These tests all have intentional circular references

and they will leak and cause failures unless gc is enabled

Zend/tests/bug63055.phpt

@@ -1,5 +1,7 @@
 --TEST--
 Bug #63055 (Segfault in zend_gc with SF2 testsuite)
+--INI--
+zend.enable_gc=1
 --FILE--
 <?php
 /* the default gc root size is 10,000 */

Zend/tests/bug64896.phpt

@@ -1,5 +1,7 @@
 --TEST--
 Bug #64896 (Segfault with gc_collect_cycles using unserialize on certain objects)
+--INI--
+zend.enable_gc=1
 --FILE--
 <?php
 $bar = NULL;

Zend/tests/constant_arrays.phpt

@@ -1,5 +1,7 @@
 --TEST--
 Constant arrays
+--INI--
+zend.enable_gc=1
 --FILE--
 <?php
 

Zend/tests/each_003.phpt

@@ -1,5 +1,7 @@
 --TEST--
 Testing each() with recursion
+--INI--
+zend.enable_gc=1
 --FILE--
 <?php
 

Zend/tests/foreach_002.phpt

@@ -1,5 +1,7 @@
 --TEST--
 Creating recursive array on foreach using same variable
+--INI--
+zend.enable_gc=1
 --FILE--
 <?php
 

Zend/tests/gc_032.phpt

@@ -1,5 +1,7 @@
 --TEST--
 GC 032: Crash in GC because of invalid reference counting
+--INI--
+zend.enable_gc=1
 --FILE--
 <?php
 $a = array();

Zend/tests/varSyntax/parenthesesDeref.phpt

@@ -1,5 +1,7 @@
 --TEST--
 Dereferencing expression parentheses
+--INI--
+zend.enable_gc=1
 --FILE--
 <?php