diff --git a/hphp/test/ext/test_ext.h b/hphp/test/ext/test_ext.h
index ceb07cd4d..b244f7c94 100644
--- a/hphp/test/ext/test_ext.h
+++ b/hphp/test/ext/test_ext.h
@@ -48,7 +48,6 @@
 #include "hphp/test/ext/test_ext_mb.h"
 #include "hphp/test/ext/test_ext_mcrypt.h"
 #include "hphp/test/ext/test_ext_memcached.h"
-#include "hphp/test/ext/test_ext_misc.h"
 #include "hphp/test/ext/test_ext_mysql.h"
 #include "hphp/test/ext/test_ext_network.h"
 #include "hphp/test/ext/test_ext_openssl.h"
diff --git a/hphp/test/ext/test_ext_misc.cpp b/hphp/test/ext/test_ext_misc.cpp
deleted file mode 100644
index 684c74384..000000000
--- a/hphp/test/ext/test_ext_misc.cpp
+++ /dev/null
@@ -1,275 +0,0 @@
-/*
-   +----------------------------------------------------------------------+
-   | HipHop for PHP                                                       |
-   +----------------------------------------------------------------------+
-   | Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com)     |
-   +----------------------------------------------------------------------+
-   | This source file is subject to version 3.01 of the PHP license,      |
-   | that is bundled with this package in the file LICENSE, and is        |
-   | available through the world-wide-web at the following url:           |
-   | http://www.php.net/license/3_01.txt                                  |
-   | If you did not receive a copy of the PHP license and are unable to   |
-   | obtain it through the world-wide-web, please send a note to          |
-   | license@php.net so we can mail you a copy immediately.               |
-   +----------------------------------------------------------------------+
-*/
-
-#include "hphp/test/ext/test_ext_misc.h"
-#include "hphp/runtime/ext/ext_misc.h"
-#include "hphp/runtime/ext/ext_string.h"
-
-///////////////////////////////////////////////////////////////////////////////
-
-bool TestExtMisc::RunTests(const std::string &which) {
-  bool ret = true;
-
-  DECLARE_TEST_FUNCTIONS("");
-
-  RUN_TEST(test_connection_aborted);
-  RUN_TEST(test_connection_status);
-  RUN_TEST(test_connection_timeout);
-  RUN_TEST(test_constant);
-  RUN_TEST(test_define);
-  RUN_TEST(test_defined);
-  RUN_TEST(test_die);
-  RUN_TEST(test_exit);
-  RUN_TEST(test_eval);
-  RUN_TEST(test_get_browser);
-  RUN_TEST(test___halt_compiler);
-  RUN_TEST(test_highlight_file);
-  RUN_TEST(test_show_source);
-  RUN_TEST(test_highlight_string);
-  RUN_TEST(test_ignore_user_abort);
-  RUN_TEST(test_pack);
-  RUN_TEST(test_php_check_syntax);
-  RUN_TEST(test_php_strip_whitespace);
-  RUN_TEST(test_sleep);
-  RUN_TEST(test_usleep);
-  RUN_TEST(test_time_nanosleep);
-  RUN_TEST(test_time_sleep_until);
-  RUN_TEST(test_uniqid);
-  RUN_TEST(test_unpack);
-  RUN_TEST(test_sys_getloadavg);
-  RUN_TEST(test_token_get_all);
-  RUN_TEST(test_token_name);
-
-  return ret;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-bool TestExtMisc::test_connection_aborted() {
-  VERIFY(!f_connection_aborted());
-  return Count(true);
-}
-
-bool TestExtMisc::test_connection_status() {
-  VERIFY(f_connection_status() == k_CONNECTION_NORMAL);
-  return Count(true);
-}
-
-bool TestExtMisc::test_connection_timeout() {
-  VERIFY(!f_connection_timeout());
-  return Count(true);
