diff --git a/Zend/tests/enum/__sleep.phpt b/Zend/tests/enum/__sleep.phpt
index 4da08e6a4d3f2..d3345e39bd47a 100644
--- a/Zend/tests/enum/__sleep.phpt
+++ b/Zend/tests/enum/__sleep.phpt
@@ -13,4 +13,6 @@ enum Foo {
 
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Fatal error: Enum Foo cannot include magic method __sleep in %s on line %d
diff --git a/Zend/tests/enum/__wakeup.phpt b/Zend/tests/enum/__wakeup.phpt
index 8aea17ae53fd3..60d5971ab3580 100644
--- a/Zend/tests/enum/__wakeup.phpt
+++ b/Zend/tests/enum/__wakeup.phpt
@@ -13,4 +13,6 @@ enum Foo {
 
 ?>
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Fatal error: Enum Foo cannot include magic method __wakeup in %s on line %d
diff --git a/Zend/tests/lazy_objects/oss_fuzz_71446.phpt b/Zend/tests/lazy_objects/oss_fuzz_71446.phpt
index ae2db55c73fc1..6209e29885c96 100644
--- a/Zend/tests/lazy_objects/oss_fuzz_71446.phpt
+++ b/Zend/tests/lazy_objects/oss_fuzz_71446.phpt
@@ -20,3 +20,4 @@ $obj = $reflector->newLazyProxy(function() {
 serialize($obj);
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
diff --git a/Zend/tests/lazy_objects/serialize___sleep.phpt b/Zend/tests/lazy_objects/serialize___sleep.phpt
index d21f0fe09c97d..bdd34baf37691 100644
--- a/Zend/tests/lazy_objects/serialize___sleep.phpt
+++ b/Zend/tests/lazy_objects/serialize___sleep.phpt
@@ -36,6 +36,7 @@ try {
 
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 Init on serialize and successful initialization
 string(27) "O:1:"C":1:{s:4:"%0C%0b";i:1;}"
 Init on serialize and failed initialization
diff --git a/Zend/tests/lazy_objects/serialize___sleep_initializes.phpt b/Zend/tests/lazy_objects/serialize___sleep_initializes.phpt
index ec7657afc6916..e505272881b41 100644
--- a/Zend/tests/lazy_objects/serialize___sleep_initializes.phpt
+++ b/Zend/tests/lazy_objects/serialize___sleep_initializes.phpt
@@ -37,6 +37,7 @@ $obj = $reflector->newLazyProxy(function ($obj) {
 test('Proxy', $obj);
 
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 # Ghost:
 string(11) "initializer"
 string(24) "O:1:"C":1:{s:1:"a";i:1;}"
diff --git a/Zend/tests/lazy_objects/serialize___sleep_skip_flag.phpt b/Zend/tests/lazy_objects/serialize___sleep_skip_flag.phpt
index 4641fb2a49ac3..55a7aeb6dc2da 100644
--- a/Zend/tests/lazy_objects/serialize___sleep_skip_flag.phpt
+++ b/Zend/tests/lazy_objects/serialize___sleep_skip_flag.phpt
@@ -35,6 +35,7 @@ $obj = $reflector->newLazyProxy(function ($obj) {
 test('Proxy', $obj);
 
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 # Ghost:
 string(12) "O:1:"C":0:{}"
 object(C)#%d (0) {
diff --git a/Zend/tests/lazy_objects/serialize___sleep_skip_flag_may_initialize.phpt b/Zend/tests/lazy_objects/serialize___sleep_skip_flag_may_initialize.phpt
index ed909a875de47..ea0e75536e730 100644
--- a/Zend/tests/lazy_objects/serialize___sleep_skip_flag_may_initialize.phpt
+++ b/Zend/tests/lazy_objects/serialize___sleep_skip_flag_may_initialize.phpt
@@ -38,6 +38,7 @@ $obj = $reflector->newLazyProxy(function ($obj) {
 test('Proxy', $obj);
 
