diff --git a/hphp/test/vm/cnvBool.php b/hphp/test/vm/cnvBool.php
new file mode 100644
index 000000000..0ea829d1a
--- /dev/null
+++ b/hphp/test/vm/cnvBool.php
@@ -0,0 +1,56 @@
+<?php
+
+function foo($v) {
+  return (bool)$v;
+}
+
+var_dump(foo(null));
+var_dump(foo(true));
+var_dump(foo(1));
+var_dump(foo(1.1));
+var_dump(foo("true"));
+var_dump(foo(array(123)));
+
+class C{}
+
+function bar($i) {
+  $v1 = "undefined";
+  $v2 = "undefined";
+  $v3 = "undefined";
+  $v4 = "undefined";
+  $v5 = "undefined";
+  $v6 = "undefined";
+  $v7 = "undefined";
+  $v8 = "undefined";
+  $v9 = "undefined";
+  $v10 = "undefined";
+  $v11 = "undefined";
+  if ($i >= 1) {
+    $v1 = null;
+    $v2 = false;
+    $v3 = true;
+    $v4 = 0;
+    $v5 = 1;
+    $v6 = 0.0;
+    $v7 = 1.1;
+    $v8 = "false";
+    $v9 = new C();
+    $v10 = array();
+    $v11 = array(1);
+  }
+  var_dump((bool)$v1);
+  var_dump((bool)$v2);
+  var_dump((bool)$v3);
+  var_dump((bool)$v4);
+  var_dump((bool)$v5);
+  var_dump((bool)$v6);
+  var_dump((bool)$v7);
+  var_dump((bool)$v8);
+  var_dump((bool)$v9);
+  var_dump((bool)$v10);
+  var_dump((bool)$v11);
+}
+
+bar(1);
+
+?>
diff --git a/hphp/test/vm/cnvBool.php.exp b/hphp/test/vm/cnvBool.php.exp
new file mode 100644
index 000000000..a7dc30651
--- /dev/null
+++ b/hphp/test/vm/cnvBool.php.exp
@@ -0,0 +1,17 @@
+bool(false)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(false)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+bool(false)
+bool(true)
+bool(true)
+bool(true)
+bool(false)
+bool(true)
diff --git a/hphp/test/vm/cnvDbl.php b/hphp/test/vm/cnvDbl.php
new file mode 100644
index 000000000..ff4f9f3c5
--- /dev/null
+++ b/hphp/test/vm/cnvDbl.php
@@ -0,0 +1,55 @@
+<?php
+
+function foo($v) {
+  return (double)$v;
+}
+
+var_dump(foo(null));
+var_dump(foo(true));
+var_dump(foo(1));
+var_dump(foo(9007199254740992));
+var_dump(foo(1.1));
+var_dump(foo("abc"));
+var_dump(foo(array(123)));
+class C { public $foo = "bar"; }
+var_dump(foo(new C));
+
+function bar($i) {
+  $v1 = "undefined";
+  $v2 = "undefined";
+  $v3 = "undefined";
+  $v4 = "undefined";
+  $v5 = "undefined";
+  $v6 = "undefined";
+  $v7 = "undefined";
+  $v8 = "undefined";
+  $v9 = "undefined";
+  $v10 = "undefined";
+  $v11 = "undefined";
+  if ($i >= 1) {
+    $v1 = null;
+    $v2 = false;
+    $v3 = true;
+    $v4 = 0;
+    $v5 = "1";
+    $v6 = 0.0;
+    $v7 = "1.1";
+    $v8 = "abc";
+    $v9 = new C;
+    $v10 = array();
+    $v11 = array(123);
+  }
+  var_dump((double)$v1);
+  var_dump((double)$v2);
+  var_dump((double)$v3);
+  var_dump((double)$v4);
+  var_dump((double)$v5);
+  var_dump((double)$v6);
+  var_dump((double)$v7);
+  var_dump((double)$v8);
+  var_dump((double)$v9);
+  var_dump((double)$v10);
+  var_dump((double)$v11);
+}
+
+bar(1);
diff --git a/hphp/test/vm/cnvDbl.php.exp b/hphp/test/vm/cnvDbl.php.exp
new file mode 100644
index 000000000..8c0d9a60b
--- /dev/null
+++ b/hphp/test/vm/cnvDbl.php.exp
@@ -0,0 +1,21 @@
+float(0)
+float(1)
+float(1)
+float(9.007199254741E+15)
+float(1.1)
