Sqlite file db for codeception testing fails

Attempts to use a sqlite file database in the app/cache/tests directory fail. This is determined by clearing the dev MySQl database and populating the test environment database via the console. Test database being populated was confirmed by an external Sqlite Manager. [Tests performed without the sqlite configuration pass.]

codeception.yml:

actor: Tester
paths:
    tests: tests
    log: tests/_output
    data: tests/_data
    support: tests/_support
    envs: tests/_envs
settings:
    bootstrap: _bootstrap.php
    colors: false
    memory_limit: 1024M
extensions:
    enabled:
        - Codeception\Extension\RunFailed
modules:
    config:
        - Db:
            dsn: 'sqlite:./app/cache/test/test.sqlite'
            user: ''
            password: ''
            dump: tests/_data/test.sql
            populate: true
            cleanup: false
            reconnect: true