diff --git a/tests/phpunit/tests/user/mapMetaCap.php b/tests/phpunit/tests/user/mapMetaCap.php
index b969a5d8f4f58..d4275166a7ee4 100644
--- a/tests/phpunit/tests/user/mapMetaCap.php
+++ b/tests/phpunit/tests/user/mapMetaCap.php
@@ -36,7 +36,7 @@ public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
 
 	public static function wpTearDownAfterClass() {
 		$GLOBALS['super_admins'] = self::$super_admins;
-		unset( $GLOBALS['wp_post_types'][ self::$post_type ] );
+		unregister_post_type( self::$post_type );
 	}
 
 	/**