diff --git a/test/built-ins/Math/abs/S15.8.2.1_A3.js b/test/built-ins/Math/abs/S15.8.2.1_A3.js
index e726ceb8d7..59eebf6543 100644
--- a/test/built-ins/Math/abs/S15.8.2.1_A3.js
+++ b/test/built-ins/Math/abs/S15.8.2.1_A3.js
@@ -9,7 +9,4 @@ description: Checking if Math.abs(-Infinity) equals to +Infinity
 
 // CHECK#1
 var x = -Infinity;
-if (Math.abs(x) !== +Infinity)
-{
-  throw new Test262Error("#1: 'var x=-Infinity; Math.abs(x) !== +Infinity'");
-}
+assert.sameValue(Math.abs(x), +Infinity, 'Math.abs(-Infinity) must return +Infinity');
diff --git a/test/built-ins/Math/ceil/S15.8.2.6_A4.js b/test/built-ins/Math/ceil/S15.8.2.6_A4.js
index 697db99d0a..036ff0b936 100644
--- a/test/built-ins/Math/ceil/S15.8.2.6_A4.js
+++ b/test/built-ins/Math/ceil/S15.8.2.6_A4.js
@@ -9,7 +9,4 @@ description: Checking if Math.ceil(x) is +Infinity, where x is +Infinity
 
 // CHECK#1
 var x = +Infinity;
-if (Math.ceil(x) !== +Infinity)
-{
-  throw new Test262Error("#1: 'var x = +Infinity; Math.ceil(x) !== +Infinity'");
-}
+assert.sameValue(Math.ceil(x), +Infinity, 'Math.ceil(+Infinity) must return +Infinity');
diff --git a/test/built-ins/Math/ceil/S15.8.2.6_A5.js b/test/built-ins/Math/ceil/S15.8.2.6_A5.js
index 3e99ec0601..7e6f2a0d80 100644
--- a/test/built-ins/Math/ceil/S15.8.2.6_A5.js
+++ b/test/built-ins/Math/ceil/S15.8.2.6_A5.js
@@ -9,7 +9,4 @@ description: Checking if Math.ceil(x) is -Infinity, where x is -Infinity
 
 // CHECK#1
 var x = -Infinity;
-if (Math.ceil(x) !== -Infinity)
-{
-  throw new Test262Error("#1: 'var x = -Infinity; Math.ceil(x) !== -Infinity'");
-}
+assert.sameValue(Math.ceil(x), -Infinity, 'Math.ceil(-Infinity) must return -Infinity');
diff --git a/test/built-ins/Math/ceil/S15.8.2.6_A7.js b/test/built-ins/Math/ceil/S15.8.2.6_A7.js
index d8f7c7a348..efb5e265cb 100644
--- a/test/built-ins/Math/ceil/S15.8.2.6_A7.js
+++ b/test/built-ins/Math/ceil/S15.8.2.6_A7.js
@@ -13,8 +13,5 @@ description: >
 for (var i = -1000; i < 1000; i++)
 {
   var x = i / 10.0;
-  if (Math.ceil(x) !== -Math.floor(-x))
-  {
-    throw new Test262Error("#1: 'x = " + x + "; Math.ceil(x) !== -Math.floor(-x)'");
-  }
+  assert.sameValue(Math.ceil(x), -Math.floor(-x), 'Math.ceil(i / 10.0) must return -Math.floor(-x)');
 }
diff --git a/test/built-ins/Math/cos/S15.8.2.7_A2.js b/test/built-ins/Math/cos/S15.8.2.7_A2.js
index 01c9382d8f..9dbdeca4ac 100644
--- a/test/built-ins/Math/cos/S15.8.2.7_A2.js
+++ b/test/built-ins/Math/cos/S15.8.2.7_A2.js
@@ -9,7 +9,4 @@ description: Checking if Math.cos(+0) is 1
 
