Fix an error with new PHPunit

Author: greenlion

phpunit.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit backupGlobals="false"
   backupStaticAttributes="false"
-  syntaxCheck="false" verbose="true"
+  verbose="true"
   bootstrap="tests/bootstrap.php">
   <testsuites>
     <testsuite name="Tests">