diff --git a/src/subclass-builtins/Date.case b/src/subclass-builtins/Date.case
index 65ae759f1f..b5d680d6cf 100644
--- a/src/subclass-builtins/Date.case
+++ b/src/subclass-builtins/Date.case
@@ -4,9 +4,11 @@
 /*---
 esid: sec-ecmascript-standard-built-in-objects
 desc: >
-  new SubDate() instanceof Date
+  new SubDate(0) instanceof Date
 template: default
 ---*/
 
 //- builtin
 Date
+//- args
+0
diff --git a/test/annexB/built-ins/Date/prototype/setYear/year-nan.js b/test/annexB/built-ins/Date/prototype/setYear/year-nan.js
index 23cf552504..1ef2860dd2 100644
--- a/test/annexB/built-ins/Date/prototype/setYear/year-nan.js
+++ b/test/annexB/built-ins/Date/prototype/setYear/year-nan.js
@@ -15,19 +15,19 @@ features: [Symbol]
 
 var date;
 
-date = new Date();
+date = new Date(0);
 assert.sameValue(date.setYear(), NaN, 'return value (no argument)');
 assert.sameValue(
   date.valueOf(), NaN, '[[DateValue]] internal slot (no argument)'
 );
 
-date = new Date();
+date = new Date(0);
 assert.sameValue(date.setYear(NaN), NaN, 'return value (literal NaN)');
 assert.sameValue(
   date.valueOf(), NaN, '[[DateValue]] internal slot (literal NaN)'
 );
 
-date = new Date();
+date = new Date(0);
 assert.sameValue(
   date.setYear('not a number'), NaN, 'return value (NaN from ToNumber)'
 );
diff --git a/test/annexB/built-ins/Date/prototype/setYear/year-to-number-err.js b/test/annexB/built-ins/Date/prototype/setYear/year-to-number-err.js
index 6c834d7c37..021f25fd45 100644
--- a/test/annexB/built-ins/Date/prototype/setYear/year-to-number-err.js
+++ b/test/annexB/built-ins/Date/prototype/setYear/year-to-number-err.js
@@ -12,7 +12,7 @@ info: |
 features: [Symbol]
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var symbol = Symbol('');
 var year = {
   valueOf: function() {
diff --git a/test/built-ins/Array/isArray/15.4.3.2-1-9.js b/test/built-ins/Array/isArray/15.4.3.2-1-9.js
index 5d4eab1d01..d48b3bcc9a 100644
--- a/test/built-ins/Array/isArray/15.4.3.2-1-9.js
+++ b/test/built-ins/Array/isArray/15.4.3.2-1-9.js
@@ -7,4 +7,4 @@ es5id: 15.4.3.2-1-9
 description: Array.isArray applied to Date object
 ---*/
 
-assert.sameValue(Array.isArray(new Date()), false, 'Array.isArray(new Date()) must return false');
+assert.sameValue(Array.isArray(new Date(0)), false, 'Array.isArray(new Date(0)) must return false');
diff --git a/test/built-ins/Array/prototype/every/15.4.4.16-1-11.js b/test/built-ins/Array/prototype/every/15.4.4.16-1-11.js
index c851023a80..e9eb2d613c 100644
--- a/test/built-ins/Array/prototype/every/15.4.4.16-1-11.js
+++ b/test/built-ins/Array/prototype/every/15.4.4.16-1-11.js
@@ -10,7 +10,7 @@ function callbackfn(val, idx, obj) {
   return !(obj instanceof Date);
 }
 
-var obj = new Date();
+var obj = new Date(0);
 obj.length = 1;
 obj[0] = 1;
 
diff --git a/test/built-ins/Array/prototype/every/15.4.4.16-3-23.js b/test/built-ins/Array/prototype/every/15.4.4.16-3-23.js
index 0dfdb6396b..6a064d73f2 100644
--- a/test/built-ins/Array/prototype/every/15.4.4.16-3-23.js
+++ b/test/built-ins/Array/prototype/every/15.4.4.16-3-23.js
@@ -31,10 +31,12 @@ Con.prototype = proto;
 
 var child = new Con();
 
-child.toString = function() {
-  toStringAccessed = true;
-  return '1';
-};
+Object.defineProperty(child, "toString", {
+  value: function() {
+	  toStringAccessed = true;
+	  return '1';
+  }
+});
 
 var obj = {
   0: 12,
diff --git a/test/built-ins/Array/prototype/every/15.4.4.16-5-15.js b/test/built-ins/Array/prototype/every/15.4.4.16-5-15.js
index 7133cd487a..a8b425922c 100644
--- a/test/built-ins/Array/prototype/every/15.4.4.16-5-15.js
+++ b/test/built-ins/Array/prototype/every/15.4.4.16-5-15.js
@@ -8,7 +8,7 @@ description: Array.prototype.every - Date Object can be used as thisArg
 ---*/
 
 var accessed = false;
-var objDate = new Date();
+var objDate = new Date(0);
 
 function callbackfn(val, idx, obj) {
   accessed = true;
diff --git a/test/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-21.js b/test/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-21.js
index c527cf763e..cb048d144c 100644
--- a/test/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-21.js
+++ b/test/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-21.js
@@ -10,7 +10,7 @@ var accessed = false;
 
 function callbackfn(val, idx, obj) {
   accessed = true;
-  return new Date();
+  return new Date(0);
 }
 
 assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
diff --git a/test/built-ins/Array/prototype/filter/15.4.4.20-1-11.js b/test/built-ins/Array/prototype/filter/15.4.4.20-1-11.js
index 438185e0c1..d2194bd3b7 100644
--- a/test/built-ins/Array/prototype/filter/15.4.4.20-1-11.js
+++ b/test/built-ins/Array/prototype/filter/15.4.4.20-1-11.js
@@ -10,7 +10,7 @@ function callbackfn(val, idx, obj) {
   return obj instanceof Date;
 }
 
-var obj = new Date();
+var obj = new Date(0);
 obj.length = 1;
 obj[0] = 1;
 
diff --git a/test/built-ins/Array/prototype/filter/15.4.4.20-5-15.js b/test/built-ins/Array/prototype/filter/15.4.4.20-5-15.js
index 2193c40150..ebef0f0546 100644
--- a/test/built-ins/Array/prototype/filter/15.4.4.20-5-15.js
+++ b/test/built-ins/Array/prototype/filter/15.4.4.20-5-15.js
@@ -8,7 +8,7 @@ description: Array.prototype.filter - Date Object can be used as thisArg
 
 var accessed = false;
 
-var objDate = new Date();
+var objDate = new Date(0);
 
 function callbackfn(val, idx, obj) {
   accessed = true;
diff --git a/test/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-22.js b/test/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-22.js
index d631b66c8b..904e43cc25 100644
--- a/test/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-22.js
+++ b/test/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-22.js
@@ -9,7 +9,7 @@ description: >
 ---*/
 
 function callbackfn(val, idx, obj) {
-  return new Date();
+  return new Date(0);
 }
 
 var newArr = [11].filter(callbackfn);
diff --git a/test/built-ins/Array/prototype/forEach/15.4.4.18-1-11.js b/test/built-ins/Array/prototype/forEach/15.4.4.18-1-11.js
index 4eaf2170a9..f71db3c903 100644
--- a/test/built-ins/Array/prototype/forEach/15.4.4.18-1-11.js
+++ b/test/built-ins/Array/prototype/forEach/15.4.4.18-1-11.js
@@ -12,7 +12,7 @@ function callbackfn(val, idx, obj) {
   result = obj instanceof Date;
 }
 
-var obj = new Date();
+var obj = new Date(0);
 obj.length = 1;
 obj[0] = 1;
 
diff --git a/test/built-ins/Array/prototype/forEach/15.4.4.18-5-15.js b/test/built-ins/Array/prototype/forEach/15.4.4.18-5-15.js
index 0200d8f56d..becc04ab21 100644
--- a/test/built-ins/Array/prototype/forEach/15.4.4.18-5-15.js
+++ b/test/built-ins/Array/prototype/forEach/15.4.4.18-5-15.js
@@ -7,7 +7,7 @@ description: Array.prototype.forEach - Date Object can be used as thisArg
 ---*/
 
 var result = false;
-var objDate = new Date();
+var objDate = new Date(0);
 
 function callbackfn(val, idx, obj) {
   result = (this === objDate);
diff --git a/test/built-ins/Array/prototype/indexOf/15.4.4.14-1-11.js b/test/built-ins/Array/prototype/indexOf/15.4.4.14-1-11.js
index e6ffc20f9f..3471e254e0 100644
--- a/test/built-ins/Array/prototype/indexOf/15.4.4.14-1-11.js
+++ b/test/built-ins/Array/prototype/indexOf/15.4.4.14-1-11.js
@@ -6,7 +6,7 @@ esid: sec-array.prototype.indexof
 description: Array.prototype.indexOf applied to Date object
 ---*/
 