+float(0)
+float(1)
+HipHop Notice:  Object of class C could not be converted to int in hphp/test/vm/cnvDbl.php on line 4
+float(1)
+float(0)
+float(0)
+float(1)
+float(0)
+float(1)
+float(0)
+float(1.1)
+float(0)
+HipHop Notice:  Object of class C could not be converted to int in hphp/test/vm/cnvDbl.php on line 50
+float(1)
+float(0)
+float(1)
diff --git a/hphp/test/vm/cnvDbl.php.filter b/hphp/test/vm/cnvDbl.php.filter
new file mode 120000
index 000000000..7b75548ca
--- /dev/null
+++ b/hphp/test/vm/cnvDbl.php.filter
@@ -0,0 +1 @@
+filepath.filter
\ No newline at end of file
diff --git a/hphp/test/vm/cnvInt.php b/hphp/test/vm/cnvInt.php
new file mode 100644
index 000000000..c59d9c60e
--- /dev/null
+++ b/hphp/test/vm/cnvInt.php
@@ -0,0 +1,55 @@
+<?php
+
+function foo($v) {
+  return (int)$v;
+}
+
+var_dump(foo(null));
+var_dump(foo(true));
+var_dump(foo(1));
+var_dump(foo(9007199254740992));
+var_dump(foo(1.1));
+var_dump(foo("abc"));
+var_dump(foo(array(123)));
+class C { public $foo = "bar"; }
+var_dump(foo(new C));
+
+function bar($i) {
+  $v1 = "undefined";
+  $v2 = "undefined";
+  $v3 = "undefined";
+  $v4 = "undefined";
+  $v5 = "undefined";
+  $v6 = "undefined";
+  $v7 = "undefined";
+  $v8 = "undefined";
+  $v9 = "undefined";
+  $v10 = "undefined";
+  $v11 = "undefined";
+  if ($i >= 1) {
+    $v1 = null;
+    $v2 = false;
+    $v3 = true;
+    $v4 = 0;
+    $v5 = "1";
+    $v6 = 0.0;
+    $v7 = "1.1";
+    $v8 = "abc";
+    $v9 = new C;
+    $v10 = array();
+    $v11 = array(123);
+  }
+  var_dump((int)$v1);
+  var_dump((int)$v2);
+  var_dump((int)$v3);
+  var_dump((int)$v4);
+  var_dump((int)$v5);
+  var_dump((int)$v6);
+  var_dump((int)$v7);
+  var_dump((int)$v8);
+  var_dump((int)$v9);
+  var_dump((int)$v10);
+  var_dump((int)$v11);
+}
+
+bar(1);
diff --git a/hphp/test/vm/cnvInt.php.exp b/hphp/test/vm/cnvInt.php.exp
new file mode 100644
index 000000000..ec8ef0fc6
--- /dev/null
+++ b/hphp/test/vm/cnvInt.php.exp
@@ -0,0 +1,21 @@
+int(0)
+int(1)
+int(1)
+int(9007199254740992)
+int(1)
+int(0)
+int(1)
+HipHop Notice:  Object of class C could not be converted to int in hphp/test/vm/cnvInt.php on line 4
+int(1)
+int(0)
+int(0)
+int(1)
+int(0)
+int(1)
+int(0)
+int(1)
+int(0)
+HipHop Notice:  Object of class C could not be converted to int in hphp/test/vm/cnvInt.php on line 50
+int(1)
+int(0)
+int(1)
diff --git a/hphp/test/vm/cnvInt.php.filter b/hphp/test/vm/cnvInt.php.filter
new file mode 120000
index 000000000..7b75548ca
--- /dev/null
+++ b/hphp/test/vm/cnvInt.php.filter
@@ -0,0 +1 @@
+filepath.filter
\ No newline at end of file
diff --git a/hphp/test/vm/cnvObj.php b/hphp/test/vm/cnvObj.php
new file mode 100644
index 000000000..9e718ff8b
--- /dev/null
+++ b/hphp/test/vm/cnvObj.php
@@ -0,0 +1,31 @@
+<?php
+
+function foo($v) {
+  return (object)$v;
+}
+
+var_dump(foo(null));
+var_dump(foo(false));
+var_dump(foo(true));
+var_dump(foo(1));
+var_dump(foo(1.1));
+var_dump(foo("abc"));
+var_dump(foo(array(123)));
+class C { }
+var_dump(foo(new C));
+
+function bar($v) {
