diff --git a/test/built-ins/Function/prototype/S15.3.4_A5.js b/test/built-ins/Function/prototype/S15.3.4_A5.js
index e691fb2f89..49886228fd 100644
--- a/test/built-ins/Function/prototype/S15.3.4_A5.js
+++ b/test/built-ins/Function/prototype/S15.3.4_A5.js
@@ -7,15 +7,8 @@ info: >
     [[Construct]] property
 es5id: 15.3.4_A5
 description: Checking if creating "new Function.prototype object" fails
-includes:
-    - $PRINT.js
 ---*/
 
-//CHECK#
-try {
-  var obj = new Function.prototype;
-  $ERROR('#1: The Function prototype object is itself a Function object without [[Construct]] property: '+e);
-} catch (e) {
-  $PRINT("#1.1: The Function prototype object is itself a Function object without [[Construct]] property "+e);
-
-}
+assert.throws(TypeError, function() {
+  new Function.prototype;
+});
diff --git a/test/built-ins/Function/prototype/toString/S15.3.4.2_A7.js b/test/built-ins/Function/prototype/toString/S15.3.4.2_A7.js
index c6d46fcae2..ef8ce26959 100644
--- a/test/built-ins/Function/prototype/toString/S15.3.4.2_A7.js
+++ b/test/built-ins/Function/prototype/toString/S15.3.4.2_A7.js
@@ -5,15 +5,10 @@
 info: Function.prototype.toString can't be used as constructor
 es5id: 15.3.4.2_A7
 description: Checking if creating "new Function.prototype.toString" fails
-includes:
-    - $PRINT.js
 ---*/
 
 var FACTORY = Function.prototype.toString;
 
-try {
-  var instance = new FACTORY;
-  $ERROR('#1: Function.prototype.toString can\'t be used as constructor');
-} catch (e) {
-  $PRINT(e);
-}
+assert.throws(TypeError, function() {
+  new FACTORY;
+});
diff --git a/test/built-ins/Object/prototype/S15.2.4_A3.js b/test/built-ins/Object/prototype/S15.2.4_A3.js
index 4f8f3bad8f..3afac8afb5 100644
--- a/test/built-ins/Object/prototype/S15.2.4_A3.js
+++ b/test/built-ins/Object/prototype/S15.2.4_A3.js
@@ -7,14 +7,8 @@ info: >
     method
 es5id: 15.2.4_A3
 description: Checking if calling Object prototype as a function fails
-includes:
-    - $PRINT.js
 ---*/
 
-//CHECK#1
-try {
+assert.throws(TypeError, function() {
   Object.prototype();
-  $ERROR('#1: Since Object prototype object is not function it has not [[call]] method');
-} catch (e) {
-  $PRINT(e);
-}
+});
diff --git a/test/built-ins/Object/prototype/S15.2.4_A4.js b/test/built-ins/Object/prototype/S15.2.4_A4.js
index 8cff6c8f43..3f575d5fa3 100644
--- a/test/built-ins/Object/prototype/S15.2.4_A4.js
+++ b/test/built-ins/Object/prototype/S15.2.4_A4.js
@@ -7,14 +7,8 @@ info: >
     [[create]] method
 es5id: 15.2.4_A4
 description: Checking if creating "new Object.prototype" fails
-includes:
-    - $PRINT.js
 ---*/
 
-//CHECK#1
-try {
-  var instance = new Object.prototype;
-  $ERROR('#1: Since Object prototype object is not function it has not [[create]] method');
-} catch (e) {
-  $PRINT(e);
-}
+assert.throws(TypeError, function() {
+  new Object.prototype;
+});
diff --git a/test/built-ins/Object/prototype/hasOwnProperty/S15.2.4.5_A7.js b/test/built-ins/Object/prototype/hasOwnProperty/S15.2.4.5_A7.js
index 228b00b07c..a6480454eb 100644
--- a/test/built-ins/Object/prototype/hasOwnProperty/S15.2.4.5_A7.js
+++ b/test/built-ins/Object/prototype/hasOwnProperty/S15.2.4.5_A7.js
@@ -11,10 +11,6 @@ includes:
 
 var FACTORY = Object.prototype.hasOwnProperty;
 
-try {
-  var instance = new FACTORY;
-  $ERROR('#1: Object.prototype.hasOwnProperty can\'t be used as a constructor');
-} catch (e) {
-  $PRINT(e);
-
-}
+assert.throws(TypeError, function() {
+  new FACTORY;
+});
diff --git a/test/built-ins/Object/prototype/isPrototypeOf/S15.2.4.6_A7.js b/test/built-ins/Object/prototype/isPrototypeOf/S15.2.4.6_A7.js
index 410f91bb64..5e9bf6d46f 100644
--- a/test/built-ins/Object/prototype/isPrototypeOf/S15.2.4.6_A7.js
+++ b/test/built-ins/Object/prototype/isPrototypeOf/S15.2.4.6_A7.js
@@ -5,16 +5,10 @@
 info: Object.prototype.isPrototypeOf can't be used as a constructor
 es5id: 15.2.4.6_A7
 description: Checking if creating new "Object.prototype.isPrototypeOf" fails
-includes:
-    - $PRINT.js
 ---*/
 
 var FACTORY = Object.prototype.isPrototypeOf;
 
