diff --git a/ext/standard/tests/file/copy_variation15.phpt b/ext/standard/tests/file/copy_variation15.phpt
index a6404fcd8d6..fbf5e7bf9eb 100644
--- a/ext/standard/tests/file/copy_variation15.phpt
+++ b/ext/standard/tests/file/copy_variation15.phpt
@@ -2,8 +2,8 @@
 Test copy() function: usage variations - destination dir access perms
 --SKIPIF--
 <?php
-if( (stristr(PHP_OS, "Darwin")) || (stristr(PHP_OS, "Win")) )
-  die("skip do not run on MacOS/Windows");
+if(substr(PHP_OS, 0, 3) == 'WIN')
+  die("skip do not run on Windows");
 // Skip if being run by root (files are always readable, writeable and executable)
 $filename = dirname(__FILE__)."/copy_variation15_root_check.tmp";
 $fp = fopen($filename, 'w');
diff --git a/ext/standard/tests/file/copy_variation9.phpt b/ext/standard/tests/file/copy_variation9.phpt
index ffe6dbe914d..d078c891bbd 100644
--- a/ext/standard/tests/file/copy_variation9.phpt
+++ b/ext/standard/tests/file/copy_variation9.phpt
@@ -2,8 +2,8 @@
 Test copy() function: usage variations - destination file access perms 
 --SKIPIF--
 <?php
-if( (stristr(PHP_OS, "Darwin")) || (stristr(PHP_OS, "Win")) )
-  die("skip do not run on MacOS/Windows");
+if(substr(PHP_OS, 0, 3) == 'WIN')
+  die("skip do not run on Windows");
 
 // Skip if being run by root (files are always readable, writeable and executable)
 $filename = dirname(__FILE__)."/copy_variation9_root_check.tmp";
diff --git a/ext/standard/tests/file/fnmatch_basic.phpt b/ext/standard/tests/file/fnmatch_basic.phpt
index 0b6db879c28..76fdf9ed6da 100644
--- a/ext/standard/tests/file/fnmatch_basic.phpt
+++ b/ext/standard/tests/file/fnmatch_basic.phpt
@@ -2,8 +2,8 @@
 Test fnmatch() function: Basic functionality
 --SKIPIF--
 <?php
-if( (stristr(PHP_OS, "Mac")) || (stristr(PHP_OS, "Win")) )
-  die("skip do not run on MacOS/Windows");
+if(substr(PHP_OS, 0, 3) == 'WIN')
+  die("skip do not run on Windows");
 ?>
 --FILE--
 <?php
diff --git a/ext/standard/tests/file/fnmatch_error.phpt b/ext/standard/tests/file/fnmatch_error.phpt
index ded6ac93af1..87505738e2a 100644
--- a/ext/standard/tests/file/fnmatch_error.phpt
+++ b/ext/standard/tests/file/fnmatch_error.phpt
@@ -2,8 +2,8 @@
 Test fnmatch() function: Error conditions
 --SKIPIF--
 <?php
-if( (stristr(PHP_OS, "Mac")) || (stristr(PHP_OS, "Win")) )
-  die("skip do not run on MacOS/Windows");
+if(substr(PHP_OS, 0, 3) == 'WIN')
+  die("skip do not run on Windows");
 ?>
 --FILE--
 <?php
diff --git a/ext/standard/tests/file/fnmatch_variation.phpt b/ext/standard/tests/file/fnmatch_variation.phpt
index c6550ef1d93..008d4d5ab42 100644
--- a/ext/standard/tests/file/fnmatch_variation.phpt
+++ b/ext/standard/tests/file/fnmatch_variation.phpt
@@ -2,8 +2,8 @@
 Test fnmatch() function: Variations
 --SKIPIF--
 <?php
-if( (stristr(PHP_OS, "Mac")) || (stristr(PHP_OS, "Win")) )
-  die("skip do not run on MacOS/Windows");
+if(substr(PHP_OS, 0, 3) == 'WIN')
+  die("skip do not run on Windows");
 ?>
 --FILE--
 <?php