diff --git a/Zend/tests/gh13670_001.phpt b/Zend/tests/gh13670_001.phpt
index def8fa3f5f2..f1cd32ea8bc 100644
--- a/Zend/tests/gh13670_001.phpt
+++ b/Zend/tests/gh13670_001.phpt
@@ -1,5 +1,10 @@
 --TEST--
 GH-13670 001
+--SKIPIF--
+<?php
+// gc_threshold is global state
+if (getenv('SKIP_REPEAT')) die('skip Not repeatable');
+?>
 --FILE--
 <?php
 
diff --git a/Zend/tests/gh13670_002.phpt b/Zend/tests/gh13670_002.phpt
index c822585e363..3ae0456e7aa 100644
--- a/Zend/tests/gh13670_002.phpt
+++ b/Zend/tests/gh13670_002.phpt
@@ -1,5 +1,10 @@
 --TEST--
 GH-13670 002
+--SKIPIF--
+<?php
+// gc_threshold is global state
+if (getenv('SKIP_REPEAT')) die('skip Not repeatable');
+?>
 --FILE--
 <?php
 
diff --git a/Zend/tests/gh13670_003.phpt b/Zend/tests/gh13670_003.phpt
index defd3da4386..e8cbb701ae0 100644
--- a/Zend/tests/gh13670_003.phpt
+++ b/Zend/tests/gh13670_003.phpt
@@ -1,5 +1,10 @@
 --TEST--
 GH-13670 003
+--SKIPIF--
+<?php
+// gc_threshold is global state
+if (getenv('SKIP_REPEAT')) die('skip Not repeatable');
+?>
 --FILE--
 <?php