diff --git a/Zend/tests/gc_029.phpt b/Zend/tests/gc_029.phpt
index 438053414a8..edd231760c6 100644
--- a/Zend/tests/gc_029.phpt
+++ b/Zend/tests/gc_029.phpt
@@ -1,5 +1,7 @@
 --TEST--
 GC 029: GC and destructors
+--SKIPIF--
+<?php if (PHP_ZTS) { print "skip only for no-zts build"; }
 --INI--
 zend.enable_gc=1
 --FILE--
diff --git a/Zend/tests/gc_029_zts.phpt b/Zend/tests/gc_029_zts.phpt
new file mode 100644
index 00000000000..fc77e1f3bd9
--- /dev/null
+++ b/Zend/tests/gc_029_zts.phpt
@@ -0,0 +1,37 @@
+--TEST--
+GC 029: GC and destructors
+--SKIPIF-- 
+<?php if (!PHP_ZTS) { print "skip only for zts build"; }
+--INI--
+zend.enable_gc=1
+--FILE--
+<?php
+class Foo {
+	public $bar;
+	public $x = array(1,2,3);
+	function __destruct() {
+		if ($this->bar !== null) {
+			$this->x = null;
+			unset($this->bar);
+		}
+	}
+}
+class Bar {
+	public $foo;
+        function __destruct() {
+                if ($this->foo !== null) {
+                        unset($this->foo);
+                }
+        }
+
+}
+$foo = new Foo();
+$bar = new Bar();
+$foo->bar = $bar;
+$bar->foo = $foo;
+unset($foo);
+unset($bar);
+var_dump(gc_collect_cycles());
+?>
+--EXPECT--
+int(3)