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 # Ghost:
 string(11) "initializer"
 int(1)
diff --git a/Zend/tests/serialize/bug34045.phpt b/Zend/tests/serialize/bug34045.phpt
index 61886cf354b67..14aa55fea52a3 100644
--- a/Zend/tests/serialize/bug34045.phpt
+++ b/Zend/tests/serialize/bug34045.phpt
@@ -24,5 +24,6 @@ $db_str = serialize($db);
 $db2 = unserialize($db_str);
 echo "ok\n";
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 ok
diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index eb2286b932959..ef058d39b67dc 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -9272,6 +9272,15 @@ static void zend_compile_class_decl(znode *result, zend_ast *ast, bool toplevel)
 		ce->ce_flags |= ZEND_ACC_TOP_LEVEL;
 	}
 
+	if (UNEXPECTED(zend_hash_exists(&ce->function_table, ZSTR_KNOWN(ZEND_STR_SLEEP)) && ce->__serialize == NULL)) {
+		zend_error(E_DEPRECATED, "The __sleep() serialization hook has been deprecated."
+			" Implement __serialize() instead (or in addition, if support for old PHP versions is necessary)");
+	}
+	if (UNEXPECTED(zend_hash_exists(&ce->function_table, ZSTR_KNOWN(ZEND_STR_WAKEUP)) && ce->__unserialize == NULL)) {
+		zend_error(E_DEPRECATED, "The __wakeup() serialization hook has been deprecated."
+			" Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary)");
+	}
+
 	/* We currently don't early-bind classes that implement interfaces or use traits */
 	if (!ce->num_interfaces && !ce->num_traits && !ce->num_hooked_prop_variance_checks
 #ifdef ZEND_OPCACHE_SHM_REATTACHMENT
diff --git a/ext/date/tests/bug62852_var2.phpt b/ext/date/tests/bug62852_var2.phpt
index 4749d2a9bb21f..99621b81a17d8 100644
--- a/ext/date/tests/bug62852_var2.phpt
+++ b/ext/date/tests/bug62852_var2.phpt
@@ -22,6 +22,8 @@ try {
 var_dump( $foo );
 ?>
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Fatal error: Uncaught Error: Invalid serialization data for DateTime object in %sbug62852_var2.php:%d
 Stack trace:
 #0 [internal function]: DateTime->__unserialize(Array)
diff --git a/ext/date/tests/bug62852_var3.phpt b/ext/date/tests/bug62852_var3.phpt
index 7049efcebd84f..52145fc6b1f12 100644
--- a/ext/date/tests/bug62852_var3.phpt
+++ b/ext/date/tests/bug62852_var3.phpt
@@ -22,6 +22,8 @@ try {
 var_dump( $foo );
 ?>
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Fatal error: Uncaught Error: Invalid serialization data for DateTime object in %sbug62852_var3.php:%d
 Stack trace:
 #0 [internal function]: DateTime->__unserialize(Array)
diff --git a/ext/dom/tests/gh8996.phpt b/ext/dom/tests/gh8996.phpt
index 62b7955bacf11..e3a567c2e17aa 100644
--- a/ext/dom/tests/gh8996.phpt
+++ b/ext/dom/tests/gh8996.phpt
@@ -80,6 +80,9 @@ echo "Serialized:\n-----------\n$serialized\n-----------\nRestored:\n-----------
 
