   value: 'transferToFixedLength',
   enumerable: false,
-  wrtiable: false,
+  writable: false,
   configurable: true
 });
diff --git a/test/built-ins/Error/cause_property.js b/test/built-ins/Error/cause_property.js
index 87d631e072..f6dc47729f 100644
--- a/test/built-ins/Error/cause_property.js
+++ b/test/built-ins/Error/cause_property.js
@@ -29,7 +29,7 @@ var error = new Error(message, { cause });
 verifyProperty(error, "cause", {
   configurable: true,
   enumerable: false,
-  writeable: true,
+  writable: true,
   value: cause,
 });
 
diff --git a/test/built-ins/NativeErrors/AggregateError/cause-property.js b/test/built-ins/NativeErrors/AggregateError/cause-property.js
index 91b55ec11a..05e2cf0713 100644
--- a/test/built-ins/NativeErrors/AggregateError/cause-property.js
+++ b/test/built-ins/NativeErrors/AggregateError/cause-property.js
@@ -31,7 +31,7 @@ var error = new AggregateError(errors, message, { cause });
 verifyProperty(error, "cause", {
   configurable: true,
   enumerable: false,
-  writeable: true,
+  writable: true,
   value: cause,
 });
 
diff --git a/test/built-ins/NativeErrors/cause_property_native_error.js b/test/built-ins/NativeErrors/cause_property_native_error.js
index 637e7f10e2..f922bc1026 100644
--- a/test/built-ins/NativeErrors/cause_property_native_error.js
+++ b/test/built-ins/NativeErrors/cause_property_native_error.js
@@ -36,7 +36,7 @@ for (var i = 0; i < nativeErrors.length; ++i) {
   verifyProperty(error, "cause", {
     configurable: true,
     enumerable: false,
-    writeable: true,
+    writable: true,
     value: cause,
   });