diff --git a/js/src/tests/ecma_5/Object/15.2.3.6-define-over-method.js b/js/src/tests/ecma_5/Object/15.2.3.6-define-over-method.js
index 43b3e4146a2a..1cc9e13e1489 100644
--- a/js/src/tests/ecma_5/Object/15.2.3.6-define-over-method.js
+++ b/js/src/tests/ecma_5/Object/15.2.3.6-define-over-method.js
@@ -4,7 +4,7 @@
 //-----------------------------------------------------------------------------
 var BUGNUMBER = 568786;
 var summary =
-  '"Assertion failure: !(attrs & (JSPROP_GETTER | JSPROP_SETTER))," with ' +
+  'Do not assert: !(attrs & (JSPROP_GETTER | JSPROP_SETTER)) with ' +
   'Object.defineProperty';
 
 print(BUGNUMBER + ": " + summary);
diff --git a/js/src/tests/js1_5/Regress/regress-478314.js b/js/src/tests/js1_5/Regress/regress-478314.js
index ec5a2f27fb90..7d94f44849f8 100644
--- a/js/src/tests/js1_5/Regress/regress-478314.js
+++ b/js/src/tests/js1_5/Regress/regress-478314.js
@@ -5,7 +5,7 @@
 
 //-----------------------------------------------------------------------------
 var BUGNUMBER = 478314;
-var summary = 'Do not assert: Assertion failed: "need a way to EOT now, since this is trace end": 0';
+var summary = 'Do not assert: "need a way to EOT now, since this is trace end": 0';
 var actual = '';
 var expect = '';
 
diff --git a/js/src/tests/js1_8/regress/regress-532491.js b/js/src/tests/js1_8/regress/regress-532491.js
index 3e5ab2d7e5bf..c5a07d371ef4 100644
--- a/js/src/tests/js1_8/regress/regress-532491.js
+++ b/js/src/tests/js1_8/regress/regress-532491.js
@@ -5,7 +5,7 @@
 
 //-----------------------------------------------------------------------------
 var BUGNUMBER = 466128;
-var summary = 'Assertion failure: staticLevel == script->staticLevel, at ../jsobj.cpp';
+var summary = 'Do not assert: staticLevel == script->staticLevel, at ../jsobj.cpp';
 var actual = '';
 var expect = '';