A single test can be run by using the following command, where package should be replaced by the class's package and class should be replaced by the name of the class.
maven test:single -Dtestcase=[package].[classname]
For instance, to run the FixedConeClustererTest, use this command.
maven test:single -Dtestcase=org.lcsim.recon.cluster.fixedcone.FixedConeClustererTest