actually dont import - causes issues

src/cli/index.ts

@@ -30,8 +30,9 @@ import HttpStream from '../formatter/http_stream'
 import { promisify } from 'util'
 import { Writable } from 'stream'
 import { pathToFileURL } from 'url'
-import importer from '../importer'
 
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const { importer } = require('../importer')
 const { incrementing, uuid } = IdGenerator
 
 export interface ICliRunResult {

src/formatter/builder.ts

@@ -21,7 +21,8 @@ import { IParsedArgvFormatOptions } from '../cli/argv_parser'
 import { SnippetInterface } from './step_definition_snippet_builder/snippet_syntax'
 import HtmlFormatter from './html_formatter'
 import { pathToFileURL } from 'url'
-import importer from '../importer'
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const { importer } = require('../importer')
 
 interface IGetStepDefinitionSnippetBuilderOptions {
   cwd: string

src/importer.js

@@ -1,15 +1,13 @@
-/*
-Provides the async `import()` function to source code that needs it,
-without having it transpiled down to commonjs `require()` by TypeScript.
-See https://github.com/microsoft/TypeScript/issues/43329.
- */
-
 /**
+ * Provides the async `import()` function to source code that needs it,
+ * without having it transpiled down to commonjs `require()` by TypeScript.
+ * See https://github.com/microsoft/TypeScript/issues/43329.
+ *
  * @param {any} descriptor - A URL or path for the module to load
  * @return {Promise<any>} Promise that resolves to the loaded module
  */
 async function importer(descriptor) {
   return await import(descriptor)
 }
 
-module.exports = importer
+module.exports = { importer }

src/runtime/parallel/worker.ts

@@ -19,8 +19,9 @@ import { IRuntimeOptions } from '../index'
 import { PredictableTestRunStopwatch, RealTestRunStopwatch } from '../stopwatch'
 import { duration } from 'durations'
 import { pathToFileURL } from 'url'
-import importer from '../../importer'
 
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const { importer } = require('../../importer')
 const { uuid } = IdGenerator
 
 type IExitFunction = (exitCode: number, error?: Error, message?: string) => void

tsconfig.json

@@ -1,6 +1,5 @@
 {
   "compilerOptions": {
-    "allowJs": true,
     "esModuleInterop": true,
     "lib": ["es2019"],
     "module": "commonjs",