-var obj = new Date();
+var obj = new Date(0);
 obj.length = 2;
 obj[1] = true;
 
diff --git a/test/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-11.js b/test/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-11.js
index 063c4a8830..12d97cf849 100644
--- a/test/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-11.js
+++ b/test/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-11.js
@@ -6,7 +6,7 @@ esid: sec-array.prototype.lastindexof
 description: Array.prototype.lastIndexOf applied to Date object
 ---*/
 
-var obj = new Date();
+var obj = new Date(0);
 obj.length = 2;
 obj[1] = true;
 
diff --git a/test/built-ins/Array/prototype/map/15.4.4.19-1-11.js b/test/built-ins/Array/prototype/map/15.4.4.19-1-11.js
index 003521b822..259b2a1359 100644
--- a/test/built-ins/Array/prototype/map/15.4.4.19-1-11.js
+++ b/test/built-ins/Array/prototype/map/15.4.4.19-1-11.js
@@ -10,7 +10,7 @@ function callbackfn(val, idx, obj) {
   return obj instanceof Date;
 }
 
-var obj = new Date();
+var obj = new Date(0);
 obj.length = 1;
 obj[0] = 1;
 
diff --git a/test/built-ins/Array/prototype/map/15.4.4.19-5-15.js b/test/built-ins/Array/prototype/map/15.4.4.19-5-15.js
index 5fef396b09..a771eda870 100644
--- a/test/built-ins/Array/prototype/map/15.4.4.19-5-15.js
+++ b/test/built-ins/Array/prototype/map/15.4.4.19-5-15.js
@@ -6,7 +6,7 @@ esid: sec-array.prototype.map
 description: Array.prototype.map - Date object can be used as thisArg
 ---*/
 
-var objDate = new Date();
+var objDate = new Date(0);
 
 function callbackfn(val, idx, obj) {
   return this === objDate;
diff --git a/test/built-ins/Array/prototype/reduce/15.4.4.21-1-11.js b/test/built-ins/Array/prototype/reduce/15.4.4.21-1-11.js
index f9bd16f175..55c7e6bd21 100644
--- a/test/built-ins/Array/prototype/reduce/15.4.4.21-1-11.js
+++ b/test/built-ins/Array/prototype/reduce/15.4.4.21-1-11.js
@@ -10,7 +10,7 @@ function callbackfn(prevVal, curVal, idx, obj) {
   return obj instanceof Date;
 }
 
-var obj = new Date();
+var obj = new Date(0);
 obj.length = 1;
 obj[0] = 1;
 
diff --git a/test/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-31.js b/test/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-31.js
index f8759271ea..454caf5267 100644
--- a/test/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-31.js
+++ b/test/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-31.js
@@ -6,7 +6,7 @@ esid: sec-array.prototype.reduce
 description: Array.prototype.reduce - Date object can be used as accumulator
 ---*/
 
-var objDate = new Date();
+var objDate = new Date(0);
 
 var accessed = false;
 
diff --git a/test/built-ins/Array/prototype/reduceRight/15.4.4.22-1-11.js b/test/built-ins/Array/prototype/reduceRight/15.4.4.22-1-11.js
index a2fe26d5e5..b9c1d3b6a3 100644
--- a/test/built-ins/Array/prototype/reduceRight/15.4.4.22-1-11.js
+++ b/test/built-ins/Array/prototype/reduceRight/15.4.4.22-1-11.js
@@ -6,7 +6,7 @@ esid: sec-array.prototype.reduceright
 description: Array.prototype.reduceRight applied to Date object
 ---*/
 
-var obj = new Date();
+var obj = new Date(0);
 obj.length = 1;
 obj[0] = 1;
 var accessed = false;
diff --git a/test/built-ins/Array/prototype/reduceRight/15.4.4.22-3-23.js b/test/built-ins/Array/prototype/reduceRight/15.4.4.22-3-23.js
index 49bf54c30a..71af713dae 100644
--- a/test/built-ins/Array/prototype/reduceRight/15.4.4.22-3-23.js
+++ b/test/built-ins/Array/prototype/reduceRight/15.4.4.22-3-23.js
@@ -35,10 +35,12 @@ function callbackfn(prevVal, curVal, idx, obj) {
   return false;
 }
 
-child.toString = function() {
-  toStringAccessed = true;
-  return '1';
-};
+Object.defineProperty(child, "toString", {
+  value: function() {
+	  toStringAccessed = true;
+	  return '1';
+  }
+});
 
 var obj = {
   0: 12,
diff --git a/test/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-31.js b/test/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-31.js
index 249a8ceb8d..e2dc04e2f5 100644
--- a/test/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-31.js
+++ b/test/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-31.js
@@ -9,7 +9,7 @@ description: >
 ---*/
 
 var accessed = false;
-var objDate = new Date();
+var objDate = new Date(0);
 
 function callbackfn(prevVal, curVal, idx, obj) {
   accessed = true;
diff --git a/test/built-ins/Array/prototype/some/15.4.4.17-1-11.js b/test/built-ins/Array/prototype/some/15.4.4.17-1-11.js
index b8bf81857f..706123bb11 100644
--- a/test/built-ins/Array/prototype/some/15.4.4.17-1-11.js
+++ b/test/built-ins/Array/prototype/some/15.4.4.17-1-11.js
@@ -10,7 +10,7 @@ function callbackfn(val, idx, obj) {
   return obj instanceof Date;
 }
 
-var obj = new Date();
+var obj = new Date(0);
 obj.length = 2;
 obj[0] = 11;
 obj[1] = 9;
diff --git a/test/built-ins/Array/prototype/some/15.4.4.17-5-15.js b/test/built-ins/Array/prototype/some/15.4.4.17-5-15.js
index ab527b7bae..f61b1e956a 100644
--- a/test/built-ins/Array/prototype/some/15.4.4.17-5-15.js
+++ b/test/built-ins/Array/prototype/some/15.4.4.17-5-15.js
@@ -6,7 +6,7 @@ esid: sec-array.prototype.some
 description: Array.prototype.some - Date object can be used as thisArg
 ---*/
 
-var objDate = new Date();
+var objDate = new Date(0);
 
 function callbackfn(val, idx, obj) {
   return this === objDate;
diff --git a/test/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-21.js b/test/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-21.js
index 04dd1dce95..2a5f3c1272 100644
--- a/test/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-21.js
+++ b/test/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-21.js
@@ -7,7 +7,7 @@ description: Array.prototype.some - return value of callbackfn is a Date object
 ---*/
 
 function callbackfn(val, idx, obj) {
-  return new Date();
+  return new Date(0);
 }
 
 assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
diff --git a/test/built-ins/Boolean/prototype/toString/S15.6.4.2_A2_T3.js b/test/built-ins/Boolean/prototype/toString/S15.6.4.2_A2_T3.js
index 95a7a35418..76c30a272a 100644
--- a/test/built-ins/Boolean/prototype/toString/S15.6.4.2_A2_T3.js
+++ b/test/built-ins/Boolean/prototype/toString/S15.6.4.2_A2_T3.js
@@ -11,14 +11,14 @@ es5id: 15.6.4.2_A2_T3
 description: transferring to the Date objects
 ---*/
 
+var s1 = new Date(0);
+Object.defineProperty(s1, "toString", {value: Boolean.prototype.toString});
 assert.throws(TypeError, () => {
-  var s1 = new Date();
-  s1.toString = Boolean.prototype.toString;
   s1.toString();
 });
 