 // CHECK#1
 var x = +0;
-if (Math.cos(x) !== 1)
-{
-  throw new Test262Error("#1: 'var x = +0; Math.cos(x) !== 1'");
-}
+assert.sameValue(Math.cos(x), 1, 'Math.cos(+0) must return 1');
diff --git a/test/built-ins/Math/cos/S15.8.2.7_A3.js b/test/built-ins/Math/cos/S15.8.2.7_A3.js
index fda964e414..388b541dbb 100644
--- a/test/built-ins/Math/cos/S15.8.2.7_A3.js
+++ b/test/built-ins/Math/cos/S15.8.2.7_A3.js
@@ -9,7 +9,4 @@ description: Checking if Math.cos(-0) is 1
 
 // CHECK#1
 var x = -0;
-if (Math.cos(x) !== 1)
-{
-  throw new Test262Error("#1: 'var x = -0; Math.cos(x) !== 1'");
-}
+assert.sameValue(Math.cos(x), 1, 'Math.cos(-0) must return 1');
diff --git a/test/built-ins/Math/exp/S15.8.2.8_A2.js b/test/built-ins/Math/exp/S15.8.2.8_A2.js
index e029015d49..c560fddc97 100644
--- a/test/built-ins/Math/exp/S15.8.2.8_A2.js
+++ b/test/built-ins/Math/exp/S15.8.2.8_A2.js
@@ -9,7 +9,4 @@ description: Checking if Math.exp(+0) is 1
 
 // CHECK#1
 var x = +0;
-if (Math.exp(x) !== 1)
-{
-  throw new Test262Error("#1: 'var x = +0; Math.exp(x) !== 1'");
-}
+assert.sameValue(Math.exp(x), 1, 'Math.exp(+0) must return 1');
diff --git a/test/built-ins/Math/exp/S15.8.2.8_A3.js b/test/built-ins/Math/exp/S15.8.2.8_A3.js
index f321f12e32..dabd4236c0 100644
--- a/test/built-ins/Math/exp/S15.8.2.8_A3.js
+++ b/test/built-ins/Math/exp/S15.8.2.8_A3.js
@@ -9,7 +9,4 @@ description: Checking if Math.exp(-0) is 1
 
 // CHECK#1
 var x = -0;
-if (Math.exp(x) !== 1)
-{
-  throw new Test262Error("#1: 'var x = -0; Math.exp(x) !== 1'");
-}
+assert.sameValue(Math.exp(x), 1, 'Math.exp(-0) must return 1');
diff --git a/test/built-ins/Math/exp/S15.8.2.8_A4.js b/test/built-ins/Math/exp/S15.8.2.8_A4.js
index dc11e752bc..5894a19589 100644
--- a/test/built-ins/Math/exp/S15.8.2.8_A4.js
+++ b/test/built-ins/Math/exp/S15.8.2.8_A4.js
@@ -9,7 +9,4 @@ description: Checking if Math.exp(+Infinity) is +Ifinity
 
 // CHECK#1
 var x = +Infinity;
-if (Math.exp(x) !== +Infinity)
-{
-  throw new Test262Error("#1: 'var x = +Infinity; Math.exp(x) !== +Infinity'");
-}
+assert.sameValue(Math.exp(x), +Infinity, 'Math.exp(+Infinity) must return +Infinity');
diff --git a/test/built-ins/Math/floor/S15.8.2.9_A4.js b/test/built-ins/Math/floor/S15.8.2.9_A4.js
index 7fb6639207..50a8c211bc 100644
--- a/test/built-ins/Math/floor/S15.8.2.9_A4.js
+++ b/test/built-ins/Math/floor/S15.8.2.9_A4.js
@@ -9,7 +9,4 @@ description: Checking if Math.floor(x) is +Infinity, where x is +Infinity
 