-try {
-  var instance = new FACTORY;
-  $ERROR('#1: Object.prototype.isPrototypeOf can\'t be used as a constructor');
-} catch (e) {
-  $PRINT(e);
-
-}
+assert.throws(TypeError, function() {
+  new FACTORY;
+});
diff --git a/test/built-ins/Object/prototype/propertyIsEnumerable/S15.2.4.7_A7.js b/test/built-ins/Object/prototype/propertyIsEnumerable/S15.2.4.7_A7.js
index 34821898f3..98ac74a123 100644
--- a/test/built-ins/Object/prototype/propertyIsEnumerable/S15.2.4.7_A7.js
+++ b/test/built-ins/Object/prototype/propertyIsEnumerable/S15.2.4.7_A7.js
@@ -7,16 +7,10 @@ es5id: 15.2.4.7_A7
 description: >
     Checking if creating "new Object.prototype.propertyIsEnumerable"
     fails
-includes:
-    - $PRINT.js
 ---*/
 
 var FACTORY = Object.prototype.propertyIsEnumerable;
 
-try {
-  var instance = new FACTORY;
-  $ERROR('#1: Object.prototype.propertyIsEnumerable can\'t be used as a constructor');
-} catch (e) {
-  $PRINT(e);
-
-}
+assert.throws(TypeError, function() {
+  new FACTORY;
+});
diff --git a/test/built-ins/Object/prototype/toLocaleString/S15.2.4.3_A7.js b/test/built-ins/Object/prototype/toLocaleString/S15.2.4.3_A7.js
index 5567a3fb80..b186512351 100644
--- a/test/built-ins/Object/prototype/toLocaleString/S15.2.4.3_A7.js
+++ b/test/built-ins/Object/prototype/toLocaleString/S15.2.4.3_A7.js
@@ -5,16 +5,10 @@
 info: Object.prototype.toLocaleString can't be used as a constructor
 es5id: 15.2.4.3_A7
 description: Checking if creating "new Object.prototype.toLocaleString" fails
-includes:
-    - $PRINT.js
 ---*/
 
 var FACTORY = Object.prototype.toLocaleString;
 
-try {
-  var instance = new FACTORY;
-  $ERROR('#1: Object.prototype.toLocaleString can\'t be used as a constructor');
-} catch (e) {
-  $PRINT(e);
-
-}
+assert.throws(TypeError, function() {
+  new FACTORY;
+});
diff --git a/test/built-ins/Object/prototype/toString/S15.2.4.2_A7.js b/test/built-ins/Object/prototype/toString/S15.2.4.2_A7.js
index ea58f028ec..99e331d7d9 100644
--- a/test/built-ins/Object/prototype/toString/S15.2.4.2_A7.js
+++ b/test/built-ins/Object/prototype/toString/S15.2.4.2_A7.js
@@ -5,15 +5,10 @@
 info: Object.prototype.toString can't be used as a constructor
 es5id: 15.2.4.2_A7
 description: Checking if creating "new Object.prototype.toString" fails
-includes:
-    - $PRINT.js
 ---*/
 
 var FACTORY = Object.prototype.toString;
 
-try {
-  var instance = new FACTORY;
-  $ERROR('#1: Object.prototype.toString can\'t be used as a constructor');
-} catch (e) {
-  $PRINT(e);
-}
+assert.throws(TypeError, function() {
+  new FACTORY;
+});
diff --git a/test/built-ins/Object/prototype/valueOf/S15.2.4.4_A7.js b/test/built-ins/Object/prototype/valueOf/S15.2.4.4_A7.js
index 902fa142a8..44490329c7 100644
--- a/test/built-ins/Object/prototype/valueOf/S15.2.4.4_A7.js
+++ b/test/built-ins/Object/prototype/valueOf/S15.2.4.4_A7.js
@@ -11,10 +11,6 @@ includes:
 
 var FACTORY = Object.prototype.valueOf;
 
