export declare const RUNTIME: string;
export declare const timerUtils: {
    useFakeTimers(): void;
    useRealTimers(): void;
    advanceTimersByTime(ms: number): void;
    runAllTimers(): void;
    clearAllTimers(): void;
    canUseFakeTimers(): boolean;
};
export declare function skipIfNoFakeTimers(): boolean;
export declare function normalizeGlobalChecks(value: any): boolean;
export declare const isBun: boolean;
export declare const isDeno: boolean;
export declare const isNode: boolean;
export declare const isVitest: boolean;
export declare const supportsFakeTimers: () => boolean;
export declare const setupFakeTimers: () => void;
export declare const teardownFakeTimers: () => void;
export declare const advanceTimersByTime: (ms: number) => void;
export declare const clearAllTimers: () => void;
export declare const expectAsync: (fn: () => Promise<any>) => Promise<any>;
export declare const sleep: (ms: number) => Promise<void>;