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 === __sleep and __wakeup ===
 string(144) "O:34:"SerializableDomDocumentSleepWakeup":1:{s:43:"%0SerializableDomDocumentSleepWakeup%0xmlData";s:39:"<?xml version="1.0"?>
 <tag>value</tag>
diff --git a/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_class.phpt b/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_class.phpt
index 4d5db44ea91b4..f3100f24f1343 100644
--- a/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_class.phpt
+++ b/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_class.phpt
@@ -110,6 +110,10 @@ $db = MySQLPDOTest::factory();
 $db->exec('DROP TABLE IF EXISTS test_stmt_fetch_class');
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Deprecated: %s implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 Creating an object, serializing it and writing it to DB...
 myclass::singleton(Creating object)
diff --git a/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_serialize.phpt b/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_serialize.phpt
index 8aaf65f52d9ea..f55edc36c6445 100644
--- a/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_serialize.phpt
+++ b/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_serialize.phpt
@@ -107,6 +107,10 @@ $db = MySQLPDOTest::factory();
 $db->exec('DROP TABLE IF EXISTS test_stmt_fetch_serialize');
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Deprecated: %s implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 Creating an object, serializing it and writing it to DB...
 myclass::singleton(Creating object)
diff --git a/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_serialize_fetch_class.phpt b/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_serialize_fetch_class.phpt
index f2f6c89ad3897..453345a86ed79 100644
--- a/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_serialize_fetch_class.phpt
+++ b/ext/pdo_mysql/tests/pdo_mysql_stmt_fetch_serialize_fetch_class.phpt
@@ -110,6 +110,10 @@ $db = MySQLPDOTest::factory();
 $db->exec('DROP TABLE IF EXISTS test_stmt_fetchserialize_fetch_class');
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Deprecated: %s implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 Creating an object, serializing it and writing it to DB...
 myclass::singleton(Creating object)
diff --git a/ext/phar/tests/phar_metadata_write3.phpt b/ext/phar/tests/phar_metadata_write3.phpt
index 304ed65b46e9f..2cd87f3983f1c 100644
--- a/ext/phar/tests/phar_metadata_write3.phpt
+++ b/ext/phar/tests/phar_metadata_write3.phpt
@@ -58,6 +58,7 @@ unlink(__DIR__ . '/' . basename(__FILE__, '.clean.php') . '.phar.php');
 unlink(__DIR__ . '/' . basename(__FILE__, '.clean.php') . '.phar.php.copy.php');
 ?>
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 Reading file contents through stream wrapper
 string(18) "contents of file a"
 Original metadata
diff --git a/ext/phar/tests/phar_metadata_write4.phpt b/ext/phar/tests/phar_metadata_write4.phpt
index ad9f4d47d91c6..347882682f532 100644
--- a/ext/phar/tests/phar_metadata_write4.phpt
+++ b/ext/phar/tests/phar_metadata_write4.phpt
@@ -68,6 +68,9 @@ unlink(__DIR__ . '/' . basename(__FILE__, '.clean.php') . '.phar.php');
 unlink(__DIR__ . '/' . basename(__FILE__, '.clean.php') . '.phar.php.copy.php');
 ?>
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 In __destruct 1
 string(1) "a"
 Loading metadata for 'a' without allowed_classes
diff --git a/ext/session/tests/bug53141.phpt b/ext/session/tests/bug53141.phpt
index 849a358760400..81ce8e3bd0a89 100644
--- a/ext/session/tests/bug53141.phpt
+++ b/ext/session/tests/bug53141.phpt
@@ -13,10 +13,10 @@ spl_autoload_register(function ($class) {
 
 class Foo
 {
-    function __sleep()
+    function __serialize()
     {
         new Bar;
-        return array();
+        return [];
     }
 }
 
