diff --git a/tests/phpunit/tests/url.php b/tests/phpunit/tests/url.php
index 4b4121e9c4..177a7a889e 100644
--- a/tests/phpunit/tests/url.php
+++ b/tests/phpunit/tests/url.php
@@ -6,6 +6,7 @@ class Tests_URL extends WP_UnitTestCase {
 	function setUp() {
 		parent::setUp();
 		$this->_old_server = $_SERVER;
+		$GLOBALS['pagenow'] = '';
 	}
 
 	function tearDown() {