build?
                -->
              <extraJvmArgs>-Dgwt.watchFileChanges=false</extraJvmArgs>
            </configuration>
          </execution>
          <!--
            GWT issues some scary warnings while running tests, but I believe they are harmless.
            Let's take the warnings for one module, c.g.c.base.testModule, as an example:

              [INFO] Validating units:

    <suppress checks="JavadocPackage"
              files=".*[/\\]publish[/\\]src[/\\]main[/\\]java[/\\]org[/\\]gradle[/\\]api[/\\]tasks[/\\][^/\\]+"/>
    <suppress checks="JavadocPackage"
              files=".*[/\\]scala[/\\]src[/\\]main[/\\]java[/\\]org[/\\]gradle[/\\]api[/\\]tasks[/\\][^/\\]+"/>
    <suppress checks="JavadocPackage"
              files=".*[/\\]base-services[/\\]src[/\\]main[/\\]java[/\\]org[/\\]gradle[/\\]api[/\\][^/\\]+"/>