+var s2 = new Date(0);
+s2.myToString = Boolean.prototype.toString;
 assert.throws(TypeError, () => {
-  var s2 = new Date();
-  s2.myToString = Boolean.prototype.toString;
   s2.myToString();
 });
diff --git a/test/built-ins/Date/is-a-constructor.js b/test/built-ins/Date/is-a-constructor.js
index 92bc249c6b..cb08818c08 100644
--- a/test/built-ins/Date/is-a-constructor.js
+++ b/test/built-ins/Date/is-a-constructor.js
@@ -20,5 +20,5 @@ features: [Reflect.construct]
 ---*/
 
 assert.sameValue(isConstructor(Date), true, 'isConstructor(Date) must return true');
-new Date();
+new Date(0);
   
diff --git a/test/built-ins/Date/proto-from-ctor-realm-zero.js b/test/built-ins/Date/proto-from-ctor-realm-zero.js
index 00cb0ddd1e..de8497420d 100644
--- a/test/built-ins/Date/proto-from-ctor-realm-zero.js
+++ b/test/built-ins/Date/proto-from-ctor-realm-zero.js
@@ -25,6 +25,6 @@ var other = $262.createRealm().global;
 var C = new other.Function();
 C.prototype = null;
 
-var o = Reflect.construct(Date, [], C);
+var o = Reflect.construct(Date, [0], C);
 
 assert.sameValue(Object.getPrototypeOf(o), other.Date.prototype);
diff --git a/test/built-ins/Date/prototype/Symbol.toPrimitive/hint-invalid.js b/test/built-ins/Date/prototype/Symbol.toPrimitive/hint-invalid.js
index 09f2837474..6be45c6b2f 100644
--- a/test/built-ins/Date/prototype/Symbol.toPrimitive/hint-invalid.js
+++ b/test/built-ins/Date/prototype/Symbol.toPrimitive/hint-invalid.js
@@ -14,7 +14,7 @@ info: |
 features: [Symbol.toPrimitive]
 ---*/
 
-var d = new Date();
+var d = new Date(0);
 
 assert.sameValue(typeof d[Symbol.toPrimitive], 'function');
 
diff --git a/test/built-ins/Date/prototype/setDate/arg-to-number-err.js b/test/built-ins/Date/prototype/setDate/arg-to-number-err.js
index 663afa94c4..cf01faf203 100644
--- a/test/built-ins/Date/prototype/setDate/arg-to-number-err.js
+++ b/test/built-ins/Date/prototype/setDate/arg-to-number-err.js
@@ -8,7 +8,7 @@ info: |
   2. Let dt be ? ToNumber(date).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var originalValue = date.getTime();
 var obj = {
   valueOf: function() {
diff --git a/test/built-ins/Date/prototype/setFullYear/arg-date-to-number-err.js b/test/built-ins/Date/prototype/setFullYear/arg-date-to-number-err.js
index f1b0358b5a..0fcea27487 100644
--- a/test/built-ins/Date/prototype/setFullYear/arg-date-to-number-err.js
+++ b/test/built-ins/Date/prototype/setFullYear/arg-date-to-number-err.js
@@ -13,7 +13,7 @@ info: |
      ? ToNumber(date).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var originalValue = date.getTime();
 var obj = {
   valueOf: function() {
diff --git a/test/built-ins/Date/prototype/setFullYear/arg-month-to-number-err.js b/test/built-ins/Date/prototype/setFullYear/arg-month-to-number-err.js
index f1de8478df..8720569022 100644
--- a/test/built-ins/Date/prototype/setFullYear/arg-month-to-number-err.js
+++ b/test/built-ins/Date/prototype/setFullYear/arg-month-to-number-err.js
@@ -11,7 +11,7 @@ info: |
      ? ToNumber(month).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var callCount = 0;
 var originalValue = date.getTime();
 var obj = {
diff --git a/test/built-ins/Date/prototype/setFullYear/arg-year-to-number-err.js b/test/built-ins/Date/prototype/setFullYear/arg-year-to-number-err.js
index 67fe061bcb..3c98884235 100644
--- a/test/built-ins/Date/prototype/setFullYear/arg-year-to-number-err.js
+++ b/test/built-ins/Date/prototype/setFullYear/arg-year-to-number-err.js
@@ -9,7 +9,7 @@ info: |
   3. Let y be ? ToNumber(year).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var callCount = 0;
 var originalValue = date.getTime();
 var obj = {
diff --git a/test/built-ins/Date/prototype/setHours/arg-hour-to-number-err.js b/test/built-ins/Date/prototype/setHours/arg-hour-to-number-err.js
index 7db1c80a09..50c06cb065 100644
--- a/test/built-ins/Date/prototype/setHours/arg-hour-to-number-err.js
+++ b/test/built-ins/Date/prototype/setHours/arg-hour-to-number-err.js
@@ -8,7 +8,7 @@ info: |
   2. Let dt be ? ToNumber(hour).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var callCount = 0;
 var originalValue = date.getTime();
 var obj = {
diff --git a/test/built-ins/Date/prototype/setHours/arg-min-to-number-err.js b/test/built-ins/Date/prototype/setHours/arg-min-to-number-err.js
index 2caa05ccee..56ae58ebd3 100644
--- a/test/built-ins/Date/prototype/setHours/arg-min-to-number-err.js
+++ b/test/built-ins/Date/prototype/setHours/arg-min-to-number-err.js
@@ -10,7 +10,7 @@ info: |
      ToNumber(min).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var callCount = 0;
 var originalValue = date.getTime();
 var obj = {
diff --git a/test/built-ins/Date/prototype/setHours/arg-ms-to-number-err.js b/test/built-ins/Date/prototype/setHours/arg-ms-to-number-err.js
index ef6730c087..4b6b4e0bc3 100644
--- a/test/built-ins/Date/prototype/setHours/arg-ms-to-number-err.js
+++ b/test/built-ins/Date/prototype/setHours/arg-ms-to-number-err.js
@@ -14,7 +14,7 @@ info: |
      be ? ToNumber(ms).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var originalValue = date.getTime();
 var obj = {
   valueOf: function() {
diff --git a/test/built-ins/Date/prototype/setHours/arg-sec-to-number-err.js b/test/built-ins/Date/prototype/setHours/arg-sec-to-number-err.js
index 9284ead229..a31f8df9a0 100644
--- a/test/built-ins/Date/prototype/setHours/arg-sec-to-number-err.js
+++ b/test/built-ins/Date/prototype/setHours/arg-sec-to-number-err.js
@@ -12,7 +12,7 @@ info: |
      ToNumber(sec).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var callCount = 0;
 var originalValue = date.getTime();
 var obj = {
diff --git a/test/built-ins/Date/prototype/setMilliseconds/arg-to-number-err.js b/test/built-ins/Date/prototype/setMilliseconds/arg-to-number-err.js
index b802bb1650..1ef63f08d4 100644
--- a/test/built-ins/Date/prototype/setMilliseconds/arg-to-number-err.js
+++ b/test/built-ins/Date/prototype/setMilliseconds/arg-to-number-err.js
@@ -8,7 +8,7 @@ info: |
   2. Let dt be ? ToNumber(date).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var originalValue = date.getTime();
 var obj = {
   valueOf: function() {
diff --git a/test/built-ins/Date/prototype/setMinutes/arg-min-to-number-err.js b/test/built-ins/Date/prototype/setMinutes/arg-min-to-number-err.js
index c54c3410c0..4c31d2d4cd 100644
--- a/test/built-ins/Date/prototype/setMinutes/arg-min-to-number-err.js
+++ b/test/built-ins/Date/prototype/setMinutes/arg-min-to-number-err.js
@@ -8,7 +8,7 @@ info: |
   2. Let m be ? ToNumber(min).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var callCount = 0;
 var originalValue = date.getTime();
 var obj = {
diff --git a/test/built-ins/Date/prototype/setMinutes/arg-ms-to-number-err.js b/test/built-ins/Date/prototype/setMinutes/arg-ms-to-number-err.js
index b4a67ba88d..54e7bbfb05 100644
--- a/test/built-ins/Date/prototype/setMinutes/arg-ms-to-number-err.js
+++ b/test/built-ins/Date/prototype/setMinutes/arg-ms-to-number-err.js
@@ -12,7 +12,7 @@ info: |
      be ? ToNumber(ms).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var originalValue = date.getTime();
 var obj = {
   valueOf: function() {
diff --git a/test/built-ins/Date/prototype/setMinutes/arg-sec-to-number-err.js b/test/built-ins/Date/prototype/setMinutes/arg-sec-to-number-err.js
index 7d082878d4..4460de0feb 100644
--- a/test/built-ins/Date/prototype/setMinutes/arg-sec-to-number-err.js
+++ b/test/built-ins/Date/prototype/setMinutes/arg-sec-to-number-err.js
@@ -10,7 +10,7 @@ info: |
      ToNumber(sec).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var callCount = 0;
 var originalValue = date.getTime();
 var obj = {
diff --git a/test/built-ins/Date/prototype/setMonth/arg-date-to-number-err.js b/test/built-ins/Date/prototype/setMonth/arg-date-to-number-err.js
index 93295d9c16..70b549f26b 100644
--- a/test/built-ins/Date/prototype/setMonth/arg-date-to-number-err.js
+++ b/test/built-ins/Date/prototype/setMonth/arg-date-to-number-err.js
@@ -10,7 +10,7 @@ info: |
      ? ToNumber(date).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var originalValue = date.getTime();
 var obj = {
   valueOf: function() {
diff --git a/test/built-ins/Date/prototype/setMonth/arg-month-to-number-err.js b/test/built-ins/Date/prototype/setMonth/arg-month-to-number-err.js
index bd7a5a489b..64e61a7406 100644
--- a/test/built-ins/Date/prototype/setMonth/arg-month-to-number-err.js
+++ b/test/built-ins/Date/prototype/setMonth/arg-month-to-number-err.js
@@ -11,7 +11,7 @@ info: |
      ? ToNumber(month).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var callCount = 0;
 var originalValue = date.getTime();
 var obj = {
diff --git a/test/built-ins/Date/prototype/setSeconds/arg-ms-to-number-err.js b/test/built-ins/Date/prototype/setSeconds/arg-ms-to-number-err.js
index e3e68be873..c02c60dee6 100644
--- a/test/built-ins/Date/prototype/setSeconds/arg-ms-to-number-err.js
+++ b/test/built-ins/Date/prototype/setSeconds/arg-ms-to-number-err.js
@@ -10,7 +10,7 @@ info: |
      be ? ToNumber(ms).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var originalValue = date.getTime();
 var obj = {
   valueOf: function() {
diff --git a/test/built-ins/Date/prototype/setSeconds/arg-sec-to-number-err.js b/test/built-ins/Date/prototype/setSeconds/arg-sec-to-number-err.js
index 1058a1b604..a22e9115ae 100644
--- a/test/built-ins/Date/prototype/setSeconds/arg-sec-to-number-err.js
+++ b/test/built-ins/Date/prototype/setSeconds/arg-sec-to-number-err.js
@@ -8,7 +8,7 @@ info: |
   2. Let s be ? ToNumber(sec).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var callCount = 0;
 var originalValue = date.getTime();
 var obj = {
diff --git a/test/built-ins/Date/prototype/setTime/arg-to-number-err.js b/test/built-ins/Date/prototype/setTime/arg-to-number-err.js
index 1fe0fe74da..7d47e1f700 100644
--- a/test/built-ins/Date/prototype/setTime/arg-to-number-err.js
+++ b/test/built-ins/Date/prototype/setTime/arg-to-number-err.js
@@ -8,7 +8,7 @@ info: |
   2. Let t be ? ToNumber(time).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 var originalValue = date.getTime();
 var obj = {
   valueOf: function() {
diff --git a/test/built-ins/Date/prototype/setTime/new-value-time-clip.js b/test/built-ins/Date/prototype/setTime/new-value-time-clip.js
index e06c786f5f..610e42d527 100644
--- a/test/built-ins/Date/prototype/setTime/new-value-time-clip.js
+++ b/test/built-ins/Date/prototype/setTime/new-value-time-clip.js
@@ -17,7 +17,7 @@ info: |
 ---*/
 
