diff --git a/tests/generators_to_v8_001.phpt b/tests/generators_to_v8_001.phpt
index eab789b..7e53614 100644
--- a/tests/generators_to_v8_001.phpt
+++ b/tests/generators_to_v8_001.phpt
@@ -1,7 +1,15 @@
 --TEST--
 Test V8::executeString() : Generators PHP -> V8 (instantite in JS)
 --SKIPIF--
-<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+<?php
+require_once(dirname(__FILE__) . '/skipif.inc');
+
+// Actually this check is a bit bad as it tests import, but currently
+// there is no flag we can check for export
+if (!class_exists('V8Generator')) {
+    die("skip Installed V8 version doesn't support generators");
+}
+?>
 --FILE--
 <?php
 
diff --git a/tests/generators_to_v8_002.phpt b/tests/generators_to_v8_002.phpt
index 0eea712..2881225 100644
--- a/tests/generators_to_v8_002.phpt
+++ b/tests/generators_to_v8_002.phpt
@@ -1,7 +1,15 @@
 --TEST--
 Test V8::executeString() : Generators PHP -> V8 (instantiate in JS, iterate in PHP)
 --SKIPIF--
-<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+<?php
+require_once(dirname(__FILE__) . '/skipif.inc');
+
+// Actually this check is a bit bad as it tests import, but currently
+// there is no flag we can check for export
+if (!class_exists('V8Generator')) {
+    die("skip Installed V8 version doesn't support generators");
+}
+?>
 --FILE--
 <?php
 
diff --git a/tests/generators_to_v8_003.phpt b/tests/generators_to_v8_003.phpt
index d020423..269b45a 100644
--- a/tests/generators_to_v8_003.phpt
+++ b/tests/generators_to_v8_003.phpt
@@ -1,7 +1,15 @@
 --TEST--
 Test V8::executeString() : Generators PHP -> V8 (instantiate in JS, iterate in PHP)
 --SKIPIF--
-<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+<?php
+require_once(dirname(__FILE__) . '/skipif.inc');
+
+// Actually this check is a bit bad as it tests import, but currently
+// there is no flag we can check for export
+if (!class_exists('V8Generator')) {
+    die("skip Installed V8 version doesn't support generators");
+}
+?>
 --FILE--
 <?php
 
diff --git a/tests/generators_to_v8_004.phpt b/tests/generators_to_v8_004.phpt
index 97d9bdd..ea2e6d8 100644
--- a/tests/generators_to_v8_004.phpt
+++ b/tests/generators_to_v8_004.phpt
@@ -1,7 +1,15 @@
 --TEST--
 Test V8::executeString() : Generators PHP -> V8 (yield from)
 --SKIPIF--
-<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+<?php
+require_once(dirname(__FILE__) . '/skipif.inc');
+
+// Actually this check is a bit bad as it tests import, but currently
+// there is no flag we can check for export
+if (!class_exists('V8Generator')) {
+    die("skip Installed V8 version doesn't support generators");
+}
+?>
 --FILE--
 <?php
 
diff --git a/tests/generators_to_v8_basic.phpt b/tests/generators_to_v8_basic.phpt
index d14a35d..7382755 100644
--- a/tests/generators_to_v8_basic.phpt
+++ b/tests/generators_to_v8_basic.phpt
@@ -1,7 +1,15 @@
 --TEST--
 Test V8::executeString() : Generators PHP -> V8
 --SKIPIF--
-<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+<?php
+require_once(dirname(__FILE__) . '/skipif.inc');
+
+// Actually this check is a bit bad as it tests import, but currently
+// there is no flag we can check for export
+if (!class_exists('V8Generator')) {
+    die("skip Installed V8 version doesn't support generators");
+}
+?>
 --FILE--
 <?php