JUnit4 and Maven – minimal example

When I migrated an old project from JUnit3 to JUnit4, I ran into some problems. mvn:test produced an error:

junit.framework.AssertionFailedError: No tests found in minimal.DoSomeActionTest

>The test classes were no longer available. I found that I had to remove inheritance from :TestCase() and annotate all test methods with @Test. Here is a trivial example:

package minimal;
import org.junit.Assert;
import org.junit.Test;
public class DoSomeActionTest {
    public void testIsThisReallyTrue() {

In case you have your project managed by maven, remember to make use of the maven-compiler-plugin to enforce Java 1.6 (required for annotations):


When running mvn:test you should get following positive message:

 T E S T S
Running minimal.DoSomeActionTest

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.047 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2 seconds
[INFO] Finished at: Sun Jul 11 17:22:44 CEST 2010
[INFO] Final Memory: 10M/19M
[INFO] ------------------------------------------------------------------------

I have prepared a working maven project. It was published at github. Get your local copy by cloning with git:

git clone git://github.com/sastay/JUnit4-and-Maven-Example.git

3 thoughts on “JUnit4 and Maven – minimal example

  1. Thanks for posting this. It was very helpful, in particular the xml for the surefire plugin, without which my tests were not being found. I’m good now.

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