diff --git a/ext/spl/tests/SplObjectStorage/bug70365.phpt b/ext/spl/tests/SplObjectStorage/bug70365.phpt
index 55ff58c9e9122..564814646aa30 100644
--- a/ext/spl/tests/SplObjectStorage/bug70365.phpt
+++ b/ext/spl/tests/SplObjectStorage/bug70365.phpt
@@ -34,6 +34,7 @@ function ptr2str($ptr)
 }
 ?>
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 array(5) {
   [0]=>
   int(1)
diff --git a/ext/spl/tests/bug70366.phpt b/ext/spl/tests/bug70366.phpt
index d3d3317bff370..9277198508138 100644
--- a/ext/spl/tests/bug70366.phpt
+++ b/ext/spl/tests/bug70366.phpt
@@ -34,6 +34,7 @@ function ptr2str($ptr)
 }
 ?>
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 array(5) {
   [0]=>
   int(1)
diff --git a/ext/standard/tests/serialize/001.phpt b/ext/standard/tests/serialize/001.phpt
index f2ac0340cf078..9e6b50e0d5dd0 100644
--- a/ext/standard/tests/serialize/001.phpt
+++ b/ext/standard/tests/serialize/001.phpt
@@ -1,5 +1,5 @@
 --TEST--
-serialize()/unserialize()/var_dump()
+serialize()/unserialize()/var_dump() using __sleep() and __wakeup()
 --INI--
 serialize_precision=100
 --FILE--
@@ -78,6 +78,9 @@ $a = unserialize($data);
 var_dump($a);
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 N;
 b:1;
 b:0;
diff --git a/ext/standard/tests/serialize/005.phpt b/ext/standard/tests/serialize/005.phpt
index 333c09525883c..bc285aa8ddae1 100644
--- a/ext/standard/tests/serialize/005.phpt
+++ b/ext/standard/tests/serialize/005.phpt
@@ -128,6 +128,14 @@ echo "===AutoNA===\n";
 var_dump(unserialize('O:22:"autoload_not_available":0:{}'));
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Deprecated: %s implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 ===O1===
 TestOld::__sleep()
diff --git a/ext/standard/tests/serialize/__serialize_004.phpt b/ext/standard/tests/serialize/__serialize_004.phpt
index 66db8bf5044be..b410a75619c58 100644
--- a/ext/standard/tests/serialize/__serialize_004.phpt
+++ b/ext/standard/tests/serialize/__serialize_004.phpt
@@ -38,7 +38,8 @@ var_dump($s = serialize($obj));
 var_dump(unserialize($s));
 
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 string(126) "O:6:"Wakeup":1:{s:4:"data";a:1:{i:0;O:11:"Unserialize":1:{i:0;O:6:"Wakeup":1:{s:4:"data";a:1:{i:0;O:11:"Unserialize":0:{}}}}}}"
 __unserialize() called
 array(0) {
diff --git a/ext/standard/tests/serialize/bug14293.phpt b/ext/standard/tests/serialize/bug14293.phpt
index c52ced3d0f3d4..664542255b713 100644
--- a/ext/standard/tests/serialize/bug14293.phpt
+++ b/ext/standard/tests/serialize/bug14293.phpt
@@ -26,6 +26,7 @@ var_dump($t);
 
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 __sleep called
 
 Warning: serialize(): "b" returned as member variable from __sleep() but does not exist in %s on line %d
diff --git a/ext/standard/tests/serialize/bug21957.phpt b/ext/standard/tests/serialize/bug21957.phpt
index 9d761a6699c96..0b328daa5995f 100644
--- a/ext/standard/tests/serialize/bug21957.phpt
+++ b/ext/standard/tests/serialize/bug21957.phpt
@@ -28,7 +28,8 @@ echo $s . "\n";
 
 var_dump(unserialize($s));
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 array(2) {
   ["one"]=>
   string(3) "ABC"
diff --git a/ext/standard/tests/serialize/bug35895.phpt b/ext/standard/tests/serialize/bug35895.phpt
index de7ff6d3e1a4f..729a00d725976 100644
--- a/ext/standard/tests/serialize/bug35895.phpt
+++ b/ext/standard/tests/serialize/bug35895.phpt
@@ -21,4 +21,8 @@ serialize($obj);
 