 var maxMs = 8.64e15;
-var date = new Date();
+var date = new Date(0);
 var returnValue;
 
 assert.notSameValue(date.getTime(), NaN);
diff --git a/test/built-ins/Date/prototype/toDateString/format.js b/test/built-ins/Date/prototype/toDateString/format.js
index f9e58dd0ae..cd384f677b 100644
--- a/test/built-ins/Date/prototype/toDateString/format.js
+++ b/test/built-ins/Date/prototype/toDateString/format.js
@@ -11,7 +11,7 @@ info: |
 ---*/
 
 let dateRegExp = /^(Sun|Mon|Tue|Wed|Thu|Fri|Sat) (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) [0-9]{2} [0-9]{4}$/
-let match = dateRegExp.exec(new Date().toDateString());
+let match = dateRegExp.exec(new Date(0).toDateString());
 assert.notSameValue(null, match);
 
 // Years are padded to the left with zeroes
diff --git a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-10.js b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-10.js
index 28245a02d8..9ea20f6838 100644
--- a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-10.js
+++ b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-10.js
@@ -9,7 +9,7 @@ description: >
     UTC(0)
 ---*/
 
-var timeZoneMinutes = new Date().getTimezoneOffset() * (-1);
+var timeZoneMinutes = new Date(0).getTimezoneOffset() * (-1);
 var date, dateStr;
 
 if (timeZoneMinutes > 0) {
diff --git a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-11.js b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-11.js
index 66496295f2..c712fac6f4 100644
--- a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-11.js
+++ b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-11.js
@@ -9,7 +9,7 @@ description: >
     UTC(0)
 ---*/
 
-var timeZoneMinutes = new Date().getTimezoneOffset() * (-1);
+var timeZoneMinutes = new Date(0).getTimezoneOffset() * (-1);
 var date, dateStr;
 
 date = new Date(1970, 0, 100000001, 0, 0 + timeZoneMinutes - 60, 0, -1);
diff --git a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-12.js b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-12.js
index c7822354a9..923f0340b7 100644
--- a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-12.js
+++ b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-12.js
@@ -9,7 +9,7 @@ description: >
     UTC(0)
 ---*/
 
-var timeZoneMinutes = new Date().getTimezoneOffset() * (-1);
+var timeZoneMinutes = new Date(0).getTimezoneOffset() * (-1);
 var date, dateStr;
 
 date = new Date(1970, 0, 100000001, 0, 0 + timeZoneMinutes - 60, 0, 0);
diff --git a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-5.js b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-5.js
index d58b1d1016..686fbfaafd 100644
--- a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-5.js
+++ b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-5.js
@@ -8,6 +8,6 @@ description: >
     zone(0)
 ---*/
 
-var dateStr = (new Date()).toISOString();
+var dateStr = (new Date(0)).toISOString();
 
 assert.sameValue(dateStr[dateStr.length - 1], "Z", 'dateStr[dateStr.length - 1]');
diff --git a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-8.js b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-8.js
index f6a2725648..82548da442 100644
--- a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-8.js
+++ b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-8.js
@@ -9,7 +9,7 @@ description: >
     UTC(0)
 ---*/
 
-var timeZoneMinutes = new Date().getTimezoneOffset() * (-1);
+var timeZoneMinutes = new Date(0).getTimezoneOffset() * (-1);
 var date, dateStr;
 assert.throws(RangeError, function() {
   if (timeZoneMinutes > 0) {
diff --git a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-9.js b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-9.js
index 07d919126c..787ec8e7bb 100644
--- a/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-9.js
+++ b/test/built-ins/Date/prototype/toISOString/15.9.5.43-0-9.js
@@ -9,7 +9,7 @@ description: >
     UTC(0)
 ---*/
 
-var timeZoneMinutes = new Date().getTimezoneOffset() * (-1);
+var timeZoneMinutes = new Date(0).getTimezoneOffset() * (-1);
 var date, dateStr;
 
 if (timeZoneMinutes > 0) {
diff --git a/test/built-ins/Date/prototype/toJSON/invoke-result.js b/test/built-ins/Date/prototype/toJSON/invoke-result.js
index 0977bda24b..84548bcd64 100644
--- a/test/built-ins/Date/prototype/toJSON/invoke-result.js
+++ b/test/built-ins/Date/prototype/toJSON/invoke-result.js
@@ -17,7 +17,7 @@ info: |
   4. Return ? Call(func, V, argumentsList).
 ---*/
 
