src/test/resources/testng-ant.xml

<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
  
<suite name="Suitename from xml" verbose="1" parallel="false" thread-count="2">
  
  <test name="TestName">
    <classes>
      <class name="NoPackageTest" />
    </classes>
  </test>
</suite>