Client returns 200 supertest returns 404

Express App

`require('dotenv').config();
const express = require('express');
const app = express();
const cors = require('cors');
const PORT = process.env.PORT;

app.use(cors())

app.get('/', (req, res) => {
res.status(200).json({
message: 'it worked'
})
});

app.listen(PORT, () => {
console.log(`Server running on port ${PORT}`)
})

module.exports = app;`
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Test --- App.test.js