diff --git a/src/core/runner.ts b/src/core/runner.ts
index f5e244b7..cd7e3f76 100644
--- a/src/core/runner.ts
+++ b/src/core/runner.ts
@@ -25,7 +25,6 @@
 
 import { once, EventEmitter } from 'events';
 import { join } from 'path';
-import { mkdir, rm, writeFile } from 'fs/promises';
 import { Journey } from '../dsl/journey';
 import { Step } from '../dsl/step';
 import { reporters, Reporter } from '../reporters';
@@ -35,6 +34,9 @@ import {
   getTimestamp,
   runParallel,
   generateUniqueId,
+  mkdirAsync,
+  rmAsync,
+  writeFileAsync,
 } from '../helpers';
 import {
   StatusValue,
@@ -146,7 +148,7 @@ export default class Runner extends EventEmitter {
      * For each journey we create the screenshots folder for
      * caching all screenshots and clear them at end of each journey
      */
-    await mkdir(this.screenshotPath, { recursive: true });
+    await mkdirAsync(this.screenshotPath, { recursive: true });
     return {
       start,
       params: options.params,
@@ -170,7 +172,7 @@ export default class Runner extends EventEmitter {
      */
     if (buffer) {
       const fileName = `${generateUniqueId()}.json`;
-      await writeFile(
+      await writeFileAsync(
         join(Runner.screenshotPath, fileName),
         JSON.stringify({
           step,
@@ -322,7 +324,7 @@ export default class Runner extends EventEmitter {
       await once(this, 'journey:end:reported');
     }
     // clear screenshots cache after each journey
-    await rm(Runner.screenshotPath, { recursive: true, force: true });
+    await rmAsync(Runner.screenshotPath, { recursive: true, force: true });
   }
 
   /**
@@ -401,7 +403,7 @@ export default class Runner extends EventEmitter {
     /**
      * Set up the directory for caching screenshots
      */
-    await mkdir(CACHE_PATH, { recursive: true });
+    await mkdirAsync(CACHE_PATH, { recursive: true });
   }
 
   async run(options: RunOptions) {
@@ -448,7 +450,7 @@ export default class Runner extends EventEmitter {
      * Clear all cache data stored for post processing by
      * the current synthetic agent run
      */
-    await rm(CACHE_PATH, { recursive: true, force: true });
+    await rmAsync(CACHE_PATH, { recursive: true, force: true });
     this.currentJourney = null;
     this.journeys = [];
     this.active = false;
diff --git a/src/helpers.ts b/src/helpers.ts
index bdbec50b..69bd5d2b 100644
--- a/src/helpers.ts
+++ b/src/helpers.ts
@@ -31,8 +31,14 @@ import { promisify } from 'util';
 import { performance } from 'perf_hooks';
 import { HooksArgs, HooksCallback } from './common_types';
 
-const statAsync = promisify(fs.lstat);
-const readAsync = promisify(fs.readdir);
+const lstatAsync = promisify(fs.lstat);
+const readdirAsync = promisify(fs.readdir);
+
+export const readFileAsync = promisify(fs.readFile);
+export const writeFileAsync = promisify(fs.writeFile);
+export const rmAsync = promisify(fs.rm);
+export const mkdirAsync = promisify(fs.mkdir);
+
 const SEPARATOR = '\n';
 
 export function noop() {}
@@ -164,11 +170,11 @@ export async function totalist(
   pre = ''
 ) {
   dir = resolve('.', dir);
-  await readAsync(dir).then(arr => {
+  await readdirAsync(dir).then(arr => {
     return Promise.all(
       arr.map(str => {
         const abs = join(dir, str);
-        return statAsync(abs).then(stats =>
+        return lstatAsync(abs).then(stats =>
           stats.isDirectory()
             ? totalist(abs, callback, join(pre, str))
             : callback(join(pre, str), abs)