Jest encountered an unexpected token axios. g. If you want to use axios up to 1. Here's what you c...
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Jest encountered an unexpected token axios. g. If you want to use axios up to 1. Here's what you can do:. Mar 2, 2023 · Basically, jest runs on Node. I've created the three files as explained, i ran npm i jest jest-mock-axios axios, and then i'm hitting that wall: FAIL test/UppercaseProxy. Oct 31, 2023 · Jest encountered an unexpected token Jest failed to parse a file. js environment, so it uses modules following the CommonJS. Dec 28, 2022 · Jest encountered an unexpected token Jest failed to parse a file. test. Feb 23, 2026 · Step 2: Fixing ES Modules (ESM) vs CommonJS Mismatches in Jest ES module and CommonJS mismatches are the most common cause of unexpected token errors involving import or export. You must explicitly align Jest’s runtime mode with how your code and dependencies are authored. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. Oct 17, 2022 · Describe the bug With vue-cli + typescript, after updating axios we get errors for all unit tests which have dependencies to axios: Test suite failed to run Jest encountered an unexpected token [. This happens e. Jest encountered an unexpected token: Learn how to fix this common JavaScript error with step-by-step instructions and code examples. The threads span a number of years - meaning that the issue keeps cropping up for people repeatedly. Mar 27, 2020 · 🐛 Bug Report In my jest tests, when i attempt to run jest, this is output: FAIL test/product. it's not plain JavaScript. Oct 11, 2022 · Jest encountered an unexpected token Jest failed to parse a file. These errors can occur due to non Dec 29, 2025 · The jest encountered an unexpected token can be caused by the inability to configure Jest with creat-react-app, Jest not being able to transform packages, inability to transpile modern JavaScript, circular imports when mocking modules, Jest not able to transform the dependency, and incompatible dependencies after the update. Dec 10, 2019 · What worked for me was to make sure that the transform property in the jest config included ts, tsx, js, and jsx for ts-jest and have transformIgnorePatterns include the path too that node module. Apr 3, 2021 · Sorry for the newbie question, but I'm having trouble running the README example. Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Many of the threads are long. Jun 8, 2024 · Test suite failed to run Jest encountered an unexpected token // エラーになる Jest failed to parse a file. x. Jest does not automatically infer the module system your project uses. x, you have to transpile the JavaScript module from ECMAScript type to CommonJS type. adding this configuration lets Jest run without failing and solves the issue for me. Oct 30, 2019 · For me, the following: ` "test": "NODE_OPTIONS='--experimental-vm-modules --experimental-specifier-resolution=node' jest",` doesn't fix the error, but instead changes it from SyntaxError: Cannot use import statement outside a module to Must use import to load ES Module: Dec 29, 2025 · The jest encountered an unexpected token can be caused by the inability to configure Jest with creat-react-app, Jest not being able to transform packages, inability to transpile modern JavaScript, circular imports when mocking modules, Jest not able to transform the dependency, and incompatible dependencies after the update. spec. . May 5, 2025 · Jest encountered an unexpected token Jest failed to parse a file. js Test suite failed to run Jest encountered an unexpected token This Feb 23, 2021 · The Headache If you Google "jest unexpected token", there are several signs that this is a really nasty issue: There are a great many threads on the issue - on Stack Overflow and otherwise. Dec 28, 2022 · Jest encountered an unexpected token Jest failed to parse a file. jsx Test suite failed to run Jest encountered an unexpected token This usually means that you are Oct 26, 2022 · Jest encountered an unexpected token Jest failed to parse a file. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". By default Oct 5, 2022 · my answer addressed the question title: "Cannot use import statement outside a module, with Axios", answering the question of "suggesting solutions to resolve the issue" and it worked in my case. This guide will help you get Jun 27, 2023 · Introduction: Jest, a powerful testing framework for JavaScript and TypeScript projects, occasionally encounters unexpected token errors while parsing files.
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