import '../../globals.js';
declare class UtteranceQueueTestUtils {
    /**
     * Helper es6 promise timeout function.
     * @param ms
     */
    static timeout(ms: number): Promise<unknown>;
    /**
     * Workarounds that need to be done before each test to let the Utterance Queue finish an timed operation before
     * the next test. This is not needed when running manually, but I believe will fix problems when running on
     * CT/Puppeteer where resource availablility, running headless, or other factors may cause differences.
     */
    static beforeEachTimingWorkarounds(): Promise<void>;
}
export default UtteranceQueueTestUtils;
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