-var date = new Date();
+var date = new Date(0);
 assert.sameValue(date.toJSON(), date.toISOString());
 
 var result = {};
diff --git a/test/built-ins/Date/prototype/toString/format.js b/test/built-ins/Date/prototype/toString/format.js
index 9212134aac..dfb73df1e5 100644
--- a/test/built-ins/Date/prototype/toString/format.js
+++ b/test/built-ins/Date/prototype/toString/format.js
@@ -12,7 +12,7 @@ info: |
 ---*/
 
 let stringRegExp = /^(Sun|Mon|Tue|Wed|Thu|Fri|Sat) (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) [0-9]{2} [0-9]{4} [0-9]{2}:[0-9]{2}:[0-9]{2} GMT[+-][0-9]{4}( \(.+\))?$/
-let match = stringRegExp.exec(new Date().toString());
+let match = stringRegExp.exec(new Date(0).toString());
 assert.notSameValue(null, match);
 
 // Years are padded to the left with zeroes
diff --git a/test/built-ins/Date/prototype/toTimeString/format.js b/test/built-ins/Date/prototype/toTimeString/format.js
index bbc4509434..7b2a1d98e3 100644
--- a/test/built-ins/Date/prototype/toTimeString/format.js
+++ b/test/built-ins/Date/prototype/toTimeString/format.js
@@ -11,5 +11,5 @@ info: |
 ---*/
 
 let timeRegExp = /^[0-9]{2}:[0-9]{2}:[0-9]{2} GMT[+-][0-9]{4}( \(.+\))?$/
-let match = timeRegExp.exec(new Date().toTimeString());
+let match = timeRegExp.exec(new Date(0).toTimeString());
 assert.notSameValue(null, match);
diff --git a/test/built-ins/Date/prototype/toUTCString/format.js b/test/built-ins/Date/prototype/toUTCString/format.js
index 011d094a13..a651fae7e6 100644
--- a/test/built-ins/Date/prototype/toUTCString/format.js
+++ b/test/built-ins/Date/prototype/toUTCString/format.js
@@ -11,7 +11,7 @@ info: |
 ---*/
 
 let utcRegExp = /^(Sun|Mon|Tue|Wed|Thu|Fri|Sat), [0-9]{2} (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) [0-9]{4} [0-9]{2}:[0-9]{2}:[0-9]{2} GMT$/
-let match = utcRegExp.exec(new Date().toUTCString());
+let match = utcRegExp.exec(new Date(0).toUTCString());
 assert.notSameValue(null, match);
 
 // Years are padded to the left with zeroes
diff --git a/test/built-ins/Number/prototype/toString/S15.7.4.2_A4_T03.js b/test/built-ins/Number/prototype/toString/S15.7.4.2_A4_T03.js
index fdde13dbb1..d4d4176aa3 100644
--- a/test/built-ins/Number/prototype/toString/S15.7.4.2_A4_T03.js
+++ b/test/built-ins/Number/prototype/toString/S15.7.4.2_A4_T03.js
@@ -10,9 +10,9 @@ es5id: 15.7.4.2_A4_T03
 description: transferring to the Date objects
 ---*/
 
+var s1 = new Date(0);
+Object.defineProperty(s1, "toString", {value: Number.prototype.toString});
 try {
-  var s1 = new Date();
-  s1.toString = Number.prototype.toString;
   var v1 = s1.toString();
   throw new Test262Error('#1: Number.prototype.toString on not a Number object should throw TypeError');
 }
@@ -20,9 +20,9 @@ catch (e) {
   assert(e instanceof TypeError, 'The result of evaluating (e instanceof TypeError) is expected to be true');
 }
 
+var s2 = new Date(0);
+s2.myToString = Number.prototype.toString;
 try {
-  var s2 = new Date();
-  s2.myToString = Number.prototype.toString;
   var v2 = s2.myToString();
   throw new Test262Error('#2: Number.prototype.toString on not a Number object should throw TypeError');
 }
diff --git a/test/built-ins/Number/prototype/valueOf/S15.7.4.4_A2_T03.js b/test/built-ins/Number/prototype/valueOf/S15.7.4.4_A2_T03.js
index 89d7f0299c..5f50474e6d 100644
--- a/test/built-ins/Number/prototype/valueOf/S15.7.4.4_A2_T03.js
+++ b/test/built-ins/Number/prototype/valueOf/S15.7.4.4_A2_T03.js
@@ -10,9 +10,9 @@ es5id: 15.7.4.4_A2_T03
 description: transferring to the Date objects
 ---*/
 
+var s1 = new Date(0);
+Object.defineProperty(s1, "valueOf", {value: Number.prototype.valueOf});
 try {
-  var s1 = new Date();
-  s1.valueOf = Number.prototype.valueOf;
   var v1 = s1.valueOf();
   throw new Test262Error('#1: Number.prototype.valueOf on not a Number object should throw TypeError');
 }
@@ -20,9 +20,9 @@ catch (e) {
   assert(e instanceof TypeError, 'The result of evaluating (e instanceof TypeError) is expected to be true');
 }
 
+var s2 = new Date(0);
+s2.myValueOf = Number.prototype.valueOf;
 try {
-  var s2 = new Date();
-  s2.myValueOf = Number.prototype.valueOf;
   var v2 = s2.myValueOf();
   throw new Test262Error('#2: Number.prototype.valueOf on not a Number object should throw TypeError');
 }
diff --git a/test/built-ins/Object/create/15.2.3.5-4-11.js b/test/built-ins/Object/create/15.2.3.5-4-11.js
index 7f997a2449..8c6d99fe36 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-11.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-11.js
@@ -8,7 +8,7 @@ description: >
     step 2)
 ---*/
 
-var props = new Date();
+var props = new Date(0);
 var result = false;
 
 Object.defineProperty(props, "prop", {
diff --git a/test/built-ins/Object/create/15.2.3.5-4-118.js b/test/built-ins/Object/create/15.2.3.5-4-118.js
index 07a0c5613d..be703cc67b 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-118.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-118.js
@@ -9,7 +9,7 @@ description: >
     (8.10.5 step 4.a)
 ---*/
 
-var descObj = new Date();
+var descObj = new Date(0);
 
 descObj.configurable = true;
 
diff --git a/test/built-ins/Object/create/15.2.3.5-4-143.js b/test/built-ins/Object/create/15.2.3.5-4-143.js
index fd08e43a9c..9fae1fa135 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-143.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-143.js
@@ -10,7 +10,7 @@ description: >
 
 var newObj = Object.create({}, {
   prop: {
-    configurable: new Date()
+    configurable: new Date(0)
   }
 });
 
diff --git a/test/built-ins/Object/create/15.2.3.5-4-171.js b/test/built-ins/Object/create/15.2.3.5-4-171.js
index a603d0dff6..852bef35a6 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-171.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-171.js
@@ -9,7 +9,7 @@ description: >
     (8.10.5 step 5.a)
 ---*/
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 
 dateObj.value = "DateValue";
 
diff --git a/test/built-ins/Object/create/15.2.3.5-4-197.js b/test/built-ins/Object/create/15.2.3.5-4-197.js
index fdf8704b59..33270ea0e2 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-197.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-197.js
@@ -9,7 +9,7 @@ description: >
     (8.10.5 step 6.a)
 ---*/
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 
 dateObj.writable = true;
 
diff --git a/test/built-ins/Object/create/15.2.3.5-4-222.js b/test/built-ins/Object/create/15.2.3.5-4-222.js
index 2f03b51e3d..4849d7aa37 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-222.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-222.js
@@ -10,7 +10,7 @@ description: >
 
 var newObj = Object.create({}, {
   prop: {
-    writable: new Date()
+    writable: new Date(0)
   }
 });
 var hasProperty = newObj.hasOwnProperty("prop");
diff --git a/test/built-ins/Object/create/15.2.3.5-4-249.js b/test/built-ins/Object/create/15.2.3.5-4-249.js
index afbf4ec88e..a0570c2f24 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-249.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-249.js
@@ -9,7 +9,7 @@ description: >
     step 7.a)
 ---*/
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 
 dateObj.get = function() {
   return "VerifyDateObject";
diff --git a/test/built-ins/Object/create/15.2.3.5-4-285.js b/test/built-ins/Object/create/15.2.3.5-4-285.js
index 04a3b4b423..e45a112e1a 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-285.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-285.js
@@ -9,7 +9,7 @@ description: >
     step 8.a)
 ---*/
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 var data = "data";
 dateObj.set = function(value) {
   data = value;
diff --git a/test/built-ins/Object/create/15.2.3.5-4-297.js b/test/built-ins/Object/create/15.2.3.5-4-297.js
index 36a3c9acbf..e360135887 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-297.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-297.js
@@ -12,7 +12,7 @@ description: >
 assert.throws(TypeError, function() {
   Object.create({}, {
     prop: {
-      set: new Date()
+      set: new Date(0)
     }
   });
 });
diff --git a/test/built-ins/Object/create/15.2.3.5-4-34.js b/test/built-ins/Object/create/15.2.3.5-4-34.js
index c2d007dea6..3424f224c7 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-34.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-34.js
@@ -9,7 +9,7 @@ description: >
     5.a)
 ---*/
 
