diff --git a/test/annexB/B.2.1.js b/test/annexB/B.2.1.js
index 126f707e1b..2c0ee03262 100644
--- a/test/annexB/B.2.1.js
+++ b/test/annexB/B.2.1.js
@@ -7,18 +7,12 @@ description: >
     Object.getOwnPropertyDescriptor returns data desc for functions on
     built-ins (Global.escape)
 includes:
-    - runTestCase.js
     - fnGlobalObject.js
+    - propertyHelper.js
 ---*/
 
-function testcase() {
-  var global = fnGlobalObject();
-  var desc = Object.getOwnPropertyDescriptor(global, "escape");
-  if (desc.value === global.escape &&
-      desc.writable === true &&
-      desc.enumerable === false &&
-      desc.configurable === true) {
-    return true;
-  }
- }
-runTestCase(testcase);
+var global = fnGlobalObject();
+
+verifyWritable(global, "escape");
+verifyNotEnumerable(global, "escape");
+verifyConfigurable(global, "escape");
diff --git a/test/annexB/B.2.2.js b/test/annexB/B.2.2.js
index 114a7afec7..2b37c3a21d 100644
--- a/test/annexB/B.2.2.js
+++ b/test/annexB/B.2.2.js
@@ -7,18 +7,12 @@ description: >
     Object.getOwnPropertyDescriptor returns data desc for functions on
     built-ins (Global.unescape)
 includes:
-    - runTestCase.js
     - fnGlobalObject.js
+    - propertyHelper.js
 ---*/
 
-function testcase() {
-  var global = fnGlobalObject();
-  var desc = Object.getOwnPropertyDescriptor(global,  "unescape");
-  if (desc.value === global.unescape &&
-      desc.writable === true &&
-      desc.enumerable === false &&
-      desc.configurable === true) {
-    return true;
-  }
- }
-runTestCase(testcase);
+var global = fnGlobalObject();
+
+verifyWritable(global, "unescape");
+verifyNotEnumerable(global, "unescape");
+verifyConfigurable(global, "unescape");
diff --git a/test/annexB/B.2.3.js b/test/annexB/B.2.3.js
index 0c12967380..4f7bb57dad 100644
--- a/test/annexB/B.2.3.js
+++ b/test/annexB/B.2.3.js
@@ -6,16 +6,9 @@ es5id: B.2.3
 description: >
     Object.getOwnPropertyDescriptor returns data desc for functions on
     built-ins (String.prototype.substr)
-includes: [runTestCase.js]
+includes: [propertyHelper.js]
 ---*/
 
-function testcase() {
-  var desc = Object.getOwnPropertyDescriptor(String.prototype, "substr");
-  if (desc.value === String.prototype.substr &&
-      desc.writable === true &&
-      desc.enumerable === false &&
-      desc.configurable === true) {
-    return true;
-  }
- }
-runTestCase(testcase);
+verifyWritable(String.prototype, "substr");
+verifyNotEnumerable(String.prototype, "substr");
+verifyConfigurable(String.prototype, "substr");
diff --git a/test/annexB/B.2.4.js b/test/annexB/B.2.4.js
index 320105df98..27e1e0300d 100644
--- a/test/annexB/B.2.4.js
+++ b/test/annexB/B.2.4.js
@@ -6,16 +6,9 @@ es5id: B.2.4
 description: >
     Object.getOwnPropertyDescriptor returns data desc for functions on
     built-ins (Date.prototype.getYear)
-includes: [runTestCase.js]
+includes: [propertyHelper.js]
 ---*/
 
-function testcase() {
-  var desc = Object.getOwnPropertyDescriptor(Date.prototype, "getYear");
-  if (desc.value === Date.prototype.getYear &&
-      desc.writable === true &&
-      desc.enumerable === false &&
-      desc.configurable === true) {
-    return true;
-  }
- }
-runTestCase(testcase);
+verifyWritable(Date.prototype, "getYear");
+verifyNotEnumerable(Date.prototype, "getYear");
+verifyConfigurable(Date.prototype, "getYear");
diff --git a/test/annexB/B.2.5.js b/test/annexB/B.2.5.js
index 91fd5b5196..32e65dc938 100644
--- a/test/annexB/B.2.5.js
+++ b/test/annexB/B.2.5.js
@@ -6,16 +6,9 @@ es5id: B.2.5
 description: >
     Object.getOwnPropertyDescriptor returns data desc for functions on
     built-ins (Date.prototype.setYear)
-includes: [runTestCase.js]
+includes: [propertyHelper.js]
 ---*/
 
-function testcase() {
-  var desc = Object.getOwnPropertyDescriptor(Date.prototype, "setYear");
-  if (desc.value === Date.prototype.setYear &&
-      desc.writable === true &&
-      desc.enumerable === false &&
-      desc.configurable === true) {
-    return true;
-  }
- }
-runTestCase(testcase);
+verifyWritable(Date.prototype, "setYear");
+verifyNotEnumerable(Date.prototype, "setYear");
+verifyConfigurable(Date.prototype, "setYear");
diff --git a/test/annexB/B.2.6.js b/test/annexB/B.2.6.js
index 8ce49179ec..0a7236a93d 100644
--- a/test/annexB/B.2.6.js
+++ b/test/annexB/B.2.6.js
@@ -6,16 +6,10 @@ es5id: B.2.6
 description: >
     Object.getOwnPropertyDescriptor returns data desc for functions on
     built-ins (Date.prototype.toGMTString)
-includes: [runTestCase.js]
+includes: [propertyHelper.js]
+
 ---*/
 
-function testcase() {
-  var desc = Object.getOwnPropertyDescriptor(Date.prototype, "toGMTString");
-  if (desc.value === Date.prototype.toGMTString &&
-      desc.writable === true &&
-      desc.enumerable === false &&
-      desc.configurable === true) {
-    return true;
-  }
- }
-runTestCase(testcase);
+verifyWritable(Date.prototype, "toGMTString");
+verifyNotEnumerable(Date.prototype, "toGMTString");
+verifyConfigurable(Date.prototype, "toGMTString");
diff --git a/test/annexB/B.RegExp.prototype.compile.js b/test/annexB/B.RegExp.prototype.compile.js
index 31aef97429..e5617fbcb9 100644
--- a/test/annexB/B.RegExp.prototype.compile.js
+++ b/test/annexB/B.RegExp.prototype.compile.js
@@ -6,16 +6,9 @@ es6id: B.2.5.1
 description: >
     Object.getOwnPropertyDescriptor returns data desc for functions on
     built-ins (RegExp.prototype.compile)
-includes: [runTestCase.js]
+includes: [propertyHelper.js]
 ---*/
 
-function testcase() {
-  var desc = Object.getOwnPropertyDescriptor(RegExp.prototype, "compile");
-  if (desc.value === RegExp.prototype.compile &&
-      desc.writable === true &&
-      desc.enumerable === false &&
-      desc.configurable === true) {
-    return true;
-  }
- }
-runTestCase(testcase);
+verifyWritable(RegExp.prototype, "compile");
+verifyNotEnumerable(RegExp.prototype, "compile");
+verifyConfigurable(RegExp.prototype, "compile");