+  $nonStaticStr = (string)$v;
+  return (object)$nonStaticStr;
+}
+var_dump(bar(1));
+
+function candy($i) {
+  $v1 = "undefined";
+  if ($i >= 1) {
+    $v1 = null;
+  }
+  var_dump((object)$v1);
+}
+
+candy(1);
\ No newline at end of file
diff --git a/hphp/test/vm/cnvObj.php.exp b/hphp/test/vm/cnvObj.php.exp
new file mode 100644
index 000000000..dc00238dc
--- /dev/null
+++ b/hphp/test/vm/cnvObj.php.exp
@@ -0,0 +1,34 @@
+object(stdClass)#1 (0) {
+}
+object(stdClass)#1 (1) {
+  ["scalar"]=>
+  bool(false)
+}
+object(stdClass)#1 (1) {
+  ["scalar"]=>
+  bool(true)
+}
+object(stdClass)#1 (1) {
+  ["scalar"]=>
+  int(1)
+}
+object(stdClass)#1 (1) {
+  ["scalar"]=>
+  float(1.1)
+}
+object(stdClass)#1 (1) {
+  ["scalar"]=>
+  string(3) "abc"
+}
+object(stdClass)#1 (1) {
+  [0]=>
+  int(123)
+}
+object(C)#1 (0) {
+}
+object(stdClass)#1 (1) {
+  ["scalar"]=>
+  string(1) "1"
+}
+object(stdClass)#1 (0) {
+}
diff --git a/hphp/test/vm/cnvStr.php b/hphp/test/vm/cnvStr.php
new file mode 100644
index 000000000..75bd0299b
--- /dev/null
+++ b/hphp/test/vm/cnvStr.php
@@ -0,0 +1,58 @@
+<?php
+
+function foo($v) {
+  return (string)$v;
+}
+
+var_dump(foo(null));
+var_dump(foo(false));
+var_dump(foo(true));
+var_dump(foo(1));
+var_dump(foo(1.1));
+var_dump(foo("abc"));
+var_dump(foo(array(123)));
+class C { public function __toString() { return "a C"; } }
+var_dump(foo(new C));
+
+function bar($i) {
+  $v1 = "undefined";
+  $v2 = "undefined";
+  $v3 = "undefined";
+  $v4 = "undefined";
+  $v5 = "undefined";
+  $v6 = "undefined";
+  $v7 = "undefined";
+  $v8 = "undefined";
+  $v9 = "undefined";
+  $v10 = "undefined";
+  $v11 = "undefined";
+  if ($i >= 1) {
+    $v1 = null;
+    $v2 = false;
+    $v3 = true;
+    $v4 = 0;
+    $v5 = 1;
+    $v6 = 0.0;
+    $v7 = 1.1;
+    $v8 = "abc";
+    $v9 = new C();
+    $v10 = array();
+    $v11 = array(123);
+  }
+  var_dump((string)$v1);
+  var_dump((string)$v2);
+  var_dump((string)$v3);
+  var_dump((string)$v4);
+  var_dump((string)$v5);
+  var_dump((string)$v6);
+  var_dump((string)$v7);
+  var_dump((string)$v8);
+  var_dump((string)$v9);
+  var_dump((string)$v10);
+  var_dump((string)$v11);
+}
+
+bar(1);
+
+class D { }
+var_dump(foo(new D));
diff --git a/hphp/test/vm/cnvStr.php.exp b/hphp/test/vm/cnvStr.php.exp
new file mode 100644
index 000000000..35e48ee92
--- /dev/null
+++ b/hphp/test/vm/cnvStr.php.exp
@@ -0,0 +1,20 @@
+string(0) ""
+string(0) ""
+string(1) "1"
+string(1) "1"
+string(3) "1.1"
+string(3) "abc"
+string(5) "Array"
+string(3) "a C"
+string(0) ""
+string(0) ""
+string(1) "1"
+string(1) "0"
+string(1) "1"
+string(1) "0"
+string(3) "1.1"
+string(3) "abc"
+string(3) "a C"
+string(5) "Array"
+string(5) "Array"
+HipHop Fatal error: Bad type conversion: D::__toString() was not defined. in hphp/test/vm/cnvStr.php on line 4
diff --git a/hphp/test/vm/cnvStr.php.filter b/hphp/test/vm/cnvStr.php.filter
new file mode 120000
index 000000000..7b75548ca
--- /dev/null
+++ b/hphp/test/vm/cnvStr.php.filter
@@ -0,0 +1 @@
+filepath.filter
\ No newline at end of file