diff --git a/Zend/tests/bug63055.phpt b/Zend/tests/bug63055.phpt
index 711385a3ce1..5efff9e5bd8 100644
--- a/Zend/tests/bug63055.phpt
+++ b/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 */
diff --git a/Zend/tests/bug64896.phpt b/Zend/tests/bug64896.phpt
index 573fa1242df..f01969782fc 100644
--- a/Zend/tests/bug64896.phpt
+++ b/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;
diff --git a/Zend/tests/constant_arrays.phpt b/Zend/tests/constant_arrays.phpt
index 5bb8717604a..46a0f9252e5 100644
--- a/Zend/tests/constant_arrays.phpt
+++ b/Zend/tests/constant_arrays.phpt
@@ -1,5 +1,7 @@
 --TEST--
 Constant arrays
+--INI--
+zend.enable_gc=1
 --FILE--
 <?php
 
diff --git a/Zend/tests/each_003.phpt b/Zend/tests/each_003.phpt
index 2361d6a314c..fbd54550fc6 100644
--- a/Zend/tests/each_003.phpt
+++ b/Zend/tests/each_003.phpt
@@ -1,5 +1,7 @@
 --TEST--
 Testing each() with recursion
+--INI--
+zend.enable_gc=1
 --FILE--
 <?php
 
diff --git a/Zend/tests/foreach_002.phpt b/Zend/tests/foreach_002.phpt
index 5523424ce95..77fe20cb64c 100644
--- a/Zend/tests/foreach_002.phpt
+++ b/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
 
diff --git a/Zend/tests/gc_032.phpt b/Zend/tests/gc_032.phpt
index 84ce2ff7e6f..cd30ed7cb6a 100644
--- a/Zend/tests/gc_032.phpt
+++ b/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();
diff --git a/Zend/tests/varSyntax/parenthesesDeref.phpt b/Zend/tests/varSyntax/parenthesesDeref.phpt
index 0ebfe9c5d72..f22b34ac42c 100644
--- a/Zend/tests/varSyntax/parenthesesDeref.phpt
+++ b/Zend/tests/varSyntax/parenthesesDeref.phpt
@@ -1,5 +1,7 @@
 --TEST--
 Dereferencing expression parentheses
+--INI--
+zend.enable_gc=1
 --FILE--
 <?php