diff --git a/ext/date/tests/bug51819.phpt b/ext/date/tests/bug51819.phpt
index afcb9c7..7e9bbec 100644
--- a/ext/date/tests/bug51819.phpt
+++ b/ext/date/tests/bug51819.phpt
@@ -2,6 +2,7 @@
 Bug #51819 (Case discrepancy in timezone names cause Uncaught exception and fatal error)
 --FILE--
 <?php
+date_default_timezone_set('UTC');
 $aTzAbbr = timezone_abbreviations_list();
 
 $aTz = array();
diff --git a/ext/phar/tests/bug52013.phpt b/ext/phar/tests/bug52013.phpt
index f4635a4..04a7189 100644
--- a/ext/phar/tests/bug52013.phpt
+++ b/ext/phar/tests/bug52013.phpt
@@ -6,7 +6,7 @@ http://bugs.php.net/bug.php?id=52013
 --CREDITS--
 Frederic Hardy frederic.hardy@mageekbox.net
 --SKIPIF--
-<?php if (!extension_loaded("phar")) die("skip"); ?>
+<?php if (!extension_loaded("phar") || !extension_loaded("zlib")) die("skip"); ?>
 --INI--
 phar.require_hash=0
 phar.readonly=0