Basic multi-project build example from docs not working

I have replicated the project structure described in the user docs from here:

…and the build fails with this error:

$ ./gradlew -q action

FAILURE: Build failed with an exception.

* What went wrong:
Task 'action' not found in root project 'messages'.

* Try:
Run gradlew tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

Is the documentation out of date? Does it depend on version 2.13? I’m running 2.12.

Whoops - sorry, I do have a significant difference.

The subprojects do not have build script files named build.gradle, they are named test.gradle instead. And, this is the contents of the settings.gradle file:

rootProject.children.each { project -> project.buildFileName = "test.gradle" }
include 'consumer', 'producer'

I would like this organization to work, but with differently-named build script file names.

Ha! Duh.

Just realized my include statement was in the wrong place.

Never mind!