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Warning: serialize(): "parents" returned as member variable from __sleep() but does not exist in %s on line %d
diff --git a/ext/standard/tests/serialize/bug64354_2.phpt b/ext/standard/tests/serialize/bug64354_2.phpt
index 675305132157e..8245ea9653f17 100644
--- a/ext/standard/tests/serialize/bug64354_2.phpt
+++ b/ext/standard/tests/serialize/bug64354_2.phpt
@@ -20,5 +20,6 @@ try {
     var_dump($e->getMessage());
 }
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 string(6) "Failed"
diff --git a/ext/standard/tests/serialize/bug64354_3.phpt b/ext/standard/tests/serialize/bug64354_3.phpt
index e3832e653bbfb..9bc031f8ecc9e 100644
--- a/ext/standard/tests/serialize/bug64354_3.phpt
+++ b/ext/standard/tests/serialize/bug64354_3.phpt
@@ -26,5 +26,7 @@ try {
 }
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Deprecated: %s implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 string(6) "Failed"
diff --git a/ext/standard/tests/serialize/bug65806.phpt b/ext/standard/tests/serialize/bug65806.phpt
index 166b694442b78..1924d366e0d87 100644
--- a/ext/standard/tests/serialize/bug65806.phpt
+++ b/ext/standard/tests/serialize/bug65806.phpt
@@ -73,7 +73,10 @@ function check(myObjC $obj) {
     return 'successful';
 }
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 SCRIPT START
 check successful
 start serialize/unserialize
diff --git a/ext/standard/tests/serialize/bug68976.phpt b/ext/standard/tests/serialize/bug68976.phpt
index 514bd8b453fda..c0586e0483913 100644
--- a/ext/standard/tests/serialize/bug68976.phpt
+++ b/ext/standard/tests/serialize/bug68976.phpt
@@ -25,7 +25,8 @@ for($i = 0; $i < 5; $i++) {
 
 var_dump($data);
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 array(2) {
   [0]=>
   object(evilClass)#1 (0) {
diff --git a/ext/standard/tests/serialize/bug69210.phpt b/ext/standard/tests/serialize/bug69210.phpt
index 41cc8f55f9a5d..619f0fb333ace 100644
--- a/ext/standard/tests/serialize/bug69210.phpt
+++ b/ext/standard/tests/serialize/bug69210.phpt
@@ -34,7 +34,10 @@ echo $si . "\n";
 var_dump(unserialize($ss));
 var_dump(unserialize($si));
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 O:10:"testString":1:{s:1:"a";b:1;}
 O:11:"testInteger":1:{s:1:"a";b:1;}
 object(testString)#3 (1) {
diff --git a/ext/standard/tests/serialize/bug69425.phpt b/ext/standard/tests/serialize/bug69425.phpt
index 1bc79c0387c8c..4803c7f2b7f33 100644
--- a/ext/standard/tests/serialize/bug69425.phpt
+++ b/ext/standard/tests/serialize/bug69425.phpt
@@ -23,6 +23,7 @@ var_dump($data);
 
 ?>
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 int(1)
 array(2) {
   [0]=>
diff --git a/ext/standard/tests/serialize/bug70172_2.phpt b/ext/standard/tests/serialize/bug70172_2.phpt
index 27e77951fe37c..f2184bb03e688 100644
--- a/ext/standard/tests/serialize/bug70172_2.phpt
+++ b/ext/standard/tests/serialize/bug70172_2.phpt
@@ -48,7 +48,9 @@ function ptr2str($ptr)
 }
 ?>
 --EXPECTF--
-Deprecated: %s implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: obj implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 array(2) {
   [0]=>
   object(obj2)#%d (1) {
diff --git a/ext/standard/tests/serialize/bug70513.phpt b/ext/standard/tests/serialize/bug70513.phpt
index 9a93a3359b678..d96a9dbb8a7e1 100644
--- a/ext/standard/tests/serialize/bug70513.phpt
+++ b/ext/standard/tests/serialize/bug70513.phpt
@@ -26,7 +26,8 @@ var_dump($x);
 var_dump($obj);
 
