diff --git a/tests/core/classes/abstract.phpt b/tests/core/classes/abstract.phpt
deleted file mode 100644
index fec3f4b3..00000000
--- a/tests/core/classes/abstract.phpt
+++ /dev/null
@@ -1,34 +0,0 @@
---TEST--
-ZE2 An abstract method may not be called
---FILE--
-<?php
-
-abstract class fail {
-    abstract function show();
-}
-
-class pass extends fail {
-    function show() {
-        echo "Call to function show()\n";
-    }
-    function error() {
-        parent::show();
-    }
-}
-
-function main() {
-    $t = new pass();
-    $t->show();
-    $t->error();
-
-    echo "Done\n"; // shouldn't be displayed
-}
-?>
---EXPECTF--
-Call to function show()
-
-Fatal error: Uncaught Error: Cannot call abstract method fail::show() in %s
-Stack trace:
-#0 Unknown(0) : %s
-#1 {main}
-  thrown in Unknown(0) : %s
diff --git a/tests/core/classes/class_abstract.phpt b/tests/core/classes/class_abstract.phpt
deleted file mode 100644
index e652019d..00000000
--- a/tests/core/classes/class_abstract.phpt
+++ /dev/null
@@ -1,32 +0,0 @@
---TEST--
-ZE2 An abstract class cannot be instantiated
---FILE--
-<?php
-
-abstract class base {
-    function show() {
-        echo "base\n";
-    }
-}
-
-class derived extends base {
-}
-
-function main() {
-    $t = new derived();
-    $t->show();
-
-    $t = new base();
-    $t->show();
-
-    echo "Done\n"; // shouldn't be displayed
-}
-?>
---EXPECTF--
-base
-
-Fatal error: Uncaught Error: Cannot instantiate abstract class base in %s:%d
-Stack trace:
-#0 Unknown(0) : %s
-#1 {main}
-  thrown in %s on line %d
diff --git a/tests/core/classes/clone_004.phpt b/tests/core/classes/clone_004.phpt
deleted file mode 100644
index cdb4581c..00000000
--- a/tests/core/classes/clone_004.phpt
+++ /dev/null
@@ -1,83 +0,0 @@
---TEST--
-ZE2 object cloning, 4
---FILE--
-<?php
-abstract class base {
-  public $a = 'base';
-
-  // disallow cloning
-  private function __clone() {}
-}
-
-class test extends base {
-  public $b = 'test';
-
-  // re-enable cloning
-  public function __clone() {}
-
-  public function show() {
-    var_dump($this);
-  }
-}
-function main() {
-    echo "Original\n";
-    $o1 = new test;
-    $o1->a = array(1,2);
-    $o1->b = array(3,4);
-    $o1->show();
-
-    echo "Clone\n";
-    $o2 = clone $o1;
-    $o2->show();
-
-    echo "Modify\n";
-    $o2->a = 5;
-    $o2->b = 6;
-    $o2->show();
-
-    echo "Done\n";
-}
-?>
---EXPECT--
-Original
-object(test)#1 (2) {
-  ["a"]=>
-  array(2) {
-    [0]=>
-    int(1)
-    [1]=>
-    int(2)
-  }
-  ["b"]=>
-  array(2) {
-    [0]=>
-    int(3)
-    [1]=>
-    int(4)
-  }
-}
-Clone
-object(test)#2 (2) {
-  ["a"]=>
-  array(2) {
-    [0]=>
-    int(1)
-    [1]=>
-    int(2)
-  }
-  ["b"]=>
-  array(2) {
-    [0]=>
-    int(3)
-    [1]=>
-    int(4)
-  }
-}
-Modify
-object(test)#2 (2) {
-  ["a"]=>
-  int(5)
-  ["b"]=>
-  int(6)
-}
-Done
diff --git a/tests/core/classes/constants_basic_002.phpt b/tests/core/classes/constants_basic_002.phpt
index bbe33f8d..3b8dffcf 100644
--- a/tests/core/classes/constants_basic_002.phpt
+++ b/tests/core/classes/constants_basic_002.phpt
@@ -24,8 +24,6 @@ Read class constant.
 string(5) "hello"
 
 Fail to read class constant from instance.
-
-Warning: Undefined property: aclass::$myConst in %s on line %d
 NULL
 
 Class constant not visible in object var_dump.
diff --git a/tests/core/classes/ctor_dtor.phpt b/tests/core/classes/ctor_dtor.phpt
index bcd73430..9d40e52e 100644
--- a/tests/core/classes/ctor_dtor.phpt
+++ b/tests/core/classes/ctor_dtor.phpt
@@ -24,7 +24,8 @@ function main() {
     $t = new early();
     $t->__construct();
     unset($t);
-    $t = new late();
+
+    $t2 = new late();
     //unset($t); delay to end of script
 
     echo "Done\n";