diff --git a/test/annexB/built-ins/String/prototype/trimLeft/length.js b/test/annexB/built-ins/String/prototype/trimLeft/length.js
index 133c5ec034..7cf7285b70 100644
--- a/test/annexB/built-ins/String/prototype/trimLeft/length.js
+++ b/test/annexB/built-ins/String/prototype/trimLeft/length.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimLeft
 description: >
   String.prototype.trimLeft.length is 0.
 info: >
@@ -20,10 +20,12 @@ info: >
     object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
     [[Configurable]]: true }.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-assert.sameValue(String.prototype.trimLeft.length, 0);
-
-verifyNotEnumerable(String.prototype.trimLeft, "length");
-verifyNotWritable(String.prototype.trimLeft, "length");
-verifyConfigurable(String.prototype.trimLeft, "length");
+verifyProperty(String.prototype.trimLeft, "length", {
+  value: 0,
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
diff --git a/test/annexB/built-ins/String/prototype/trimLeft/name.js b/test/annexB/built-ins/String/prototype/trimLeft/name.js
index 75e33ad6af..d9509c3086 100644
--- a/test/annexB/built-ins/String/prototype/trimLeft/name.js
+++ b/test/annexB/built-ins/String/prototype/trimLeft/name.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimLeft
 description: >
   String.prototype.trimLeft.name is "trimLeft".
 info: >
@@ -17,10 +17,12 @@ info: >
     object, if it exists, has the attributes { [[Writable]]: false,
     [[Enumerable]]: false, [[Configurable]]: true }.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-assert.sameValue(String.prototype.trimLeft.name, "valueOf");
-
-verifyNotEnumerable(String.prototype.trimLeft, "name");
-verifyNotWritable(String.prototype.trimLeft, "name");
-verifyConfigurable(String.prototype.trimLeft, "name");
+verifyProperty(String.prototype.trimLeft, "name", {
+  value: "trimLeft",
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
diff --git a/test/annexB/built-ins/String/prototype/trimLeft/prop-desc.js b/test/annexB/built-ins/String/prototype/trimLeft/prop-desc.js
index 1155025873..90f5f355f7 100644
--- a/test/annexB/built-ins/String/prototype/trimLeft/prop-desc.js
+++ b/test/annexB/built-ins/String/prototype/trimLeft/prop-desc.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimLeft
 description: >
   "trimLeft" property of String.prototype
 info: >
@@ -12,8 +12,11 @@ info: >
   has the attributes { [[Writable]]: true, [[Enumerable]]: false,
   [[Configurable]]: true } unless otherwise specified.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-verifyNotEnumerable(String.prototype, "trimLeft");
-verifyWritable(String.prototype, "trimLeft");
-verifyConfigurable(String.prototype, "trimLeft);
+verifyProperty(String.prototype, "trimLeft", {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+});
diff --git a/test/annexB/built-ins/String/prototype/trimRight/length.js b/test/annexB/built-ins/String/prototype/trimRight/length.js
index 8392634261..0108341d7b 100644
--- a/test/annexB/built-ins/String/prototype/trimRight/length.js
+++ b/test/annexB/built-ins/String/prototype/trimRight/length.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimRight
 description: >
   String.prototype.trimRight.length is 0.
 info: >
@@ -20,10 +20,12 @@ info: >
     object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
     [[Configurable]]: true }.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-assert.sameValue(String.prototype.trimRight.length, 0);
-
-verifyNotEnumerable(String.prototype.trimRight, "length");
-verifyNotWritable(String.prototype.trimRight, "length");
-verifyConfigurable(String.prototype.trimRight, "length");
+verifyProperty(String.prototype.trimRight, "length", {
+  value: 0,
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
diff --git a/test/annexB/built-ins/String/prototype/trimRight/name.js b/test/annexB/built-ins/String/prototype/trimRight/name.js
index e5cea32442..14f6b494fc 100644
--- a/test/annexB/built-ins/String/prototype/trimRight/name.js
+++ b/test/annexB/built-ins/String/prototype/trimRight/name.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimRight
 description: >
   String.prototype.trimRight.name is "trimRight".
 info: >
@@ -17,10 +17,12 @@ info: >
     object, if it exists, has the attributes { [[Writable]]: false,
     [[Enumerable]]: false, [[Configurable]]: true }.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-assert.sameValue(String.prototype.trimRight.name, "valueOf");
-
-verifyNotEnumerable(String.prototype.trimRight, "name");
-verifyNotWritable(String.prototype.trimRight, "name");
-verifyConfigurable(String.prototype.trimRight, "name");
+verifyProperty(String.prototype.trimRight, "name", {
+  value: "trimRight",
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
diff --git a/test/annexB/built-ins/String/prototype/trimRight/prop-desc.js b/test/annexB/built-ins/String/prototype/trimRight/prop-desc.js
index fb3f81e0b0..9aad54d47d 100644
--- a/test/annexB/built-ins/String/prototype/trimRight/prop-desc.js
+++ b/test/annexB/built-ins/String/prototype/trimRight/prop-desc.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimRight
 description: >
   "trimRight" property of String.prototype
 info: >
@@ -12,8 +12,11 @@ info: >
   has the attributes { [[Writable]]: true, [[Enumerable]]: false,
   [[Configurable]]: true } unless otherwise specified.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-verifyNotEnumerable(String.prototype, "trimRight");
-verifyWritable(String.prototype, "trimRight");
-verifyConfigurable(String.prototype, "trimRight);
+verifyProperty(String.prototype, "trimRight", {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+});
diff --git a/test/built-ins/String/prototype/trimEnd/length.js b/test/built-ins/String/prototype/trimEnd/length.js
index a035d378b3..37c9fd8b82 100644
--- a/test/built-ins/String/prototype/trimEnd/length.js
+++ b/test/built-ins/String/prototype/trimEnd/length.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimEnd
 description: >
   String.prototype.trimEnd.length is 0.
