Maven plugin not using project set in <projectFile>

Project file is set as follows:

  <configuration>    
                 <projectFile>${project.basedir}/test/soapui/scripts/IntegrationTest.xml</projectFile>
                   ...
            </configuration> 

Yet the plugin always tries to use pom's <artifactId> for project file.

   <artifactId>IntegrationTest</artifactId>

So when I attempt to build:

mvn -X com.smartbear.soapui:soapui-maven-plugin:4.6.1:test

This gets thrown up:

[ERROR] Failed to execute goal com.smartbear.soapui:soapui-maven-plugin:4.6.1:test (default-cli) on project IntegrationTest: SoapUI Test(s) failed: SoapUI Test(s) failed:
[ERROR] Failed to load SoapUI project file [IntegrationTest-soapui-project.xml]

I've tried putting full path of the project (/Users/../../../../IntegrationTest.xml) but always get the same result. It's like the plugin completely ignores what I set in configuration.