-var props = new Date();
+var props = new Date(0);
 props.prop = {
   value: 12,
   enumerable: true
diff --git a/test/built-ins/Object/create/15.2.3.5-4-65.js b/test/built-ins/Object/create/15.2.3.5-4-65.js
index d0761a6fd7..74f51d94c9 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-65.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-65.js
@@ -10,7 +10,7 @@ description: >
 ---*/
 
 var accessed = false;
-var descObj = new Date();
+var descObj = new Date(0);
 
 descObj.enumerable = true;
 
diff --git a/test/built-ins/Object/create/15.2.3.5-4-90.js b/test/built-ins/Object/create/15.2.3.5-4-90.js
index b953f2f2bc..f8d90529e4 100644
--- a/test/built-ins/Object/create/15.2.3.5-4-90.js
+++ b/test/built-ins/Object/create/15.2.3.5-4-90.js
@@ -12,7 +12,7 @@ var accessed = false;
 
 var newObj = Object.create({}, {
   prop: {
-    enumerable: new Date()
+    enumerable: new Date(0)
   }
 });
 for (var property in newObj) {
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-2-12.js b/test/built-ins/Object/defineProperties/15.2.3.7-2-12.js
index 103a8ea8d1..bf440593cd 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-2-12.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-2-12.js
@@ -7,7 +7,7 @@ description: Object.defineProperties - argument 'Properties' is a Date object
 ---*/
 
 var obj = {};
-var props = new Date();
+var props = new Date(0);
 var result = false;
 
 Object.defineProperty(props, "prop", {
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-5-a-13.js b/test/built-ins/Object/defineProperties/15.2.3.7-5-a-13.js
index bf4aaa78f4..06ecbd2c2e 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-5-a-13.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-5-a-13.js
@@ -9,7 +9,7 @@ description: >
 ---*/
 
 var obj = {};
-var props = new Date();
+var props = new Date(0);
 
 Object.defineProperty(props, "prop", {
   value: {
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-103.js b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-103.js
index 4a1ab03d5b..85d9a96b65 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-103.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-103.js
@@ -12,7 +12,7 @@ var obj = {};
 
 Object.defineProperties(obj, {
   property: {
-    configurable: new Date()
+    configurable: new Date(0)
   }
 });
 var preCheck = obj.hasOwnProperty("property");
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-131.js b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-131.js
index a10e3a907b..b4c6035bcc 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-131.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-131.js
@@ -11,7 +11,7 @@ description: >
 
 var obj = {};
 
-var descObj = new Date();
+var descObj = new Date(0);
 
 descObj.value = "Date";
 
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-157.js b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-157.js
index 74413b7de6..6d636f4e09 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-157.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-157.js
@@ -12,7 +12,7 @@ includes: [propertyHelper.js]
 
 var obj = {};
 
-var descObj = new Date();
+var descObj = new Date(0);
 
 descObj.writable = false;
 
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-182.js b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-182.js
index 8563d4f3b0..7c211cb310 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-182.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-182.js
@@ -12,7 +12,7 @@ var obj = {};
 
 Object.defineProperties(obj, {
   property: {
-    writable: new Date()
+    writable: new Date(0)
   }
 });
 
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-210.js b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-210.js
index f49214a034..074f9425ba 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-210.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-210.js
@@ -11,7 +11,7 @@ description: >
 
 var obj = {};
 
-var descObj = new Date();
+var descObj = new Date(0);
 
 descObj.get = function() {
   return "Date";
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-245.js b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-245.js
index a8d8f226e5..04a10ef284 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-245.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-245.js
@@ -10,7 +10,7 @@ description: >
 ---*/
 
 var data = "data";
-var descObj = new Date();
+var descObj = new Date(0);
 var setFun = function(value) {
   data = value;
 };
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-25.js b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-25.js
index 2492ea6eb8..c137ed86bd 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-25.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-25.js
@@ -10,7 +10,7 @@ description: >
 ---*/
 
 var obj = {};
-var descObj = new Date();
+var descObj = new Date(0);
 var accessed = false;
 
 descObj.enumerable = true;
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-50.js b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-50.js
index 7f99adc4af..f54a8f45cd 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-50.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-50.js
@@ -13,7 +13,7 @@ var accessed = false;
 
 Object.defineProperties(obj, {
   prop: {
-    enumerable: new Date()
+    enumerable: new Date(0)
   }
 });
 for (var property in obj) {
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-78.js b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-78.js
index 6fe2d9e0b7..f5a7eafd8a 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-5-b-78.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-5-b-78.js
@@ -11,7 +11,7 @@ description: >
 
 var obj = {};
 
-var descObj = new Date();
+var descObj = new Date(0);
 descObj.configurable = true;
 
 Object.defineProperties(obj, {
diff --git a/test/built-ins/Object/defineProperties/15.2.3.7-6-a-18.js b/test/built-ins/Object/defineProperties/15.2.3.7-6-a-18.js
index 74e1566795..36869b80a9 100644
--- a/test/built-ins/Object/defineProperties/15.2.3.7-6-a-18.js
+++ b/test/built-ins/Object/defineProperties/15.2.3.7-6-a-18.js
@@ -10,7 +10,7 @@ includes: [propertyHelper.js]
 ---*/
 
 
-var obj = new Date();
+var obj = new Date(0);
 
 Object.defineProperty(obj, "prop", {
   value: 11,
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-3-117.js b/test/built-ins/Object/defineProperty/15.2.3.6-3-117.js
index 04d74d887e..faf477b21a 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-3-117.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-3-117.js
@@ -11,7 +11,7 @@ description: >
 var obj = {};
 
 Object.defineProperty(obj, "property", {
-  configurable: new Date()
+  configurable: new Date(0)
 });
 
 var beforeDeleted = obj.hasOwnProperty("property");
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-3-145.js b/test/built-ins/Object/defineProperty/15.2.3.6-3-145.js
index 2fa41afc51..ec8f0932fe 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-3-145.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-3-145.js
@@ -11,7 +11,7 @@ description: >
 
 var obj = {};
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 
 dateObj.value = "Date";
 
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-3-171.js b/test/built-ins/Object/defineProperty/15.2.3.6-3-171.js
index 15f8cc9e88..b2caab26be 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-3-171.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-3-171.js
@@ -11,7 +11,7 @@ description: >
 
 var obj = {};
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 
 dateObj.writable = true;
 
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-3-196.js b/test/built-ins/Object/defineProperty/15.2.3.6-3-196.js
index 62c4cd7d7c..7e1f700238 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-3-196.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-3-196.js
@@ -11,7 +11,7 @@ description: >
 var obj = {};
 
 Object.defineProperty(obj, "property", {
-  writable: new Date()
+  writable: new Date(0)
 });
 
 var beforeWrite = obj.hasOwnProperty("property");
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-3-224.js b/test/built-ins/Object/defineProperty/15.2.3.6-3-224.js
index 3b6b143c43..4c81cd678a 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-3-224.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-3-224.js
@@ -11,7 +11,7 @@ description: >
 
 var obj = {};
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 
 dateObj.get = function() {
   return "dateGetProperty";
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-3-254.js b/test/built-ins/Object/defineProperty/15.2.3.6-3-254.js
index 3c5799b94b..93e7e5d4fd 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-3-254.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-3-254.js
@@ -11,7 +11,7 @@ description: >
 
 var obj = {};
 var data = "data";
-var dateObj = new Date();
+var dateObj = new Date(0);
 
 dateObj.set = function(value) {
   data = value;
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-3-39.js b/test/built-ins/Object/defineProperty/15.2.3.6-3-39.js
index 605f7a5f9f..e55556f66e 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-3-39.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-3-39.js
@@ -12,7 +12,7 @@ description: >
 var obj = {};
 var accessed = false;
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 dateObj.enumerable = true;
 