-}
-
-bool TestExtMisc::test_constant() {
-  f_constant("a");
-  return Count(true);
-}
-
-bool TestExtMisc::test_define() {
-  // a function that's never called
-  return Count(true);
-}
-
-bool TestExtMisc::test_defined() {
-  VERIFY(!f_defined("a"));
-  return Count(true);
-}
-
-bool TestExtMisc::test_die() {
-  // can't really test this
-  return Count(true);
-}
-
-bool TestExtMisc::test_exit() {
-  // can't really test this
-  return Count(true);
-}
-
-bool TestExtMisc::test_eval() {
-  try {
-    f_eval("sleep(5);");
-  } catch (const NotSupportedException& e) {
-    return Count(false);
-  }
-  return Count(true);
-}
-
-bool TestExtMisc::test_get_browser() {
-  try {
-    f_get_browser();
-  } catch (const NotSupportedException& e) {
-    return Count(true);
-  }
-  return Count(false);
-}
-
-bool TestExtMisc::test___halt_compiler() {
-  f___halt_compiler();
-  return Count(true);
-}
-
-bool TestExtMisc::test_highlight_file() {
-  try {
-    f_highlight_file("a");
-  } catch (const NotSupportedException& e) {
-    return Count(true);
-  }
-  return Count(false);
-}
-
-bool TestExtMisc::test_show_source() {
-  try {
-    f_show_source("a");
-  } catch (const NotSupportedException& e) {
-    return Count(true);
-  }
-  return Count(false);
-}
-
-bool TestExtMisc::test_highlight_string() {
-  try {
-    f_highlight_string("a");
-  } catch (const NotSupportedException& e) {
-    return Count(true);
-  }
-  return Count(false);
-}
-
-bool TestExtMisc::test_ignore_user_abort() {
-  f_ignore_user_abort("a");
-  return Count(true);
-}
-
-bool TestExtMisc::test_pack() {
-  // covered in TestCodeRun::TestExtMisc
-  return Count(true);
-}
-
-bool TestExtMisc::test_php_check_syntax() {
-  try {
-    f_php_check_syntax("a");
-  } catch (const NotSupportedException& e) {
-    return Count(true);
-  }
-  return Count(false);
-}
-
-bool TestExtMisc::test_php_strip_whitespace() {
-  try {
-    f_php_strip_whitespace("a");
-  } catch (const NotSupportedException& e) {
-    return Count(true);
-  }
-  return Count(false);
-}
-
-bool TestExtMisc::test_sleep() {
-  f_sleep(1);
-  return Count(true);
-}
-
-bool TestExtMisc::test_usleep() {
-  f_usleep(1);
-  return Count(true);
-}
-
-bool TestExtMisc::test_time_nanosleep() {
-  f_time_nanosleep(0, 100);
-  return Count(true);
-}
-
-bool TestExtMisc::test_time_sleep_until() {
-  struct timeval tm;
-  gettimeofday((struct timeval *)&tm, nullptr);
-  double timestamp = tm.tv_sec + tm.tv_usec / 1000000.0 + 2;
-  f_time_sleep_until(timestamp);
-  return Count(true);
-}
-
-bool TestExtMisc::test_uniqid() {
-  VERIFY(!f_uniqid().empty());
-  return Count(true);
-}
-
-#define VUNPACK(fmt, inp, exp) \
-{ Array __a = f_unpack(fmt, inp); \
-  VS(__a.exists(1), true); \
-  VS(__a[1], (int64_t)exp); }
-
-bool TestExtMisc::test_unpack() {
-  // Also covered in TestCodeRun::TestExtMisc
-
-  String iFF = f_str_repeat("\xFF", sizeof(int));
-  String le32_FF("\xFF\x00\x00\x00", 4, AttachLiteral);
-  String be32_FF("\x00\x00\x00\xFF", 4, AttachLiteral);
-  String le16_FF("\xFF\x00", 2, AttachLiteral);
-  String be16_FF("\x00\xFF", 2, AttachLiteral);
-
-  uint32_t endian_check = 1;
-  bool le = ((char*)&endian_check)[0];
-
-  // HPHP, unlike PHP, truncates overflowing ints