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 array(1) {
   [0]=>
   int(1)
diff --git a/ext/standard/tests/serialize/bug71995.phpt b/ext/standard/tests/serialize/bug71995.phpt
index 9d51ace750e13..43045aa26d3c6 100644
--- a/ext/standard/tests/serialize/bug71995.phpt
+++ b/ext/standard/tests/serialize/bug71995.phpt
@@ -18,6 +18,8 @@ var_dump($s);
 var_dump(unserialize($s));
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Warning: serialize(): "b" is returned from __sleep() multiple times in %s on line %d
 string(39) "O:1:"A":1:{s:1:"b";O:8:"stdClass":0:{}}"
 object(A)#%d (1) {
diff --git a/ext/standard/tests/serialize/bug72663.phpt b/ext/standard/tests/serialize/bug72663.phpt
index ce767973e97f1..43c668d4ca98b 100644
--- a/ext/standard/tests/serialize/bug72663.phpt
+++ b/ext/standard/tests/serialize/bug72663.phpt
@@ -49,6 +49,10 @@ try {
 
 ?>
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Warning: unserialize(): Error at offset 17 of 24 bytes in %s on line %d
 bool(false)
 
diff --git a/ext/standard/tests/serialize/bug72731.phpt b/ext/standard/tests/serialize/bug72731.phpt
index 9489928cfb128..13e1c04739b5e 100644
--- a/ext/standard/tests/serialize/bug72731.phpt
+++ b/ext/standard/tests/serialize/bug72731.phpt
@@ -15,4 +15,5 @@ var_dump(unserialize($poc));
 
 ?>
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 %s(73588229205)
diff --git a/ext/standard/tests/serialize/bug73154.phpt b/ext/standard/tests/serialize/bug73154.phpt
index 8d0f188bf7f34..d0142cd20ba90 100644
--- a/ext/standard/tests/serialize/bug73154.phpt
+++ b/ext/standard/tests/serialize/bug73154.phpt
@@ -12,5 +12,6 @@ class a {
 $s = 'a:1:{i:0;O:1:"a":1:{s:1:"a";R:2;}}';
 var_dump(serialize(unserialize($s)));
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 string(22) "a:1:{i:0;O:1:"a":0:{}}"
diff --git a/ext/standard/tests/serialize/bug79526.phpt b/ext/standard/tests/serialize/bug79526.phpt
index 440c18772d53d..a41d681c7786d 100644
--- a/ext/standard/tests/serialize/bug79526.phpt
+++ b/ext/standard/tests/serialize/bug79526.phpt
@@ -24,6 +24,10 @@ serialize(new B());
 ?>
 Done
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Warning: serialize(): A::__sleep() should return an array only containing the names of instance-variables to serialize in %s on line %d
 
 Warning: serialize(): B::__sleep() should return an array only containing the names of instance-variables to serialize in %s on line %d
diff --git a/ext/standard/tests/serialize/bug81163.phpt b/ext/standard/tests/serialize/bug81163.phpt
index 855fc1c953ed2..4287c5aa5a560 100644
--- a/ext/standard/tests/serialize/bug81163.phpt
+++ b/ext/standard/tests/serialize/bug81163.phpt
@@ -18,4 +18,6 @@ class bar extends foo
 serialize(new bar());
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Warning: serialize(): bar::__sleep() should return an array only containing the names of instance-variables to serialize in %s on line %d
diff --git a/ext/standard/tests/serialize/sleep_deref.phpt b/ext/standard/tests/serialize/sleep_deref.phpt
index 36777db0a358c..3ffca1246b16f 100644
--- a/ext/standard/tests/serialize/sleep_deref.phpt
+++ b/ext/standard/tests/serialize/sleep_deref.phpt
@@ -14,5 +14,6 @@ class Test {
 var_dump(serialize(new Test));
 
