Tests fail on Ubuntu 12.04, stock emacs and maven

[bitonic]

I get this failure when issuing mvn package:

Results :

Failed tests:   objectHasNoSuper(org.grumblesmurf.malabar.ClasspathTest): 
  superOfIntegerIsNumber(org.grumblesmurf.malabar.ClasspathTest): 
  classInfoOfEnumDoesntInfLoop(org.grumblesmurf.malabar.ClasspathTest): 

Tests in error: 
  inputStreamImplementsCloseable(org.grumblesmurf.malabar.ClasspathTest): index is out of range 0..-1 (index = 0)
  outputStreamImplementsCloseableAndFlushable(org.grumblesmurf.malabar.ClasspathTest): index is out of range 0..-1 (index = 0)
  collectionImplementsIterableE(org.grumblesmurf.malabar.ClasspathTest): index is out of range 0..-1 (index = 0)
  scannerImplementsIteratorString(org.grumblesmurf.malabar.ClasspathTest): index is out of range 0..-1 (index = 0)

Is this important? Can I build the package in some way skipping the tests?