 Object.defineProperty(obj, "property", dateObj);
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-3-64.js b/test/built-ins/Object/defineProperty/15.2.3.6-3-64.js
index 4cd67c97d7..acf952ed12 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-3-64.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-3-64.js
@@ -12,7 +12,7 @@ var obj = {};
 var accessed = false;
 
 Object.defineProperty(obj, "property", {
-  enumerable: new Date()
+  enumerable: new Date(0)
 });
 
 for (var prop in obj) {
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-3-92.js b/test/built-ins/Object/defineProperty/15.2.3.6-3-92.js
index 1afb867676..5490af1dbc 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-3-92.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-3-92.js
@@ -11,7 +11,7 @@ description: >
 
 var obj = {};
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 
 dateObj.configurable = true;
 
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-4-39.js b/test/built-ins/Object/defineProperty/15.2.3.6-4-39.js
index 62173de61a..5b54c71e93 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-4-39.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-4-39.js
@@ -9,7 +9,7 @@ description: >
     step 1)
 ---*/
 
-var desc = new Date();
+var desc = new Date(0);
 
 Object.defineProperty(desc, "foo", {
   value: 12,
diff --git a/test/built-ins/Object/defineProperty/15.2.3.6-4-392.js b/test/built-ins/Object/defineProperty/15.2.3.6-4-392.js
index 79cf9e5164..8ba763f886 100644
--- a/test/built-ins/Object/defineProperty/15.2.3.6-4-392.js
+++ b/test/built-ins/Object/defineProperty/15.2.3.6-4-392.js
@@ -9,7 +9,7 @@ description: >
 ---*/
 
 var obj = {};
-var dateObj = new Date();
+var dateObj = new Date(0);
 
 Object.defineProperty(obj, "prop", {
   value: dateObj
diff --git a/test/built-ins/Object/freeze/15.2.3.9-2-d-6.js b/test/built-ins/Object/freeze/15.2.3.9-2-d-6.js
index 1b82d65614..f471776f3b 100644
--- a/test/built-ins/Object/freeze/15.2.3.9-2-d-6.js
+++ b/test/built-ins/Object/freeze/15.2.3.9-2-d-6.js
@@ -6,7 +6,7 @@ es5id: 15.2.3.9-2-d-6
 description: Object.freeze - 'O' is a Date object
 ---*/
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 
 Object.freeze(dateObj);
 
diff --git a/test/built-ins/Object/getPrototypeOf/15.2.3.2-2-25.js b/test/built-ins/Object/getPrototypeOf/15.2.3.2-2-25.js
index 9cac453932..27bfd08c2d 100644
--- a/test/built-ins/Object/getPrototypeOf/15.2.3.2-2-25.js
+++ b/test/built-ins/Object/getPrototypeOf/15.2.3.2-2-25.js
@@ -8,6 +8,6 @@ description: >
     (Date object)
 ---*/
 
-var obj = new Date();
+var obj = new Date(0);
 
 assert.sameValue(Object.getPrototypeOf(obj), Date.prototype, 'Object.getPrototypeOf(obj)');
diff --git a/test/built-ins/Object/keys/15.2.3.14-6-5.js b/test/built-ins/Object/keys/15.2.3.14-6-5.js
index 4bd098a3ef..12ff4fb47e 100644
--- a/test/built-ins/Object/keys/15.2.3.14-6-5.js
+++ b/test/built-ins/Object/keys/15.2.3.14-6-5.js
@@ -8,7 +8,7 @@ description: >
     with the order of properties in 'O' (any other built-in object)
 ---*/
 
-var obj = new Date();
+var obj = new Date(0);
 obj.prop1 = 100;
 obj.prop2 = "prop2";
 
diff --git a/test/built-ins/Object/preventExtensions/15.2.3.10-3-18.js b/test/built-ins/Object/preventExtensions/15.2.3.10-3-18.js
index 73378e1fd2..a31a3a3403 100644
--- a/test/built-ins/Object/preventExtensions/15.2.3.10-3-18.js
+++ b/test/built-ins/Object/preventExtensions/15.2.3.10-3-18.js
@@ -9,7 +9,7 @@ description: >
 includes: [propertyHelper.js]
 ---*/
 
-var obj = new Date();
+var obj = new Date(0);
 
 assert(Object.isExtensible(obj));
 Object.preventExtensions(obj);
diff --git a/test/built-ins/Object/preventExtensions/15.2.3.10-3-8.js b/test/built-ins/Object/preventExtensions/15.2.3.10-3-8.js
index 01a351d6fe..d5630585b6 100644
--- a/test/built-ins/Object/preventExtensions/15.2.3.10-3-8.js
+++ b/test/built-ins/Object/preventExtensions/15.2.3.10-3-8.js
@@ -9,7 +9,7 @@ description: >
 includes: [propertyHelper.js]
 ---*/
 
-var obj = new Date();
+var obj = new Date(0);
 
 assert(Object.isExtensible(obj));
 Object.preventExtensions(obj);
diff --git a/test/built-ins/Object/prototype/toString/Object.prototype.toString.call-date.js b/test/built-ins/Object/prototype/toString/Object.prototype.toString.call-date.js
index a422075aa0..8a38c0683a 100644
--- a/test/built-ins/Object/prototype/toString/Object.prototype.toString.call-date.js
+++ b/test/built-ins/Object/prototype/toString/Object.prototype.toString.call-date.js
@@ -6,12 +6,12 @@ esid: sec-object.prototype.tostring
 description: is a String exotic object, let builtinTag be "String".
 ---*/
 assert.sameValue(
-  Object.prototype.toString.call(new Date()),
+  Object.prototype.toString.call(new Date(0)),
   "[object Date]",
-  "Object.prototype.toString.call(new Date()) returns [object Date]"
+  "Object.prototype.toString.call(new Date(0)) returns [object Date]"
 );
 assert.sameValue(
-  Object.prototype.toString.call(Object(new Date())),
+  Object.prototype.toString.call(Object(new Date(0))),
   "[object Date]",
-  "Object.prototype.toString.call(Object(new Date())) returns [object Date]"
+  "Object.prototype.toString.call(Object(new Date(0))) returns [object Date]"
 );
diff --git a/test/built-ins/Object/prototype/toString/symbol-tag-override-instances.js b/test/built-ins/Object/prototype/toString/symbol-tag-override-instances.js
index 26f9f4bbf5..acb3c268ed 100644
--- a/test/built-ins/Object/prototype/toString/symbol-tag-override-instances.js
+++ b/test/built-ins/Object/prototype/toString/symbol-tag-override-instances.js
@@ -46,7 +46,7 @@ custom = new Number();
 custom[Symbol.toStringTag] = 'test262';
 assert.sameValue(Object.prototype.toString.call(custom), '[object test262]');
 
-custom = new Date();
+custom = new Date(0);
 custom[Symbol.toStringTag] = 'test262';
 assert.sameValue(Object.prototype.toString.call(custom), '[object test262]');
 
diff --git a/test/built-ins/Object/seal/object-seal-o-is-a-date-object.js b/test/built-ins/Object/seal/object-seal-o-is-a-date-object.js
index a14a0f19bf..d2d8754696 100644
--- a/test/built-ins/Object/seal/object-seal-o-is-a-date-object.js
+++ b/test/built-ins/Object/seal/object-seal-o-is-a-date-object.js
@@ -6,7 +6,7 @@ esid: sec-setintegritylevel
 description: Object.seal - 'O' is a Date object
 ---*/
 
