diff --git a/Zend/tests/bug55509.phpt b/Zend/tests/bug55509.phpt
index 1ae5b04f8a0..b45150a4979 100644
--- a/Zend/tests/bug55509.phpt
+++ b/Zend/tests/bug55509.phpt
@@ -49,8 +49,11 @@ elseif (PHP_OS == 'FreeBSD') {
     die('skip Not enough memory.');
   }
 } elseif (PHP_OS == "WINNT") {
-  $s = trim(shell_exec("wmic OS get FreeVirtualMemory /Value 2>nul"));
-  $freeMemory = explode('=', $s)[1]*1;
+  $s = shell_exec("wmic OS get FreeVirtualMemory /Value 2>nul");
+  if (!$s) {
+    die('skip wmic not available');
+  }
+  $freeMemory = explode('=', trim($s))[1]*1;
 
   if ($freeMemory < 2.1*1024*1024) {
     die('skip Not enough memory.');
diff --git a/ext/standard/tests/general_functions/proc_nice_basic-win.phpt b/ext/standard/tests/general_functions/proc_nice_basic-win.phpt
index 20e8454f8b5..0aee620c89b 100644
--- a/ext/standard/tests/general_functions/proc_nice_basic-win.phpt
+++ b/ext/standard/tests/general_functions/proc_nice_basic-win.phpt
@@ -11,6 +11,10 @@ if (!defined('PHP_WINDOWS_VERSION_MAJOR')) {
 if (getenv('SKIP_SLOW_TESTS')) {
     die('skip: Slow test');
 }
+
+if (!shell_exec("where wmic 2>nul")) {
+    die('skip wmic not available');
+}
 ?>
 --FILE--
 <?php