def fixture = new StaleOutputFixture(buildDir: nonRegisteredDirectory)
        fixture.createInputs()
        buildScript(fixture.buildScript)
        fixture.createStaleOutputs()

        when:
        succeeds(fixture.taskPath)

        then:
        fixture.staleFilesAreStillPresent()

        where:
        nonRegisteredDirectory << ['not-safe-to-delete', '.']