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 string(28) "O:4:"Test":1:{s:1:"x";i:42;}"
diff --git a/ext/standard/tests/serialize/sleep_mangled_name_clash.phpt b/ext/standard/tests/serialize/sleep_mangled_name_clash.phpt
index eef5949abbe57..b23cd304339fb 100644
--- a/ext/standard/tests/serialize/sleep_mangled_name_clash.phpt
+++ b/ext/standard/tests/serialize/sleep_mangled_name_clash.phpt
@@ -12,5 +12,7 @@ $s = serialize(new Test);
 var_dump(str_replace("\0", '\0', $s));
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Warning: serialize(): "priv" is returned from __sleep() multiple times in %s on line %d
 string(37) "O:4:"Test":1:{s:10:"\0Test\0priv";N;}"
diff --git a/ext/standard/tests/serialize/sleep_undefined_declared_properties.phpt b/ext/standard/tests/serialize/sleep_undefined_declared_properties.phpt
index 3c7f802e670b6..31e4f4ad2bb82 100644
--- a/ext/standard/tests/serialize/sleep_undefined_declared_properties.phpt
+++ b/ext/standard/tests/serialize/sleep_undefined_declared_properties.phpt
@@ -21,6 +21,8 @@ var_dump(serialize(new Test));
 
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Warning: serialize(): "pub" returned as member variable from __sleep() but does not exist in %s on line %d
 
 Warning: serialize(): "prot" returned as member variable from __sleep() but does not exist in %s on line %d
diff --git a/ext/standard/tests/serialize/sleep_uninitialized_typed_prop.phpt b/ext/standard/tests/serialize/sleep_uninitialized_typed_prop.phpt
index ebef92ca188ae..0b1671a34a9c8 100644
--- a/ext/standard/tests/serialize/sleep_uninitialized_typed_prop.phpt
+++ b/ext/standard/tests/serialize/sleep_uninitialized_typed_prop.phpt
@@ -32,7 +32,8 @@ var_dump(unserialize(serialize($t)) == $t);
 
 var_dump($t);
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 string(15) "O:4:"Test":0:{}"
 bool(true)
 bool(true)
diff --git a/ext/standard/tests/strings/bug72663_3.phpt b/ext/standard/tests/strings/bug72663_3.phpt
index bcec2b182a1da..fae1c0b842bb7 100644
--- a/ext/standard/tests/strings/bug72663_3.phpt
+++ b/ext/standard/tests/strings/bug72663_3.phpt
@@ -14,5 +14,7 @@ unserialize($poc);
 ?>
 DONE
 --EXPECTF--
+Deprecated: The __wakeup() serialization hook has been deprecated. Implement __unserialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Warning: unserialize(): Error at offset 50 of 50 bytes in %s on line %d
 DONE
diff --git a/tests/classes/bug26737.phpt b/tests/classes/bug26737.phpt
index ea7ae1ed9a1cc..515600ad8403c 100644
--- a/tests/classes/bug26737.phpt
+++ b/tests/classes/bug26737.phpt
@@ -18,5 +18,7 @@ $data = serialize($foo);
 var_dump(str_replace("\0", '\0', $data));
 ?>
 --EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
+
 Warning: serialize(): "no_such" returned as member variable from __sleep() but does not exist in %s on line %d
 string(114) "O:3:"foo":3:{s:12:"\0foo\0private";s:7:"private";s:12:"\0*\0protected";s:9:"protected";s:6:"public";s:6:"public";}"
diff --git a/tests/classes/private_members_serialization.phpt b/tests/classes/private_members_serialization.phpt
index 1b04b6f59c723..eaa84d94a5451 100644
--- a/tests/classes/private_members_serialization.phpt
+++ b/tests/classes/private_members_serialization.phpt
@@ -19,5 +19,6 @@ class bar extends foo
 
 var_dump(str_replace("\0", '\0', serialize(new bar())));
 ?>
---EXPECT--
+--EXPECTF--
+Deprecated: The __sleep() serialization hook has been deprecated. Implement __serialize() instead (or in addition, if support for old PHP versions is necessary) in %s on line %d
 string(114) "O:3:"bar":3:{s:12:"\0foo\0private";s:7:"private";s:12:"\0*\0protected";s:9:"protected";s:6:"public";s:6:"public";}"