diff --git a/test/intl402/DateTimeFormat/12.1.1_1.js b/test/intl402/DateTimeFormat/12.1.1_1.js
index 5a042454a213352f713f4cbdbd315fb7e6afb69c..7d1d00413dc27bc1a745bf50d6a3be7b33bb41d4 100644
--- a/test/intl402/DateTimeFormat/12.1.1_1.js
+++ b/test/intl402/DateTimeFormat/12.1.1_1.js
@@ -3,12 +3,17 @@
 
 /*---
 es5id: 12.1.1_1
-description: Tests that the this-value is ignored in DateTimeFormat.
+description: >
+    Tests that the this-value is ignored in DateTimeFormat, if the this-value
+    isn't a DateTimeFormat instance.
 author: Norbert Lindenberg
 includes: [testIntl.js]
 ---*/
 
 testWithIntlConstructors(function (Constructor) {
+    if (Constructor === Intl.DateTimeFormat)
+        return true;
+
     var obj, newObj;
 
     // variant 1: use constructor in a "new" expression
diff --git a/test/intl402/NumberFormat/11.1.1_1.js b/test/intl402/NumberFormat/11.1.1_1.js
index 6e36af019b8662d6486c2340d6d1dd49b7d60a4b..035e74a10cf0b8dd3a9d6fd3b2d8f7f882ff7954 100644
--- a/test/intl402/NumberFormat/11.1.1_1.js
+++ b/test/intl402/NumberFormat/11.1.1_1.js
@@ -3,12 +3,17 @@
 
 /*---
 es5id: 11.1.1_1
-description: Tests that the this-value is ignored in NumberFormat.
+description: >
+    Tests that the this-value is ignored in NumberFormat, if the this-value
+    isn't a NumberFormat instance.
 author: Norbert Lindenberg
 includes: [testIntl.js]
 ---*/
 
 testWithIntlConstructors(function (Constructor) {
+    if (Constructor === Intl.NumberFormat)
+        return true;
+
     var obj, newObj;
 
     // variant 1: use constructor in a "new" expression