clover-for-grails plugin is not working with grails.project.fork

Error running forked test-app: No such property: testNames for class: _Events
groovy.lang.MissingPropertyException: No such property: testNames for class: _Ev
ents
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptByteco
deAdapter.java:50)
        at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(
PogoGetPropertySite.java:49)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjec
tGetProperty(AbstractCallSite.java:231)
        at _Events$_run_closure3.doCall(_Events.groovy:75)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(Refl
ectiveInterceptor.java:1254)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:
90)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1086)
        at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1110)