-try {
-  var instance = new FACTORY;
-  $ERROR('#1: Object.prototype.valueOf can\'t be used as a constructor');
-} catch (e) {
-  $PRINT(e);
-
-}
+assert.throws(TypeError, function() {
+  new FACTORY;
+});
diff --git a/test/built-ins/String/prototype/lastIndexOf/S15.5.4.8_A7.js b/test/built-ins/String/prototype/lastIndexOf/S15.5.4.8_A7.js
index a9e1972280..40a0c4941f 100644
--- a/test/built-ins/String/prototype/lastIndexOf/S15.5.4.8_A7.js
+++ b/test/built-ins/String/prototype/lastIndexOf/S15.5.4.8_A7.js
@@ -5,15 +5,10 @@
 info: String.prototype.lastIndexOf can't be used as constructor
 es5id: 15.5.4.8_A7
 description: Checking if creating the String.prototype.lastIndexOf object fails
-includes:
-    - $PRINT.js
 ---*/
 
-var __FACTORY = String.prototype.lastIndexOf;
+var FACTORY = String.prototype.lastIndexOf;
 
-try {
-  var __instance = new __FACTORY;
-  $ERROR('#1: __FACTORY = String.prototype.lastIndexOf; __instance = new __FACTORY lead to throwing exception');
-} catch (e) {
-  $PRINT(e);
-}
+assert.throws(TypeError, function() {
+  new FACTORY;
+});
diff --git a/test/built-ins/String/prototype/slice/S15.5.4.13_A7.js b/test/built-ins/String/prototype/slice/S15.5.4.13_A7.js
index 7246b6d8f0..deba84f20f 100644
--- a/test/built-ins/String/prototype/slice/S15.5.4.13_A7.js
+++ b/test/built-ins/String/prototype/slice/S15.5.4.13_A7.js
@@ -5,15 +5,10 @@
 info: String.prototype.slice can't be used as constructor
 es5id: 15.5.4.13_A7
 description: Checking if creating the String.prototype.slice object fails
-includes:
-    - $PRINT.js
 ---*/
 
-var __FACTORY = String.prototype.slice;
+var FACTORY = String.prototype.slice;
 
-try {
-  var __instance = new __FACTORY;
-  $ERROR('#1: __FACTORY = String.prototype.slice; "__instance = new __FACTORY" lead to throwing exception');
-} catch (e) {
-  $PRINT(e);
-}
+assert.throws(TypeError, function() {
+  new FACTORY;
+});
diff --git a/test/language/statements/block/S12.1_A2.js b/test/language/statements/block/S12.1_A2.js
index eda09af2c4..7b3cf0d396 100644
--- a/test/language/statements/block/S12.1_A2.js
+++ b/test/language/statements/block/S12.1_A2.js
@@ -13,12 +13,12 @@ includes: [$PRINT.js]
 
 //////////////////////////////////////////////////////////////////////////////
 //CHECK#1
-try {
-	x();
-	$ERROR('#1: "x()" lead to throwing exception');
-} catch (e) {
-	$PRINT(e.message);
-}
+assert.throws(ReferenceError, function() {
+	{
+		x();
+	}
+});
+
 //
 //////////////////////////////////////////////////////////////////////////////
 
diff --git a/test/language/statements/variable/S12.2_A1.js b/test/language/statements/variable/S12.2_A1.js
index 76bf477558..1a53da0664 100644
--- a/test/language/statements/variable/S12.2_A1.js
+++ b/test/language/statements/variable/S12.2_A1.js
@@ -8,7 +8,6 @@ info: >
     VariableStatement is executed, not when the variable is created
 es5id: 12.2_A1
 description: Creating variables after entering the execution scope
-includes: [$PRINT.js]
 ---*/
 
 //////////////////////////////////////////////////////////////////////////////
@@ -25,12 +24,9 @@ try {
 
 //////////////////////////////////////////////////////////////////////////////
 //CHECK#2
-try{
+assert.throws(ReferenceError, function() {
     __something__undefined = __something__undefined;
-    $ERROR('#2: "__something__undefined = __something__undefined" lead to throwing exception');
-} catch(e){
-    $PRINT(e.message);
-}
+});
 //
 //////////////////////////////////////////////////////////////////////////////
 
diff --git a/test/language/statements/variable/S12.2_A5.js b/test/language/statements/variable/S12.2_A5.js
index 877b9c7287..6a0de73113 100644
--- a/test/language/statements/variable/S12.2_A5.js
+++ b/test/language/statements/variable/S12.2_A5.js
@@ -7,18 +7,14 @@ info: >
     reaches the eval statement
 es5id: 12.2_A5
 description: Executing eval("var x")
-includes: [$PRINT.js]
 flags: [noStrict]
 ---*/
 
 //////////////////////////////////////////////////////////////////////////////
 //CHECK#1
-try{
+assert.throws(ReferenceError, function() {
 	x=x;
-	$ERROR('#1: "x=x" lead to throwing exception');
-}catch(e){
-	$PRINT(e.message);
-};
+});
 //
 //////////////////////////////////////////////////////////////////////////////