Betamax is not recording in Grails

Question

I have a class that contains a RESTClient, and it performs a simple get request.

The test is built as follows

@Rule Recorder recorder = new Recorder()

@Betamax(tape = 'meetupEventsList')
void testListEvents() {
    when:
    def instance =  new Client('<apikey>')
    def events = instance.listEvents('<groupname>')

    then:
    log.info("List of events: {events}")
}

The BetamaxConfig.groovy: (Found in grails-app/conf/BetamaxConfig.groovy)

betamax {
    tapeRoot = new File('test/resources/tapes')
    ignoreLocalhost = true
}

The test is running, however I'm not getting anything in the test/resources/tapes directory (in either /test or /src/test/. I'm also not getting any logging from the betamax framework.

What am I doing wrong? Are there any other ways to troubleshoot this?