-  if (sizeof(int) == 8) {
-    VUNPACK("I", iFF, 0x7FFFFFFFFFFFFFFF);
-  } else if (sizeof(int) == 4) {
-    VUNPACK("I", iFF, 0xFFFFFFFF);
-  } else {
-    // Panic
-    VS(true, false);
-  }
-
-  VUNPACK("i", iFF, -1);
-
-  // LlNV test 32-bit ints specifically
-  VUNPACK("L", iFF, 0xFFFFFFFF);
-  VUNPACK("l", iFF, -1);
-
-  VUNPACK("N", be32_FF, 0xFF);
-  VUNPACK("V", le32_FF, 0xFF);
-  VUNPACK("V", be32_FF, 0xFF000000);
-
-  VUNPACK("L", le ? le32_FF : be32_FF, 0xFF);
-
-  // Ssnv test 16-bit shorts
-  VUNPACK("S", iFF, 0xFFFF);
-  VUNPACK("s", iFF, -1);
-
-  VUNPACK("n", be16_FF, 0xFF);
-  VUNPACK("v", le16_FF, 0xFF);
-  VUNPACK("v", be16_FF, 0xFF00);
-
-  VUNPACK("S", le ? le16_FF : be16_FF, 0xFF);
-
-  return Count(true);
-}
-
-bool TestExtMisc::test_sys_getloadavg() {
-  VERIFY(f_sys_getloadavg().size() == 3);
-  return Count(true);
-}
-
-bool TestExtMisc::test_token_get_all() {
-  String src = "blarb <?php 1";
-  VS(f_token_get_all(src),
-     CREATE_VECTOR3(CREATE_VECTOR3(k_T_INLINE_HTML, "blarb ", 1),
-                    CREATE_VECTOR3(k_T_OPEN_TAG, "<?php ", 1),
-                    CREATE_VECTOR3(k_T_LNUMBER, "1", 1)));
-  return Count(true);
-}
-bool TestExtMisc::test_token_name() {
-    VS(f_token_name(258), "T_REQUIRE_ONCE");
-  return Count(true);
-}
diff --git a/hphp/test/ext/test_ext_misc.h b/hphp/test/ext/test_ext_misc.h
deleted file mode 100644
index 3475fcc32..000000000
--- a/hphp/test/ext/test_ext_misc.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
-   +----------------------------------------------------------------------+
-   | HipHop for PHP                                                       |
-   +----------------------------------------------------------------------+
-   | Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com)     |
-   +----------------------------------------------------------------------+
-   | This source file is subject to version 3.01 of the PHP license,      |
-   | that is bundled with this package in the file LICENSE, and is        |
-   | available through the world-wide-web at the following url:           |
-   | http://www.php.net/license/3_01.txt                                  |
-   | If you did not receive a copy of the PHP license and are unable to   |
-   | obtain it through the world-wide-web, please send a note to          |
-   | license@php.net so we can mail you a copy immediately.               |
-   +----------------------------------------------------------------------+
-*/
-
-#ifndef incl_HPHP_TEST_EXT_MISC_H_
-#define incl_HPHP_TEST_EXT_MISC_H_
-
-// >>>>>> Generated by idl.php. Do NOT modify. <<<<<<
-
-#include "hphp/test/ext/test_cpp_ext.h"
-
-///////////////////////////////////////////////////////////////////////////////
-
-class TestExtMisc : public TestCppExt {
- public:
-  virtual bool RunTests(const std::string &which);
-
-  bool test_connection_aborted();
-  bool test_connection_status();
-  bool test_connection_timeout();
-  bool test_constant();
-  bool test_define();
-  bool test_defined();
-  bool test_die();
-  bool test_exit();
-  bool test_eval();
-  bool test_get_browser();
-  bool test___halt_compiler();
-  bool test_highlight_file();
-  bool test_show_source();
-  bool test_highlight_string();
