export const metadata = {
  title: `Errors When Running Tests`,
}

# {metadata.title}

This troubleshooting guide covers common errors you may encounter when running tests in your Medusa application and how to resolve them.

## Loaders for module Workflows failed

If you get the following error when running your tests:

```bash
Loaders for module Workflows failed: Method Map.prototype.set called on incompatible receiver #<Map>
```

This may occur if you have multiple test files and you don't configure your Jest environment correctly. To resolve this, add the following configuration to your `jest.config.js` file:

```js title="jest.config.js"
module.exports = {
  // ...
  setupFiles: ["./integration-tests/setup.js"],
}
```

Then, create the `integration-tests/setup.js` file with the following content:

<Note>

If you're using a version prior to Medusa v2.11.0, change `@medusajs/framework/mikro-orm/core` to `@mikro-orm/core`. Learn more in the [v2.11.0 codemod](!docs!/learn/codemods/replace-imports).

</Note>

```js title="integration-tests/setup.js"
const { MetadataStorage } = require("@medusajs/framework/mikro-orm/core")

MetadataStorage.clear()
```

Refer to the [Testing Tools](!docs!/learn/debugging-and-testing/testing-tools) guide for more details.