 info: >
@@ -20,10 +20,12 @@ info: >
     object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
     [[Configurable]]: true }.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-assert.sameValue(String.prototype.trimEnd.length, 0);
-
-verifyNotEnumerable(String.prototype.trimEnd, "length");
-verifyNotWritable(String.prototype.trimEnd, "length");
-verifyConfigurable(String.prototype.trimEnd, "length");
+verifyProperty(String.prototype.trimEnd, "length", {
+  value: 0,
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
diff --git a/test/built-ins/String/prototype/trimEnd/name.js b/test/built-ins/String/prototype/trimEnd/name.js
index d76b00fcd0..6a0dc7aecc 100644
--- a/test/built-ins/String/prototype/trimEnd/name.js
+++ b/test/built-ins/String/prototype/trimEnd/name.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimEnd
 description: >
   String.prototype.trimEnd.name is "trimEnd".
 info: >
@@ -17,10 +17,12 @@ info: >
     object, if it exists, has the attributes { [[Writable]]: false,
     [[Enumerable]]: false, [[Configurable]]: true }.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-assert.sameValue(String.prototype.trimEnd.name, "valueOf");
-
-verifyNotEnumerable(String.prototype.trimEnd, "name");
-verifyNotWritable(String.prototype.trimEnd, "name");
-verifyConfigurable(String.prototype.trimEnd, "name");
+verifyProperty(String.prototype.trimEnd, "name", {
+  value: "trimEnd",
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
diff --git a/test/built-ins/String/prototype/trimEnd/prop-desc.js b/test/built-ins/String/prototype/trimEnd/prop-desc.js
index fad9eac35c..990e201b48 100644
--- a/test/built-ins/String/prototype/trimEnd/prop-desc.js
+++ b/test/built-ins/String/prototype/trimEnd/prop-desc.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimEnd
 description: >
   "trimEnd" property of String.prototype
 info: >
@@ -12,8 +12,11 @@ info: >
   has the attributes { [[Writable]]: true, [[Enumerable]]: false,
   [[Configurable]]: true } unless otherwise specified.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-verifyNotEnumerable(String.prototype, "trimEnd");
-verifyWritable(String.prototype, "trimEnd");
-verifyConfigurable(String.prototype, "trimEnd");
+verifyProperty(String.prototype, "trimEnd", {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+});
diff --git a/test/built-ins/String/prototype/trimStart/length.js b/test/built-ins/String/prototype/trimStart/length.js
index 0887a52c5b..43373b2cdc 100644
--- a/test/built-ins/String/prototype/trimStart/length.js
+++ b/test/built-ins/String/prototype/trimStart/length.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimStart
 description: >
   String.prototype.trimStart.length is 0.
 info: >
@@ -20,10 +20,12 @@ info: >
     object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
     [[Configurable]]: true }.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-assert.sameValue(String.prototype.trimStart.length, 0);
-
-verifyNotEnumerable(String.prototype.trimStart, "length");
-verifyNotWritable(String.prototype.trimStart, "length");
-verifyConfigurable(String.prototype.trimStart, "length");
+verifyProperty(String.prototype.trimStart, "length", {
+  value: 0,
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
diff --git a/test/built-ins/String/prototype/trimStart/name.js b/test/built-ins/String/prototype/trimStart/name.js
index 68e14ded40..60a3442af8 100644
--- a/test/built-ins/String/prototype/trimStart/name.js
+++ b/test/built-ins/String/prototype/trimStart/name.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimStart
 description: >
   String.prototype.trimStart.name is "trimStart".
 info: >
@@ -17,10 +17,12 @@ info: >
     object, if it exists, has the attributes { [[Writable]]: false,
     [[Enumerable]]: false, [[Configurable]]: true }.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-assert.sameValue(String.prototype.trimStart.name, "valueOf");
-
-verifyNotEnumerable(String.prototype.trimStart, "name");
-verifyNotWritable(String.prototype.trimStart, "name");
-verifyConfigurable(String.prototype.trimStart, "name");
+verifyProperty(String.prototype.trimStart, "name", {
+  value: "trimStart",
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
diff --git a/test/built-ins/String/prototype/trimStart/prop-desc.js b/test/built-ins/String/prototype/trimStart/prop-desc.js
index d2403dc15b..a7f55ab691 100644
--- a/test/built-ins/String/prototype/trimStart/prop-desc.js
+++ b/test/built-ins/String/prototype/trimStart/prop-desc.js
@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: pending
+esid: sec-string.prototype.trimStart
 description: >
   "trimStart" property of String.prototype
 info: >
@@ -12,8 +12,11 @@ info: >
   has the attributes { [[Writable]]: true, [[Enumerable]]: false,
   [[Configurable]]: true } unless otherwise specified.
 includes: [propertyHelper.js]
+features: [string-trimming]
 ---*/
 
-verifyNotEnumerable(String.prototype, "trimStart");
-verifyWritable(String.prototype, "trimStart");
-verifyConfigurable(String.prototype, "trimStart");
+verifyProperty(String.prototype, "trimStart", {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+});