Our support for issuing changes via the ChangeApplier in the IoC testing framework is rather old-fashioned and has a syntax which dates from before the FLUID-5024/FLUID-5114 model relay rewrite. It still exposes access to the applier's modelChanged event which should really be an implementation detail, as in:

            {
                listenerMaker: "fluid.tests.makeChangeChecker",
                makerArgs: ["{asyncTester}.options.furtherTextValue", "textValue"],
                // alternate style for registering listener
                spec: {path: "textValue", priority: "last"},
                changeEvent: "{asyncTest}.applier.modelChanged"
            }, 

We should normalise this syntax to conform with the standard one for triggering changes in the new(er) declarative framework as per http://docs.fluidproject.org/infusion/development/ChangeApplierAPI.html#declarative-style-for-triggering-a-change