diff --git a/test/intl402/DurationFormat/instance/length.js b/test/intl402/DurationFormat/instance/length.js
index 239392cbad..529a1ec87f 100644
--- a/test/intl402/DurationFormat/instance/length.js
+++ b/test/intl402/DurationFormat/instance/length.js
@@ -27,6 +27,8 @@ includes: [propertyHelper.js]
 
 assert.sameValue(Intl.DurationFormat.length, 0);
 
-verifyNotEnumerable(Intl.DurationFormat, "length");
-verifyNotWritable(Intl.DurationFormat, "length");
-verifyConfigurable(Intl.DurationFormat, "length");
+verifyProperty(Intl.DurationFormat, 'length', {
+  enumerable: false,
+  writable: false,
+  configurable: true
+});
diff --git a/test/intl402/DurationFormat/instance/name.js b/test/intl402/DurationFormat/instance/name.js
index dd9967e50a..3a864201c7 100644
--- a/test/intl402/DurationFormat/instance/name.js
+++ b/test/intl402/DurationFormat/instance/name.js
@@ -23,6 +23,8 @@ includes: [propertyHelper.js]
 
 assert.sameValue(Intl.DurationFormat.name, "DurationFormat");
 
-verifyNotEnumerable(Intl.DurationFormat, "name");
-verifyNotWritable(Intl.DurationFormat, "name");
-verifyConfigurable(Intl.DurationFormat, "name");
+verifyProperty(Intl.DurationFormat, 'name', {
+  enumerable: false,
+  writable: false,
+  configurable: true
+});
diff --git a/test/intl402/DurationFormat/instance/prop-desc.js b/test/intl402/DurationFormat/instance/prop-desc.js
index da035e8ec4..00bbbd929d 100644
--- a/test/intl402/DurationFormat/instance/prop-desc.js
+++ b/test/intl402/DurationFormat/instance/prop-desc.js
@@ -25,6 +25,8 @@ features: [Intl.DurationFormat]
 includes: [propertyHelper.js]
 ---*/
 
-verifyNotEnumerable(Intl, "DurationFormat");
-verifyWritable(Intl, "DurationFormat");
-verifyConfigurable(Intl, "DurationFormat");
+verifyProperty(Intl, 'DurationFormat', {
+  enumerable: false,
+  writable: true,
+  configurable: true
+});
diff --git a/test/intl402/DurationFormat/prototype/format/length.js b/test/intl402/DurationFormat/prototype/format/length.js
index 94bfeb3499..14d7140573 100644
--- a/test/intl402/DurationFormat/prototype/format/length.js
+++ b/test/intl402/DurationFormat/prototype/format/length.js
@@ -21,6 +21,7 @@ info: |
     object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
     [[Configurable]]: true }.
 
+features: [Intl.DurationFormat]
 includes: [propertyHelper.js]
 ---*/
 
diff --git a/test/intl402/DurationFormat/prototype/formatToParts/length.js b/test/intl402/DurationFormat/prototype/formatToParts/length.js
index edc21dab52..8b54fc2ad4 100644
--- a/test/intl402/DurationFormat/prototype/formatToParts/length.js
+++ b/test/intl402/DurationFormat/prototype/formatToParts/length.js
@@ -21,6 +21,7 @@ info: |
     object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
     [[Configurable]]: true }.
 
+features: [Intl.DurationFormat]
 includes: [propertyHelper.js]
 ---*/
 
diff --git a/test/intl402/DurationFormat/prototype/resolvedOptions/length.js b/test/intl402/DurationFormat/prototype/resolvedOptions/length.js
index dfae25b004..a2a7b05342 100644
--- a/test/intl402/DurationFormat/prototype/resolvedOptions/length.js
+++ b/test/intl402/DurationFormat/prototype/resolvedOptions/length.js
@@ -21,6 +21,7 @@ info: |
     object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
     [[Configurable]]: true }.
 
+features: [Intl.DurationFormat]
 includes: [propertyHelper.js]
 ---*/