diff --git a/test/intl402/NumberFormat/prototype/format/11.3.2_TRF.js b/test/intl402/NumberFormat/prototype/format/11.3.2_TRF.js
index 340badc1de..7aeeb43f12 100644
--- a/test/intl402/NumberFormat/prototype/format/11.3.2_TRF.js
+++ b/test/intl402/NumberFormat/prototype/format/11.3.2_TRF.js
@@ -48,6 +48,7 @@ var testData = {
     "-0.0000000012344501": "-000.0",
     "123445.01": "123445.01",
     "-123445.01": "-123445.01",
+    // Ref tc39/ecma402#128
     "12344501000000000000000000000000000": "12344501000000000487815444678311936.0",
     "-12344501000000000000000000000000000": "-12344501000000000487815444678311936.0"
 };
diff --git a/test/intl402/NumberFormat/prototype/format/11.3.2_TRP.js b/test/intl402/NumberFormat/prototype/format/11.3.2_TRP.js
index 53e3a8d73b..b62702c94d 100644
--- a/test/intl402/NumberFormat/prototype/format/11.3.2_TRP.js
+++ b/test/intl402/NumberFormat/prototype/format/11.3.2_TRP.js
@@ -32,6 +32,7 @@ var testData = {
     "-123.45": "-123.45",
     "123.44499": "123.44",
     "-123.44499": "-123.44",
+    // Ref tc39/ecma402#128
     "123.44500": "123.44",
     "-123.44500": "-123.44",
     "123.44501": "123.45",