 // CHECK#1
 var x = +Infinity;
-if (Math.floor(x) !== +Infinity)
-{
-  throw new Test262Error("#1: 'var x = +Infinity; Math.floor(x) !== +Infinity'");
-}
+assert.sameValue(Math.floor(x), +Infinity, 'Math.floor(+Infinity) must return +Infinity');
diff --git a/test/built-ins/Math/floor/S15.8.2.9_A5.js b/test/built-ins/Math/floor/S15.8.2.9_A5.js
index 1aaa8725f8..6451fdc039 100644
--- a/test/built-ins/Math/floor/S15.8.2.9_A5.js
+++ b/test/built-ins/Math/floor/S15.8.2.9_A5.js
@@ -9,7 +9,4 @@ description: Checking if Math.floor(x) is -Infinity, where x is -Infinity
 
 // CHECK#1
 var x = -Infinity;
-if (Math.floor(x) !== -Infinity)
-{
-  throw new Test262Error("#1: 'var x = -Infinity; Math.floor(x) !== -Infinity'");
-}
+assert.sameValue(Math.floor(x), -Infinity, 'Math.floor(-Infinity) must return -Infinity');
diff --git a/test/built-ins/Math/floor/S15.8.2.9_A7.js b/test/built-ins/Math/floor/S15.8.2.9_A7.js
index e1d6a30a36..dae8e5a7b6 100644
--- a/test/built-ins/Math/floor/S15.8.2.9_A7.js
+++ b/test/built-ins/Math/floor/S15.8.2.9_A7.js
@@ -13,8 +13,10 @@ description: >
 for (var i = -1000; i < 1000; i++)
 {
   var x = i / 10.0;
-  if (-Math.ceil(-x) !== Math.floor(x))
-  {
-    throw new Test262Error("#1: 'x = " + x + "; Math.floor(x) !== -Math.ceil(-x)'");
-  }
+
+  assert.sameValue(
+    -Math.ceil(-x),
+    Math.floor(x),
+    'The value of `-Math.ceil(-x)` must return the same value returned by Math.floor(x)'
+  );
 }
diff --git a/test/built-ins/Math/log/S15.8.2.10_A3.js b/test/built-ins/Math/log/S15.8.2.10_A3.js
index acd08dd61a..5151cc8783 100644
--- a/test/built-ins/Math/log/S15.8.2.10_A3.js
+++ b/test/built-ins/Math/log/S15.8.2.10_A3.js
@@ -9,14 +9,8 @@ description: Checking if Math.log(+0) and Math.log(-0) equals to -Infinity
 
 // CHECK#1
 var x = +0;
-if (Math.log(x) !== -Infinity)
-{
-  throw new Test262Error("#1: 'var x=+0; Math.log(x) !== -Infinity'");
-}
+assert.sameValue(Math.log(x), -Infinity, 'Math.log(+0) must return -Infinity');
 
 // CHECK#2
 var x = -0;
-if (Math.log(x) !== -Infinity)
-{
-  throw new Test262Error("#1: 'var x=-0; Math.log(x) !== -Infinity'");
-}
+assert.sameValue(Math.log(x), -Infinity, 'Math.log(-0) must return -Infinity');
diff --git a/test/built-ins/Math/log/S15.8.2.10_A5.js b/test/built-ins/Math/log/S15.8.2.10_A5.js
index db6debc73c..f8b5b00b41 100644
--- a/test/built-ins/Math/log/S15.8.2.10_A5.js
+++ b/test/built-ins/Math/log/S15.8.2.10_A5.js
@@ -9,7 +9,4 @@ description: Checking if Math.log(+Infinity) equals to +Infinity
 
