$ mvn test -Dgroups="unit & !slow"

[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running com.ankurm.tutorials.junit.displaynestedtag.ValidationChecksTest
[WARNING] Tests run: 4, Failures: 0, Errors: 0, Skipped: 1, Time elapsed: 0.071 s -- in com.ankurm.tutorials.junit.displaynestedtag.ValidationChecksTest
[INFO] 
[INFO] Results:
[INFO] 
[WARNING] Tests run: 4, Failures: 0, Errors: 0, Skipped: 1
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
