How to make maven not show warnings when running jUnit tests that expect an exception?

The Maven Surefire 2.7.2 plugin does not. Are you using JUnit 3 or 4?

A test like this does not output a single stack, neither to the output of maven, nor to the report file:

@Test(expected = NumberFormatException.class)
public void testForExpectedExceptionWithAnnotation()
        throws Exception {
    Integer.parseInt("This should blow up...");
}

In jUnit 3, such a test will also not print stacktrace. Your test looks like this:

public testForExpectedException() throws Exception{
  try{
    Integer.parseInt("This should blow up...");
 }catch(NumberFormatException e){
     //Just ignore it or do some asserts you could need
 }  

 fail("Exceptions not thrown");
}