diff --git a/ext/date/tests/date_diff.phpt b/ext/date/tests/date_diff.phpt
index 31783a884de..e01a94e7679 100644
--- a/ext/date/tests/date_diff.phpt
+++ b/ext/date/tests/date_diff.phpt
@@ -1,5 +1,9 @@
 --TEST--
 Extensive test for date_diff().
+--SKIPIF--
+<?php
+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
+?>
 --INI--
 date.timezone=UTC
 --FILE--
diff --git a/ext/standard/tests/file/001.phpt b/ext/standard/tests/file/001.phpt
index e3768b19dd7..d604699ac4f 100644
--- a/ext/standard/tests/file/001.phpt
+++ b/ext/standard/tests/file/001.phpt
@@ -5,6 +5,7 @@ File type functions
 if (substr(PHP_OS, 0, 3) == 'WIN') {
     die('skip no symlinks on Windows');
 }
+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
 ?>
 --FILE--
 <?php
diff --git a/ext/standard/tests/file/005_variation.phpt b/ext/standard/tests/file/005_variation.phpt
index e46df865fce..7e5eedc2b16 100644
--- a/ext/standard/tests/file/005_variation.phpt
+++ b/ext/standard/tests/file/005_variation.phpt
@@ -5,6 +5,9 @@ Test fileatime(), filemtime(), filectime() & touch() functions : usage variation
 if (substr(PHP_OS, 0, 3) == 'WIN') {
     die('skip Do not run on Windows');
 }
+if (getenv("SKIP_SLOW_TESTS")) {
+    die("skip slow test");
+}
 ?>
 --FILE--
 <?php
diff --git a/ext/standard/tests/file/fread_socket_variation1.phpt b/ext/standard/tests/file/fread_socket_variation1.phpt
index bd3d23ac574..50ee79bbf9f 100644
--- a/ext/standard/tests/file/fread_socket_variation1.phpt
+++ b/ext/standard/tests/file/fread_socket_variation1.phpt
@@ -1,5 +1,9 @@
 --TEST--
 Testing fread() on a TCP server socket
+--SKIPIF--
+<?php
+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
+?>
 --FILE--
 <?php
 
diff --git a/ext/standard/tests/general_functions/proc_open02.phpt b/ext/standard/tests/general_functions/proc_open02.phpt
index 3cba15e9ad6..3406f6806c5 100644
--- a/ext/standard/tests/general_functions/proc_open02.phpt
+++ b/ext/standard/tests/general_functions/proc_open02.phpt
@@ -4,6 +4,7 @@ proc_open
 <?php
 if (!is_executable('/bin/sleep')) echo 'skip no sleep';
 if (!is_executable('/usr/bin/nohup')) echo 'skip no nohup';
+if (getenv('SKIP_SLOW_TESTS')) echo 'skip slow test';
 ?>
 --FILE--
 <?php
diff --git a/ext/standard/tests/misc/time_nanosleep_basic.phpt b/ext/standard/tests/misc/time_nanosleep_basic.phpt
index 799c57209e4..3f20b00f7aa 100644
--- a/ext/standard/tests/misc/time_nanosleep_basic.phpt
+++ b/ext/standard/tests/misc/time_nanosleep_basic.phpt
@@ -1,7 +1,9 @@
 --TEST--
 time_nanosleep — Delay for a number of seconds and nanoseconds
 --SKIPIF--
-<?php if (!function_exists('time_nanosleep')) die("skip"); ?>
+<?php if (!function_exists('time_nanosleep')) die("skip");
+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
+?>
 --CREDITS--
 Àlex Corretgé - alex@corretge.cat
 --FILE--
diff --git a/ext/standard/tests/strings/htmlentities_html4.phpt b/ext/standard/tests/strings/htmlentities_html4.phpt
index 3f700e828a4..d7bff707fdb 100644
--- a/ext/standard/tests/strings/htmlentities_html4.phpt
+++ b/ext/standard/tests/strings/htmlentities_html4.phpt
@@ -1,5 +1,9 @@
 --TEST--
 htmlentities() conformance check (HTML 4)
+--SKIPIF--
+<?php
+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
+?>
 --FILE--
 <?php
 function utf32_utf8($k) {
diff --git a/tests/func/005a.phpt b/tests/func/005a.phpt
index f7843e10a32..3c2bcb16650 100644
--- a/tests/func/005a.phpt
+++ b/tests/func/005a.phpt
@@ -1,5 +1,9 @@
 --TEST--
 Testing register_shutdown_function() with timeout. (Bug: #21513)
+--SKIPIF--
+<?php
+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
+?>
 --FILE--
 <?php
 
diff --git a/tests/func/010.phpt b/tests/func/010.phpt
index 6778ed2f11f..f970283dc47 100644
--- a/tests/func/010.phpt
+++ b/tests/func/010.phpt
@@ -1,5 +1,9 @@
 --TEST--
 function with many parameters
+--SKIPIF--
+<?php
+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
+?>
 --FILE--
 <?php