 // CHECK#1
 var x = +Infinity;
-if (Math.log(x) !== +Infinity)
-{
-  throw new Test262Error("#1: 'var x=+Infinity; Math.log(x) !== +Infinity'");
-}
+assert.sameValue(Math.log(x), +Infinity, 'Math.log(+Infinity) must return +Infinity');
diff --git a/test/built-ins/Math/max/S15.8.2.11_A1.js b/test/built-ins/Math/max/S15.8.2.11_A1.js
index daa6ed6421..b34c8a5e16 100644
--- a/test/built-ins/Math/max/S15.8.2.11_A1.js
+++ b/test/built-ins/Math/max/S15.8.2.11_A1.js
@@ -6,9 +6,4 @@ info: If no arguments are given, Math.max() is -Infinity
 es5id: 15.8.2.11_A1
 description: Checking if Math.max() equals to -Infinity
 ---*/
-
-// CHECK#1
-if (Math.max() != -Infinity)
-{
-  throw new Test262Error("#1: 'Math.max() != -Infinity'");
-}
+assert.sameValue(Math.max(), -Infinity, 'Math.max() must return -Infinity');
diff --git a/test/built-ins/Math/max/S15.8.2.11_A4.js b/test/built-ins/Math/max/S15.8.2.11_A4.js
index a777283f6f..6f393c97b3 100644
--- a/test/built-ins/Math/max/S15.8.2.11_A4.js
+++ b/test/built-ins/Math/max/S15.8.2.11_A4.js
@@ -6,18 +6,6 @@ info: The length property of the Math.max method is 2
 es5id: 15.8.2.11_A4
 description: Checking if Math.max.length property is defined and equals to 2
 ---*/
-
-// CHECK#1
-if (typeof Math.max !== "function") {
-  throw new Test262Error('#1: Math.max method is not defined');
-}
-
-// CHECK#2
-if (typeof Math.max.length === "undefined") {
-  throw new Test262Error('#2: length property of Math.max method is undefined');
-}
-
-// CHECK#3
-if (Math.max.length !== 2) {
-  throw new Test262Error('#3: The length property of the Math.max method is not 2');
-}
+assert.sameValue(typeof Math.max, "function", 'The value of `typeof Math.max` is expected to be "function"');
+assert.notSameValue(typeof Math.max.length, "undefined", 'The value of typeof Math.max.length is not "undefined"');
+assert.sameValue(Math.max.length, 2, 'The value of Math.max.length is expected to be 2');
diff --git a/test/built-ins/Math/min/S15.8.2.12_A1.js b/test/built-ins/Math/min/S15.8.2.12_A1.js
index 2551934700..41e4fb2cf3 100644
--- a/test/built-ins/Math/min/S15.8.2.12_A1.js
+++ b/test/built-ins/Math/min/S15.8.2.12_A1.js
@@ -6,9 +6,4 @@ info: If no arguments are given, Math.min() is +Infinity
 es5id: 15.8.2.12_A1
 description: Checking if Math.min() equals to +Infinity
 ---*/
-
-// CHECK#1
-if (Math.min() != +Infinity)
-{
-  throw new Test262Error("#1: 'Math.min() != +Infinity'");
-}
+assert.sameValue(Math.min(), +Infinity, 'Math.min() must return +Infinity');
diff --git a/test/built-ins/Math/min/S15.8.2.12_A4.js b/test/built-ins/Math/min/S15.8.2.12_A4.js
index 8d8ee272ee..7807a30c70 100644
--- a/test/built-ins/Math/min/S15.8.2.12_A4.js
+++ b/test/built-ins/Math/min/S15.8.2.12_A4.js
@@ -6,18 +6,6 @@ info: The length property of the Math.min method is 2
 es5id: 15.8.2.12_A4
 description: Checking if Math.min.length property is defined and equals to 2
 ---*/
-
-// CHECK#1
-if (typeof Math.min !== "function") {
-  throw new Test262Error('#1: Math.min method is not defined');
-}
-
-// CHECK#2
-if (typeof Math.min.length === "undefined") {
-  throw new Test262Error('#2: length property of Math.min method is undefined');
-}
-
-// CHECK#3
-if (Math.min.length !== 2) {
-  throw new Test262Error('#3: The length property of the Math.min method is not 2');
-}
+assert.sameValue(typeof Math.min, "function", 'The value of `typeof Math.min` is expected to be "function"');
+assert.notSameValue(typeof Math.min.length, "undefined", 'The value of typeof Math.min.length is not "undefined"');
+assert.sameValue(Math.min.length, 2, 'The value of Math.min.length is expected to be 2');
diff --git a/test/built-ins/Math/round/S15.8.2.15_A4.js b/test/built-ins/Math/round/S15.8.2.15_A4.js
index 5cea0f4424..a1544e737b 100644
--- a/test/built-ins/Math/round/S15.8.2.15_A4.js
+++ b/test/built-ins/Math/round/S15.8.2.15_A4.js
@@ -9,7 +9,4 @@ description: Checking if Math.round(x) is +Infinity, where x is +Infinity
 