-var dateObj = new Date();
+var dateObj = new Date(0);
 var preCheck = Object.isExtensible(dateObj);
 Object.seal(dateObj);
 
diff --git a/test/built-ins/Object/seal/object-seal-p-is-own-property-of-a-date-object-that-uses-object-s-get-own-property.js b/test/built-ins/Object/seal/object-seal-p-is-own-property-of-a-date-object-that-uses-object-s-get-own-property.js
index 57824620c0..c758c597ef 100644
--- a/test/built-ins/Object/seal/object-seal-p-is-own-property-of-a-date-object-that-uses-object-s-get-own-property.js
+++ b/test/built-ins/Object/seal/object-seal-p-is-own-property-of-a-date-object-that-uses-object-s-get-own-property.js
@@ -9,7 +9,7 @@ description: >
 includes: [propertyHelper.js]
 ---*/
 
-var obj = new Date();
+var obj = new Date(0);
 
 obj.foo = 10;
 
diff --git a/test/built-ins/Object/seal/seal-date.js b/test/built-ins/Object/seal/seal-date.js
index e4ccbc9bc8..fb18a79641 100644
--- a/test/built-ins/Object/seal/seal-date.js
+++ b/test/built-ins/Object/seal/seal-date.js
@@ -33,4 +33,4 @@ info: |
 
 ---*/
 
-Object.seal(new Date());
+Object.seal(new Date(0));
diff --git a/test/built-ins/Promise/all/invoke-then-error-close.js b/test/built-ins/Promise/all/invoke-then-error-close.js
index 72c48f48d3..93f3509728 100644
--- a/test/built-ins/Promise/all/invoke-then-error-close.js
+++ b/test/built-ins/Promise/all/invoke-then-error-close.js
@@ -42,9 +42,11 @@ iter[Symbol.iterator] = function() {
   };
 };
 
-promise.then = function() {
-  throw new Test262Error();
-};
+Object.defineProperty(promise, "then", {
+  value: function() {
+    throw new Test262Error();
+  }
+});
 
 Promise.all(iter);
 
diff --git a/test/built-ins/Promise/all/invoke-then-error-reject.js b/test/built-ins/Promise/all/invoke-then-error-reject.js
index 36ac1a6f5c..7214e2ef3c 100644
--- a/test/built-ins/Promise/all/invoke-then-error-reject.js
+++ b/test/built-ins/Promise/all/invoke-then-error-reject.js
@@ -28,9 +28,11 @@ flags: [async]
 var promise = new Promise(function() {});
 var error = new Test262Error();
 
-promise.then = function() {
-  throw error;
-};
+Object.defineProperty(promise, "then", {
+  value: function() {
+    throw error;
+  }
+});
 
 Promise.all([promise]).then(function() {
   throw new Test262Error('The promise should be rejected');
diff --git a/test/language/expressions/addition/S11.6.1_A2.2_T2.js b/test/language/expressions/addition/S11.6.1_A2.2_T2.js
index 690b67e7ca..cb685361f4 100644
--- a/test/language/expressions/addition/S11.6.1_A2.2_T2.js
+++ b/test/language/expressions/addition/S11.6.1_A2.2_T2.js
@@ -8,25 +8,25 @@ description: If Type(value) is Date object, evaluate ToPrimitive(value, String)
 ---*/
 
 //CHECK#1
-var date = new Date();
+var date = new Date(0);
 if (date + date !== date.toString() + date.toString()) {
-  throw new Test262Error('#1: var date = new Date(); date + date === date.toString() + date.toString(). Actual: ' + (date + date));  
+  throw new Test262Error('#1: var date = new Date(0); date + date === date.toString() + date.toString(). Actual: ' + (date + date));  
 }
 
 //CHECK#2
-var date = new Date();
+var date = new Date(0);
 if (date + 0 !== date.toString() + "0") {
-  throw new Test262Error('#2: var date = new Date(); date + 0 === date.toString() + "0". Actual: ' + (date + 0));  
+  throw new Test262Error('#2: var date = new Date(0); date + 0 === date.toString() + "0". Actual: ' + (date + 0));  
 }
 
 //CHECK#3
-var date = new Date();
+var date = new Date(0);
 if (date + true !== date.toString() + "true") {
-  throw new Test262Error('#3: var date = new Date(); date + true === date.toString() + "true". Actual: ' + (date + true));  
+  throw new Test262Error('#3: var date = new Date(0); date + true === date.toString() + "true". Actual: ' + (date + true));  
 }
 
 //CHECK#4
-var date = new Date();
+var date = new Date(0);
 if (date + new Object() !== date.toString() + "[object Object]") {
-  throw new Test262Error('#4: var date = new Date(); date + new Object() === date.toString() + "[object Object]". Actual: ' + (date + new Object()));  
+  throw new Test262Error('#4: var date = new Date(0); date + new Object() === date.toString() + "[object Object]". Actual: ' + (date + new Object()));  
 }
diff --git a/test/language/expressions/class/subclass-builtins/subclass-Date.js b/test/language/expressions/class/subclass-builtins/subclass-Date.js
index e22fbce496..7c37351dbf 100644
--- a/test/language/expressions/class/subclass-builtins/subclass-Date.js
+++ b/test/language/expressions/class/subclass-builtins/subclass-Date.js
@@ -2,13 +2,13 @@
 // - src/subclass-builtins/Date.case
 // - src/subclass-builtins/default/expression.template
 /*---
-description: new SubDate() instanceof Date (Subclass instanceof Heritage)
+description: new SubDate(0) instanceof Date (Subclass instanceof Heritage)
 flags: [generated]
 ---*/
 
 
 const Subclass = class extends Date {}
 
-const sub = new Subclass();
+const sub = new Subclass(0);
 assert(sub instanceof Subclass);
 assert(sub instanceof Date);
diff --git a/test/language/expressions/tagged-template/template-object-template-map.js b/test/language/expressions/tagged-template/template-object-template-map.js
index 4fec103c8d..6dc4f734ec 100644
--- a/test/language/expressions/tagged-template/template-object-template-map.js
+++ b/test/language/expressions/tagged-template/template-object-template-map.js
@@ -15,8 +15,9 @@ info: |
 ---*/
 var expect;
 var cache = [];
+var site = 1;
 function sameSite() {
-  tag`${Math.random()}`;
+  tag`${site++}`;
 }
 
 function tag(parameter) {
diff --git a/test/language/expressions/typeof/built-in-exotic-objects-no-call.js b/test/language/expressions/typeof/built-in-exotic-objects-no-call.js
index 0aab119170..498e0597bc 100644
--- a/test/language/expressions/typeof/built-in-exotic-objects-no-call.js
+++ b/test/language/expressions/typeof/built-in-exotic-objects-no-call.js
@@ -56,9 +56,9 @@ assert.sameValue(
 );
 
 assert.sameValue(
-  typeof new Date(),
+  typeof new Date(0),
    "object",
-  'typeof new Date() === "object"'
+  'typeof new Date(0) === "object"'
 );
 
 assert.sameValue(
diff --git a/test/language/statements/class/subclass-builtins/subclass-Date.js b/test/language/statements/class/subclass-builtins/subclass-Date.js
index 098ecf2172..a08d3d4ad0 100644
--- a/test/language/statements/class/subclass-builtins/subclass-Date.js
+++ b/test/language/statements/class/subclass-builtins/subclass-Date.js
@@ -2,13 +2,13 @@
 // - src/subclass-builtins/Date.case
 // - src/subclass-builtins/default/statement.template
 /*---
-description: new SubDate() instanceof Date (Subclass instanceof Heritage)
+description: new SubDate(0) instanceof Date (Subclass instanceof Heritage)
 flags: [generated]
 ---*/
 
 
 class Subclass extends Date {}
 
-const sub = new Subclass();
+const sub = new Subclass(0);
 assert(sub instanceof Subclass);
 assert(sub instanceof Date);
diff --git a/test/language/statements/class/subclass/builtin-objects/Date/super-must-be-called.js b/test/language/statements/class/subclass/builtin-objects/Date/super-must-be-called.js
index 4935b1e846..a5148035d5 100644
--- a/test/language/statements/class/subclass/builtin-objects/Date/super-must-be-called.js
+++ b/test/language/statements/class/subclass/builtin-objects/Date/super-must-be-called.js
@@ -23,13 +23,13 @@ class D extends Date {
 }
 
 assert.throws(ReferenceError, function() {
-  new D();
+  new D(0);
 });
 
 class D2 extends Date {
-  constructor() {
-    super();
+  constructor(d) {
+    super(d);
   }
 }
 
-new D2();
+new D2(0);