diff --git a/tests/phpunit/tests/auth.php b/tests/phpunit/tests/auth.php
index f2d6552102..e304652527 100644
--- a/tests/phpunit/tests/auth.php
+++ b/tests/phpunit/tests/auth.php
@@ -9,6 +9,8 @@ class Tests_Auth extends WP_UnitTestCase {
 	function setUp() {
 		parent::setUp();
 		$this->user_id = $this->factory->user->create();
+
+		$_SERVER['REQUEST_METHOD'] = null;
 	}
 
 	function test_auth_cookie_valid() {