OutOfMemoryError during JUnitReport ant task after running testsuite on Windows reagrdless of Xmx setting in ANT_OPTS

jboass-as/testsuite/build.bat ignore ANT_OPTS variable and fails running testsuite after tests during JUnitReport ant task because of low heap.
The problem is in jboass-as/testsuite/build.bat on line nubber 28:
There is
set ANT_OPTS=-Xmx256m -Djava.protocol.handler.pkgs=org.jboss.net.protocol -Dbuild.script=build.bat
but there should be
set ANT_OPTS=%ANT_OPTS% -Xmx2024m -Djava.protocol.handler.pkgs=org.jboss.net.protocol -Dbuild.script=build.bat
in the same way as in the jboass-as/testsuite/build.sh