diff --git a/tests/exception.phpt b/tests/exception.phpt
index aec5cd3..aa3da98 100644
--- a/tests/exception.phpt
+++ b/tests/exception.phpt
@@ -19,7 +19,7 @@ try {
 ?>
 ===EOF===
 --EXPECTF--
-object(V8JsScriptException)#2 (11) {
+object(V8JsScriptException)#%d (11) {
   ["message":protected]=>
   string(75) "exception.js:1: ReferenceError: this_function_does_not_exist is not defined"
   ["string":"Exception":private]=>
diff --git a/tests/exception_propagation_2.phpt b/tests/exception_propagation_2.phpt
index 29496fe..06e75e3 100644
--- a/tests/exception_propagation_2.phpt
+++ b/tests/exception_propagation_2.phpt
@@ -33,7 +33,7 @@ try {
 ?>
 ===EOF===
 --EXPECTF--
-object(V8JsScriptException)#3 (11) {
+object(V8JsScriptException)#%d (11) {
   ["message":protected]=>
   string(49) "throw_0:1: ReferenceError: fooobar is not defined"
   ["string":"Exception":private]=>
diff --git a/tests/execute_flags.phpt b/tests/execute_flags.phpt
index 62640bf..642b3eb 100644
--- a/tests/execute_flags.phpt
+++ b/tests/execute_flags.phpt
@@ -20,8 +20,8 @@ try {
 }
 ?>
 ===EOF===
---EXPECT--
-object(V8Object)#2 (1) {
+--EXPECTF--
+object(V8Object)#%d (1) {
   ["hello"]=>
   string(5) "world"
 }
diff --git a/tests/execute_flags_args.phpt b/tests/execute_flags_args.phpt
index 6a25d2e..b839ee4 100644
--- a/tests/execute_flags_args.phpt
+++ b/tests/execute_flags_args.phpt
@@ -22,10 +22,10 @@ try {
 }
 ?>
 ===EOF===
---EXPECT--
+--EXPECTF--
 array(2) {
   [0]=>
-  object(V8Object)#3 (6) {
+  object(V8Object)#%d (6) {
     ["0"]=>
     string(1) "F"
     ["1"]=>
@@ -40,7 +40,7 @@ array(2) {
     string(1) "r"
   }
   [1]=>
-  object(V8Object)#4 (2) {
+  object(V8Object)#%d (2) {
     ["0"]=>
     string(3) "foo"
     ["1"]=>
diff --git a/tests/js-construct-protected-ctor.phpt b/tests/js-construct-protected-ctor.phpt
index 3256cd8..a132d06 100644
--- a/tests/js-construct-protected-ctor.phpt
+++ b/tests/js-construct-protected-ctor.phpt
@@ -42,7 +42,7 @@ try {
 ctor called (php)
 Hello John
 caught js exception
-object(V8JsScriptException)#3 (11) {
+object(V8JsScriptException)#%d (11) {
   ["message":protected]=>
   string(56) "ctor-test:4: Call to protected __construct() not allowed"
   ["string":"Exception":private]=>
diff --git a/tests/object_method_call.phpt b/tests/object_method_call.phpt
index d037ad1..b0b4eb7 100644
--- a/tests/object_method_call.phpt
+++ b/tests/object_method_call.phpt
@@ -71,7 +71,7 @@ try {
 
 ?>
 ===EOF===
---EXPECT--
+--EXPECTF--
 array(2) {
   [0]=>
   string(4) "arg1"
@@ -113,7 +113,7 @@ Mon, 08 Sep 1975 09:00:00 +0000
 string(3) "foo"
 array(3) {
   [0]=>
-  object(Testing)#2 (3) {
+  object(Testing)#%d (3) {
     ["foo"]=>
     string(8) "ORIGINAL"
     ["my_private":"Testing":private]=>
@@ -137,7 +137,7 @@ array(3) {
     [1]=>
     string(3) "bar"
     [2]=>
-    object(Testing)#2 (3) {
+    object(Testing)#%d (3) {
       ["foo"]=>
       string(8) "ORIGINAL"
       ["my_private":"Testing":private]=>
diff --git a/tests/object_prototype.phpt b/tests/object_prototype.phpt
index 469171f..44dbc5b 100644
--- a/tests/object_prototype.phpt
+++ b/tests/object_prototype.phpt
@@ -34,12 +34,12 @@ $a->test_two = new A();
 $a->executeString($js, 'foo');
 ?>
 ===EOF===
---EXPECT--
+--EXPECTF--
 array(2) {
   [0]=>
   string(6) "Foobar"
   [1]=>
-  object(V8Object)#4 (2) {
+  object(V8Object)#%d (2) {
     ["0"]=>
     string(3) "foo"
     ["1"]=>
@@ -50,7 +50,7 @@ array(2) {
   [0]=>
   string(6) "Foobar"
   [1]=>
-  object(V8Object)#4 (2) {
+  object(V8Object)#%d (2) {
     ["0"]=>
     string(3) "foo"
     ["1"]=>
@@ -61,7 +61,7 @@ array(2) {
   [0]=>
   string(5) "a,b,c"
   [1]=>
-  object(V8Object)#4 (2) {
+  object(V8Object)#%d (2) {
     ["0"]=>
     string(3) "foo"
     ["1"]=>
@@ -72,7 +72,7 @@ array(2) {
   [0]=>
   string(5) "a,b,c"
   [1]=>
-  object(V8Object)#4 (2) {
+  object(V8Object)#%d (2) {
     ["0"]=>
     string(3) "foo"
     ["1"]=>
diff --git a/tests/return_value.phpt b/tests/return_value.phpt
index 5ee036a..44f567a 100644
--- a/tests/return_value.phpt
+++ b/tests/return_value.phpt
@@ -41,9 +41,9 @@ var_dump($a->executeString("test(true);", "test8.js"));
 var_dump($a->executeString("test(false);", "test9.js"));
 ?>
 ===EOF===
---EXPECT--
+--EXPECTF--
 NULL
-object(Testing)#2 (3) {
+object(Testing)#%d (3) {
   ["foo"]=>
   string(8) "ORIGINAL"
   ["my_private":"Testing":private]=>