-  bool test_ignore_user_abort();
-  bool test_pack();
-  bool test_php_check_syntax();
-  bool test_php_strip_whitespace();
-  bool test_sleep();
-  bool test_usleep();
-  bool test_time_nanosleep();
-  bool test_time_sleep_until();
-  bool test_uniqid();
-  bool test_unpack();
-  bool test_sys_getloadavg();
-  bool test_token_get_all();
-  bool test_token_name();
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-#endif // incl_HPHP_TEST_EXT_MISC_H_
diff --git a/hphp/test/slow/ext_misc/ext_misc.php b/hphp/test/slow/ext_misc/ext_misc.php
new file mode 100644
index 000000000..71ee1dd23
--- /dev/null
+++ b/hphp/test/slow/ext_misc/ext_misc.php
@@ -0,0 +1,27 @@
+<?php
+
+function VS($x, $y) {
+  var_dump($x === $y);
+  if ($x !== $y) { echo "Failed: $y\n"; echo "Got: $x\n";
+                   var_dump(debug_backtrace()); }
+}
+function VERIFY($x) { VS($x, true); }
+
+//////////////////////////////////////////////////////////////////////
+
+
+VERIFY(connection_aborted() != true);
+VERIFY(connection_status() == CONNECTION_NORMAL);
+VERIFY(connection_timeout() != true);
+constant("a");
+VERIFY(defined("a") != true);
+__halt_compiler();
+ignore_user_abort("a");
+VERIFY(empty(uniqid()) != true);
+VS(token_name(258), "T_REQUIRE_ONCE");
+VS(count(sys_getloadavg()), 3);
+
+$src = "blarb <?php 1";
+VS(token_get_all(src),
+   array(array(T_INLINE_HTML, "blarb ", 1),
+         array(T_OPEN_TAG, "<?php", 1)));
diff --git a/hphp/test/slow/ext_misc/ext_misc.php.expect b/hphp/test/slow/ext_misc/ext_misc.php.expect
new file mode 100644
index 000000000..574734e3d
--- /dev/null
+++ b/hphp/test/slow/ext_misc/ext_misc.php.expect
@@ -0,0 +1,4 @@
+bool(true)
+bool(true)
+bool(true)
+bool(true)
diff --git a/hphp/test/slow/ext_misc/unpack.php b/hphp/test/slow/ext_misc/unpack.php
new file mode 100644
index 000000000..4037d1017
--- /dev/null
+++ b/hphp/test/slow/ext_misc/unpack.php
@@ -0,0 +1,48 @@
+<?php
+
+function VS($x, $y) {
+  var_dump($x === $y);
+  if ($x !== $y) { echo "Failed: $y\n"; echo "Got: $x\n";
+                   var_dump(debug_backtrace()); }
+}
+
+function VUNPACK($fmt, $inp, $exp) {
+  $a = unpack($fmt, $inp);
+  VS(isset($a[1]), true);
+  VS($a[1], (int)$exp);
+}
+
+function test_unpack() {
+  $iFF = str_repeat("\xFF", 4);
+  $le32_FF = "\xFF\x00\x00\x00";
+  $be32_FF = "\x00\x00\x00\xFF";
+  $le16_FF = "\xFF\x00";
+  $be16_FF = "\x00\xFF";
+
+  // HPHP, unlike PHP, truncates overflowing ints
+  VUNPACK("I", $iFF, 0xFFFFFFFF);
+
+  VUNPACK("i", $iFF, -1);
+
+  // LlNV test 32-bit ints specifically
+  VUNPACK("L", $iFF, 0xFFFFFFFF);
+  VUNPACK("l", $iFF, -1);
+
+  VUNPACK("N", $be32_FF, 0xFF);
+  VUNPACK("V", $le32_FF, 0xFF);
+  VUNPACK("V", $be32_FF, 0xFF000000);
+
+  VUNPACK("L", $le32_FF, 0xFF);
+
+  // Ssnv test 16-bit shorts
+  VUNPACK("S", $iFF, 0xFFFF);
+  VUNPACK("s", $iFF, -1);
+
+  VUNPACK("n", $be16_FF, 0xFF);
+  VUNPACK("v", $le16_FF, 0xFF);
+  VUNPACK("v", $be16_FF, 0xFF00);
+
+  VUNPACK("S", $le16_FF, 0xFF);
+}
+
+test_unpack();
diff --git a/hphp/test/slow/ext_misc/unpack.php.expect b/hphp/test/slow/ext_misc/unpack.php.expect
new file mode 100644
index 000000000..fbd746545
--- /dev/null
+++ b/hphp/test/slow/ext_misc/unpack.php.expect
@@ -0,0 +1,28 @@
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)