diff --git a/phpunit.xml b/phpunit.xml
index 1c24102..243c994 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit colors="true" bootstrap="phpunit.php">
+<phpunit colors="true" backupGlobals="false" bootstrap="phpunit.php">
     <testsuites>
         <testsuite>
             <directory>tests</directory>