[tw-mbp-yic pants_ij (master)]$ ./pants options | grep test | grep option | grep jvm
jvm.test.junit.options = ['-Djava.awt.headless=true', '-Xmx1g', '-XX:MaxPermSize=256m', '-XX:-UseSplitVerifier'] (from CONFIG)
test.junit.coverage_jvm_options = [] (from NONE)
test.junit.jvm_options = ['-Xmx1g', '-XX:MaxPermSize=256m'] (from CONFIG)