 // CHECK#1
 var x = +Infinity;
-if (Math.round(x) !== +Infinity)
-{
-  throw new Test262Error("#1: 'var x=+Infinity; Math.round(x) !== +Infinity'");
-}
+assert.sameValue(Math.round(x), +Infinity, 'Math.round(+Infinity) must return +Infinity');
diff --git a/test/built-ins/Math/round/S15.8.2.15_A5.js b/test/built-ins/Math/round/S15.8.2.15_A5.js
index 7b5577db4f..58009ee8f7 100644
--- a/test/built-ins/Math/round/S15.8.2.15_A5.js
+++ b/test/built-ins/Math/round/S15.8.2.15_A5.js
@@ -9,7 +9,4 @@ description: Checking if Math.round(x) is -Infinity, where x is -Infinity
 
 // CHECK#1
 var x = -Infinity;
-if (Math.round(x) !== -Infinity)
-{
-  throw new Test262Error("#1: 'var x=-Infinity; Math.round(x) !== -Infinity'");
-}
+assert.sameValue(Math.round(x), -Infinity, 'Math.round(-Infinity) must return -Infinity');
diff --git a/test/built-ins/Math/round/S15.8.2.15_A6.js b/test/built-ins/Math/round/S15.8.2.15_A6.js
index bde1582d4e..5a3bd6a3af 100644
--- a/test/built-ins/Math/round/S15.8.2.15_A6.js
+++ b/test/built-ins/Math/round/S15.8.2.15_A6.js
@@ -16,10 +16,12 @@ description: >
 for (var i = 0; i <= 1000; i++)
 {
   var x = i / 10.0;
-  if (Math.round(x) !== Math.floor(x + 0.5))
-  {
-    throw new Test262Error("#1: 'x = " + x + "; Math.round(x) !== Math.floor(x + 0.5)'")
-  }
+
+  assert.sameValue(
+    Math.round(x),
+    Math.floor(x + 0.5),
+    'Math.round(i / 10.0) must return the same value returned by Math.floor(x + 0.5)'
+  );
 }
 
 for (i = -5; i >= -1000; i--)
@@ -32,8 +34,9 @@ for (i = -5; i >= -1000; i--)
     x = i / 10.0;
   }
 
-  if (Math.round(x) !== Math.floor(x + 0.5))
-  {
-    throw new Test262Error("#2: 'x = " + x + "; Math.round(x) !== Math.floor(x + 0.5)'")
-  }
+  assert.sameValue(
+    Math.round(x),
+    Math.floor(x + 0.5),
+    'Math.round(i / 10.0) must return the same value returned by Math.floor(x + 0.5)'
+  );
 }
diff --git a/test/built-ins/Math/round/S15.8.2.15_A7.js b/test/built-ins/Math/round/S15.8.2.15_A7.js
index 6530f0c85f..c96adb89fb 100644
--- a/test/built-ins/Math/round/S15.8.2.15_A7.js
+++ b/test/built-ins/Math/round/S15.8.2.15_A7.js
@@ -13,62 +13,46 @@ description: >
     2) for 0.5 - Number.EPSILON / 4
     3) for odd integers in [-(2 / Number.EPSILON - 1); -(1 / Number.EPSILON + 1)] or in [1 / Number.EPSILON + 1; 2 / Number.EPSILON - 1]
 ---*/
+assert.sameValue(
+  1 / Math.round(-0.5),
+  1 / -0,
+  'The result of evaluating (1 / Math.round(-0.5)) is expected to be 1 / -0'
+);
 
-// CHECK#1
-if (1 / Math.round(-0.5) !== 1 / -0) {
-  throw new Test262Error("#1: '1 / Math.round(-0.5) !== 1 / -0'");
-}
+assert.sameValue(
+  1 / Math.round(-0.25),
+  1 / -0,
+  'The result of evaluating (1 / Math.round(-0.25)) is expected to be 1 / -0'
+);
 
