Maven Surefire configuration for CI server

I used this configuration for long time now but not sure you know that.
The use case is an application creating a temp file to store values (File.createTempFile( "wine.txt", "wine" ); )
Running it locally no problem.
But now you have a ci server running the same Maven project with various parameters:
* one fast only executing unit tests
* one longer running selenium integration tests.

On Unix server, the temp directory is shared for all users (usually /tmp, /var/tmp etc...).
So if your build runs in parallel they will share the same file (can go to weird results ..)

To avoid such case, you can configure surefire plugin as it


      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-surefire-plugin</artifactId>
        <configuration>
          <systemPropertyVariables>
            <java.io.tmpdir>${project.build.directory}</java.io.tmpdir>
          </systemPropertyVariables>
        </configuration>
      </plugin>

As it each build will use a separate tmp directory and temporary files won't be shared anymore.