diff --git a/tests/checkstring.phpt b/tests/checkstring.phpt
index b5f2790..9d6ce0e 100644
--- a/tests/checkstring.phpt
+++ b/tests/checkstring.phpt
@@ -20,5 +20,5 @@ Deprecated: Function V8Js::checkString() is deprecated in %s on line %d
 bool(true)
 
 Deprecated: Function V8Js::checkString() is deprecated in %s on line %d
-string(60) "V8Js::checkString():1: SyntaxError: Unexpected token ILLEGAL"
+string(%d) "V8Js::checkString():1: SyntaxError: %s"
 ===EOF===
diff --git a/tests/checkstring_compile.phpt b/tests/checkstring_compile.phpt
index 2c9e188..c571e06 100644
--- a/tests/checkstring_compile.phpt
+++ b/tests/checkstring_compile.phpt
@@ -17,5 +17,5 @@ try {
 ===EOF===
 --EXPECTF--
 resource(%d) of type (V8Js script)
-string(62) "V8Js::compileString():1: SyntaxError: Unexpected token ILLEGAL"
+string(%d) "V8Js::compileString():1: SyntaxError: %s"
 ===EOF===