<target name="deploy">
<sf:deploy username="${sf.username}"
           password="${sf.password}"
           serverurl="${sf.serverurl}"
           deployRoot="${dir}"
           testLevel="RunSpecifiedTests"
           maxPoll="300">
   <runTest>Test1</runTest>
   <runTest>Test2</runTest>
</sf:deploy>

<target name="mydeploy">
  <sf:deploy username="${sf.username}"
             password="${sf.password}"
             serverurl="${sf.serverurl}"
             deployRoot="${dir}"
             testLevel="RunSpecifiedTests"
             maxPoll="300">
      <for list="Test1,Test2" param="test">
        <sequential>
            <runTest>"@{test}"</runTest>
        </sequential>
      </for>
  </sf:deploy>
</target>