-// CHECK#2
-if (1 / Math.round(-0.25) !== 1 / -0) {
-  throw new Test262Error("#2: '1 / Math.round(-0.25) !== 1 / -0'");
-}
-
-// CHECK#3
-if (1 / Math.round(-0) !== 1 / -0) {
-  throw new Test262Error("#3: '1 / Math.round(-0) !== 1 / -0'");
-}
+assert.sameValue(1 / Math.round(-0), 1 / -0, 'The result of evaluating (1 / Math.round(-0)) is expected to be 1 / -0');
 
 var x = 0;
 
 // CHECK#4
 x = 0.5 - Number.EPSILON / 4;
-if (1 / Math.round(x) !== 1 / 0) {
-  throw new Test262Error("#4: '1 / Math.round(" + x + ") !== 1 / 0'");
-}
+assert.sameValue(1 / Math.round(x), 1 / 0, 'The result of evaluating (1 / Math.round(x)) is expected to be 1 / 0');
 
 // CHECK#5
 x = -(2 / Number.EPSILON - 1);
-if (Math.round(x) !== x) {
-  throw new Test262Error("#5: 'Math.round(" + x + ") !== " + x + "'");
-}
+assert.sameValue(Math.round(x), x, 'Math.round(-(2 / Number.EPSILON - 1)) returns x');
 
 // CHECK#6
 x = -(1.5 / Number.EPSILON - 1);
-if (Math.round(x) !== x) {
-  throw new Test262Error("#6: 'Math.round(" + x + ") !== " + x + "'");
-}
+assert.sameValue(Math.round(x), x, 'Math.round(-(1.5 / Number.EPSILON - 1)) returns x');
 
 // CHECK#7
 x = -(1 / Number.EPSILON + 1);
-if (Math.round(x) !== x) {
-  throw new Test262Error("#7: 'Math.round(" + x + ") !== " + x + "'");
-}
+assert.sameValue(Math.round(x), x, 'Math.round(-(1 / Number.EPSILON + 1)) returns x');
 
 // CHECK#8
 x = 1 / Number.EPSILON + 1;
-if (Math.round(x) !== x) {
-  throw new Test262Error("#8: 'Math.round(" + x + ") !== " + x + "'");
-}
+assert.sameValue(Math.round(x), x, 'Math.round(1 / Number.EPSILON + 1) returns x');
 
 // CHECK#9
 x = 1.5 / Number.EPSILON - 1;
-if (Math.round(x) !== x) {
-  throw new Test262Error("#9: 'Math.round(" + x + ") !== " + x + "'");
-}
+assert.sameValue(Math.round(x), x, 'Math.round(1.5 / Number.EPSILON - 1) returns x');
 
 // CHECK#10
 x = 2 / Number.EPSILON - 1;
-if (Math.round(x) !== x) {
-  throw new Test262Error("#10: 'Math.round(" + x + ") !== " + x + "'");
-}
+assert.sameValue(Math.round(x), x, 'Math.round(2 / Number.EPSILON - 1) returns x');
diff --git a/test/built-ins/Math/sqrt/S15.8.2.17_A5.js b/test/built-ins/Math/sqrt/S15.8.2.17_A5.js
index 6da33bd395..7c224ee30e 100644
--- a/test/built-ins/Math/sqrt/S15.8.2.17_A5.js
+++ b/test/built-ins/Math/sqrt/S15.8.2.17_A5.js
@@ -9,7 +9,4 @@ description: Checking if Math.sqrt(+Infinity) is +Infinity
 
 // CHECK#1
 var x = +Infinity;
-if (Math.sqrt(x) !== +Infinity)
-{
-  throw new Test262Error("#1: 'var x=+Infinity; Math.sqrt(x) !== +Infinity'");
-}
+assert.sameValue(Math.sqrt(x), +Infinity, 'Math.sqrt(+Infinity) must return +Infinity');