<goals>
              <goal>test</goal>
            </goals>
            <configuration>
              <module>com.google.common.GuavaTests</module>
              <includes>**/GwtTestSuite.java</includes>
              <logLevel>${gwt.logLevel}</logLevel>
              <mode>htmlunit</mode>
              <htmlunit>FF38</htmlunit>
              <productionMode>true</productionMode>